Return to the Tractors Forum | Post a Follow-Up

 o
Craftsman 21.5 HP Intek loss of power

Posted by cutngo 8b (My Page) on
Mon, Mar 24, 14 at 18:01

It has 407 hrs. on the motor. It started to lose power while mowing. I immediately shut it off and checked the oil. Not much. I filled it up with oil and cleaned the air filter. The motor will run fine under no load. Once the blade is engaged it runs strong momentarily and the bogs down to failure/off if I let it.

One plug was sooty. No oil on the plugs.

I've never changed the fuel filter.

Do you have any ideas?


Follow-Up Postings:

 o
RE: Craftsman 21.5 HP Intek loss of power

Well, it sounds like it might be a fuel starvation issue, especially if it has the original fuel filter.
But having one sooty plug out of a pair is not good either.
But the worst thing you said was that you checked the oil after it began losing power and there was not much.
How come you don't check the oil prior to using the machine?
Cause that's sure what it sounds like to me.
If that is not the case, and the oil being low was unexpected, you may have an oil consumption problem and that could be due to a few different things such as engine wear or a leaking head gasket.
How about posting the engine model and type number from the engine and/or the Craftsman technical model number from below the seat so that we might know exactly which Briggs engine we are discussing.


 o
RE: Craftsman 21.5 HP Intek loss of power

Under seat

Model # 917.274040
Engine: Family 5BSXS.7242VF 276023

21HP OHV INTEK

On valve cover:

MODEL 407577
Type. 0284 E1
Code 040806YC

I don't have good answer for not checking the oil level. I did find a lot of dirt in the plug wire connections. As I said, it runs strong until I engage the blade, then it slowly bogs down to a near stop of the motor.


 o
RE: Craftsman 21.5 HP Intek loss of power

Another quick check to rule it out is to run it with the gas cap off or very loose to rule out a gas tank venting problem. The little holes in the gas cap get clogged up fairly regularly and it would cause the symptoms you speak of.


 o
RE: Craftsman 21.5 HP Intek loss of power

Will check out this afternoon. Playing golf right now! Thanks for the ideas.


 o
RE: Craftsman 21.5 HP Intek loss of power

I tried to post this last night, but for some reason it did not post.
You need to go ahead and replace the fuel filter. Assuming this machine is around 10 years old, it is reasonable to think that the fuel filter has reached the end of its usefulness.
There may be some other things going on with this machine, but you need to change that fuel filter so we can at least scratch it off of the suspect list.

This post was edited by mownie on Thu, Mar 27, 14 at 0:00


 o
RE: Craftsman 21.5 HP Intek loss of power

When I pull the left side plug wire off, the engine dies. When I pull the right side off, it continues to run. Does this mean the right cylinder is kaput?


 o
RE: Craftsman 21.5 HP Intek loss of power

Yes-
First thing I'd do is swap spark plugs to determine it's still the Right side.
If So, remove the Right valve cover and look for something amiss, like a bent/loose push rod.
IF every thing looks intact, rotate the engine by hand a couple turns and see if both push rods move an equal amount (flat cam lobe?)
If things still look good, start it (have rag handy) and look for a mist blowing out toward the push rod side and HOPE it's a leaking head gasket.

This post was edited by bill_kapaun on Tue, Mar 25, 14 at 17:50


 o
RE: Craftsman 21.5 HP Intek loss of power

I have one broken and one bent pushrod. Now what?


 o
RE: Craftsman 21.5 HP Intek loss of power

did you get all of the pieces out?

Check the rocker arm fasteners, and see if they are loose, hopefully that is all.
let us know what you find.


 o
RE: Craftsman 21.5 HP Intek loss of power

I need to find one small piece. I found a whole bent rod and a half of the other rod. What are "rocker arm fasteners"? Thank you!


 o
RE: Craftsman 21.5 HP Intek loss of power

Ok, the two pieces I have make up one whole rod. I don't know where the other rod is. Please continue to advise. Thank you!


 o
RE: Craftsman 21.5 HP Intek loss of power

Only one place it can be and that's the sump.
It may not be economically feasible to repair this.
Without a complete disassembly to inspect cam shaft, cylinders, heads etc., you may be throwing away good money trying to when you consider the cost of individual parts. Considering the problem occurred from low oil, you may have a lot of other damage.

Go to the Briggs website and download the IPL for your engine. That will have exploded drawings & part#'s.


 o
RE: Craftsman 21.5 HP Intek loss of power

Thank you! What is the typical life of a properly maintained motor like this?

I guess it's time to move on to a push mower. We put in a pool last year, so not as much grass to cut.


 o
RE: Craftsman 21.5 HP Intek loss of power

Naw, just unbolt the engine and turn it upside down, unbolt the bottom cover, remove the pushrod/and/or /parts, and reassemble, unless you see big hunks of engine missing/floating about... Then re-assemble, you will need a new sump gasket for starters, then when you get back to the heads, they likely worked loose, and bent the pushrods.


 o
RE: Craftsman 21.5 HP Intek loss of power

A ray of hope, you say? So, if I just find a rod down there, is it just a matter of putting it back in and adjusting the valves?


 o
RE: Craftsman 21.5 HP Intek loss of power

Another question: is there a repair manual for Sears Lawn tractors?


 o
RE: Craftsman 21.5 HP Intek loss of power

Forgive me if I've missed this. It would be wise to confirm if you have a loose valve guide in the cylinder head. The guides work loose and can cause your push rod damage. Nothing real hi tech here, just compare how far the guides protrude from the head. If one is out further than the rest, you will need a new head or I think Walt posted about a fix. With 1 cylinder showing signs of oil burning, it could very well be a head gasket that is the culprit. However, if there are signs of dirt ingestion down through the air filter housing, I'd probably stop now. Plus, if this was run real low on oil, it wouldn't be unreasonable for this engine to tear itself apart after the repairs. This twin is not super forgiving.


 o
RE: Craftsman 21.5 HP Intek loss of power

The engine holds 4 pints. I added 16-20 ounces of oil. Is that considered low enough to cause this damage?

What would be signs of dirt ingestion? There wasn't any dirt past the air filter to the carburetor. There is a lot of dirt on the valve cover of the damaged cylinder, whereas there is no dirt on the outside of the other cylinder.


 o
RE: Craftsman 21.5 HP Intek loss of power

***"then when you get back to the heads, they likely worked loose, and bent the pushrods."***
Are you saying the HEADS worked loose.............and bent the pushrods?


 o
RE: Craftsman 21.5 HP Intek loss of power

Cutngo, hopefully then you are fine. No dirt ingestion is key here. There have been many that failed. I've come across these with less than half a sump full that made it until the next time at least until that the owner ran them low. What may be helpful here too would be to piece the push rods together and see how much of what rod you are missing. One is aluminum, one steel. Plus post back on the guides.

This post was edited by tomplum on Thu, Mar 27, 14 at 11:29


 o
RE: Craftsman 21.5 HP Intek loss of power

Ok, the motor is out and the sump has been removed. I found both pieces of the steel rod in the sump. All pieces are accounted for. What is my next course of action? Thank you all!


 o
RE: Craftsman 21.5 HP Intek loss of power

Inspect cam lobes & cylinders for scoring etc.


 o
RE: Craftsman 21.5 HP Intek loss of power

You'll need a new gasket with pump and crank seals to sew that up.Or a complete set if you wish to go further. If guides were squarely in place in the heads and the studs that held the rockers in place are also secure in the head , it should run and breath again once it is assembled correctly. It may have been a good idea to compare valve lift before the sump was pulled, but you could do it carefully now. Did you come out of this thinking you have an oil consumption problem? Or maybe the oil had gotten low due to a little neglect? IE if you thought you may have a consumption issue, how far are you comfortable going?


 o
RE: Craftsman 21.5 HP Intek loss of power

"Inspect cam lobes & cylinders for scoring etc."
They look good.

"If guides were squarely in place in the heads and the studs that held the rockers in place are also secure in the head , it should run and breath again once it is assembled correctly."
Yes they are.

"Or maybe the oil had gotten low due to a little neglect? "
Most probably this.

"It may have been a good idea to compare valve lift before the sump was pulled, but you could do it carefully now."
How do I do this?

Thanks all!


 o
RE: Craftsman 21.5 HP Intek loss of power

If you have inspected the cam shaft lobes and do not see any scoring, you can close up the sump.
Clean off any rust or burrs on the crankshaft before lowering the new crank seal into place. Use very fine emery cloth to clean the crankshaft off. Then clean it up with a clean shop towel. Oil the crankshaft surfaces where the seal rides before sliding the seal into place.
To check the cylinder head for a valve guide that may be loosening and migrating, you will need to turn the crank until the piston on that cylinder is down. You determine this by looking into the spark plug hole with a light until you see the piston move down at least an inch.
With the piston down, you will need to push each valve on that head down with a suitable tool (wooden dowel 3/4" diameter about 12" long works well).
You may need a helper with this as you will need to measure the distance that the valve travels before stopping when you push the valve down using the wooden dowel as a push tool.
You need to have something like a popsicle stick to mark on to compare one valve to the other in this operation.
It works like this.
Place the end of the dowel against the end of a valve spring cap so that one edge of the cap is not covered up by the dowel. (you must be able to see the edge of the valve spring cap)
Now, push in on the valve until it stops. Hold the valve down while your helper places the marking stick on the cylinder head next to the valve and mark a line that corresponds to the edge of the valve cap.
Next, move to the other valve and repeat, making a second mark corresponding to the edge of that valve spring cap.
Then you compare the marks on the stick.
If both marks are not lined up at the same distance from the head, a valve guide has loosened and is backing out of its bore. The mark that is the greatest height from the head identifies the culprit valve guide.
If both guides are at the same height, I will be surprised.
If a valve guide has loosened and is migrating, the recommended fix is a replacement head.


 o
RE: Craftsman 21.5 HP Intek loss of power

Mownie, After I put the new seal on, do I put the motor back onto the tractor? Then do the valve guide check?


 o
RE: Craftsman 21.5 HP Intek loss of power

BTW, the stud in the rocker arm is tight in the head, and the rocker arm is not cracked. I will check the valve guides today. Thanks!


 o
RE: Craftsman 21.5 HP Intek loss of power

I think I found the culprit. The cooling fins on this particular cylinder are full of dirt. I would post a picture, but I don't know how.


 o
RE: Craftsman 21.5 HP Intek loss of power

Here is the photo you PM'ed me. And your comment accompanying the photo was that the other cylinder was near spotless.
That build up certainly is not good. I can't tell for sure but at least some of that crud looks like the work of mud dauber wasps. I don't know why one side would have been favored over the other side unless the side with the buildup offered easier access/entry for the wasp somehow.
The rest of the debris looks like toasted grass clippings and fluff that piled up over time due to the air ducts being already partly blocked off.
Build up like that will cause overheating of just the affected cylinder (insulating layer + reduced air flow across fins).
That kind of overheating will cause valve guides and/or valve seats to loosen and move.
Valve guide movement usually results in bent broken pushrods (like you see), but when a valve seat jumps out of place, it typically can cause complete destruction of the entire engine............depending on just when the valve seat decides to jump out of its bore.
At this point it is imperative that you determine that one of the valve guides has moved before even thinking about installing and trying some new pushrods.
Right now, as you look at the 2 valve springs on that head...are both of those springs standing up at equal distance from the cylinder head? If they are equal right now, you will need to proceed with checking how far down they can be depressed.
But, if one of the valve springs is sitting lower than the other, the valve seat (inside combustion chamber) has moved and preventing the valve from closing.
In either case, the head will have to come off.


 o
RE: Craftsman 21.5 HP Intek loss of power

I would say these are even. Do I pull the head now, or push the springs in?

This post was edited by cutngo on Fri, Mar 28, 14 at 14:14


 o
RE: Craftsman 21.5 HP Intek loss of power

I'm guessing something is amiss with the lower valve. Hopefully you can see the silver band, whereas you don't see the silver band on the upper valve. Next? BTW, I can mash both springs in equally.

This post was edited by cutngo on Fri, Mar 28, 14 at 14:28


 o
RE: Craftsman 21.5 HP Intek loss of power

Head and cylinder wall looks good. Lifters move freely.


 o
RE: Craftsman 21.5 HP Intek loss of power

Looks OK?


 o
RE: Craftsman 21.5 HP Intek loss of power

The valve with the "silver band" (on the right in the photo) is the intake valve, The silver band is the spring on the valve stem seal.
The exhaust valve does not feature a seal on it.
I would say that you have been living with a leaking valve cover gasket on the cylinder too.
Looking at your photos here, I can't detect anything that would have led to the engine tossing a pushrod.
I surmise that the second pushrod got turned loose by the first pushrod (or pieces) interfering with its rocker arm.
It is possible that the head was heating up to the point that one valve stem (exhaust most likely) was attempting to stick open and the exhaust pushrod got loose first.
You said you recovered all the bits of the broken pushrod, Is that pushrod made of steel or aluminum?
The combustion chamber of the head looks to be OK so far as "I don't see any broken stuff", but it does look like the engine is an oil burner.
I can't see enough of the pushrod gallery in the head to tell if it might have a blown head gasket.
You got any more photos showing the head and block and the head gasket areas where the pushrods go?


 o
RE: Craftsman 21.5 HP Intek loss of power

I have a steel and an aluminum push rod.


 o
RE: Craftsman 21.5 HP Intek loss of power

Here's another.


 o
RE: Craftsman 21.5 HP Intek loss of power

I'm not sure what else you need. But I would be glad to take a picture of it. Thank you!


 o
RE: Craftsman 21.5 HP Intek loss of power

Nice pics. What could be better than OHV porn? Post a pic of the head side of the gasket.


 o
RE: Craftsman 21.5 HP Intek loss of power

Excuse me sir, are you saying peel the head gasket off and take a picture of it's other side?


 o
RE: Craftsman 21.5 HP Intek loss of power

Yep. It looks like the missing pic is the cylinder side though.


 o
RE: Craftsman 21.5 HP Intek loss of power

I'll have to get it after I receive my award. Since my other pictures were "porn", I thought I'd give you something else to look at.


 o
RE: Craftsman 21.5 HP Intek loss of power

Hahahaha!
Only on a DIY forum like this could someone call these kinds of "full disclosure" photos porn and everybody appreciate it.
Yes, the only thing "not shown" that might still hold a clue is the view of the head gasket where it cozies up to the cylinder block. The view of where it mates to the bottom of the head does not appear to have failed. If it failed, it may be at the cylinder deck.
The "most revealing" scene is right at the edge area of the pushrod gallery where the head gasket typically fails on these engines. I may fail between the head and the gasket, or between the cylinder deck and the gasket. Getting a look at that may explain why this engine is an oil burner.
And we all knew your engine has a mix of aluminum and steel pushrods. My question was meant to find out which pushrod was in pieces, the aluminum one or the steel one?
This type of analysis "after the fact" is helpful (sometimes) to determine WHY the failure began.
So far it seems we have ruled out a migrating valve guide.
In your post at 14:10 on 3/28, the valve springs don't appear to be at equal height (I turned my computer monitor upside down to get a better look). The valve spring on the left (when picture is right side up) appear to be a tad shorter than the one on the right.
There are still some questions to come about the physical condition of the 2 pushrods, but, one step at a time so you don't get overwhelmed.
And I hope you did WELL in the 5K, you certainly did GOOD in the 5K.


 o
RE: Craftsman 21.5 HP Intek loss of power

As you can see, both rods broke.


 o
RE: Craftsman 21.5 HP Intek loss of power

Let's try again.


 o
RE: Craftsman 21.5 HP Intek loss of power

Another shot at the valve springs.


 o
RE: Craftsman 21.5 HP Intek loss of power

"So far it seems we have ruled out a migrating valve guide."

Were did this happen? Upper valve stem in above photo looks awfully fat to me.

I have sent the OP a Service Manual and told him that the valve guides should not protrude more than 1/8" from casting. Those push rods do not bend for no reason.

Walt Conner

Got to add more ink to my monitor to keep up with this thread.


 o
RE: Craftsman 21.5 HP Intek loss of power

OK, I was going on that you stated earlier you had one bent and one broken pushrod.
Well, get the valve springs off and get a closer, unobstructed view of the valve guides.
It does not appear that this head gasket blew out. But that still leaves the other cylinder suspect on the oil burning though.
And it may turn out to be worn out intake valve stem seals and worn piston rings.


 o
RE: Craftsman 21.5 HP Intek loss of power

"So far it seems we have ruled out a migrating valve guide."

Where did this happen?

I based my comment on cutngo's remark that both valve springs can be "mashed in equally".


 o
RE: Craftsman 21.5 HP Intek loss of power

Please tell me how the valve springs come off. The manual for this engine shows a special tool to depress the spring, but does not tell you what to do next.


 o
RE: Craftsman 21.5 HP Intek loss of power

As seen here.


 o
RE: Craftsman 21.5 HP Intek loss of power

Take your two thumbs and depress the valve spring then pop the retainers out.

Walt Conner

Well you need to place the head on something like a wadded up rag to keep the valve seated while doing this.

This post was edited by walt2002 on Sat, Mar 29, 14 at 21:50


 o
RE: Craftsman 21.5 HP Intek loss of power

When I push down, everything goes down. IDK?


 o
RE: Craftsman 21.5 HP Intek loss of power

Focus on what Walt says about placing something under the valve inside the combustion chamber, so the valve itself can't move. And when you push down, you DO NOT press down on the end of the valve stem, all you want to push against is the cap that contacts the spring itself.
The idea is to hold the valve face (that's what the rag or towel is for) from moving so that the spring and spring cap move down, and then the spring cap retainers (a small magnet can help you pick the retainers out).
After the retainers are out, the valve spring and cap lift off leaving the valve in the head.
Then you pull the valve out from inside the combustion chamber.


 o
RE: Craftsman 21.5 HP Intek loss of power

The spring will not budge on either valve.


 o
RE: Craftsman 21.5 HP Intek loss of power

For your viewing pleasure.


 o
RE: Craftsman 21.5 HP Intek loss of power

Valves. The valve spring retainers disintegrated upon removal.


 o
RE: Craftsman 21.5 HP Intek loss of power

With the combustion chamber side of valve (valve face) resting on a balled up rag/towel on your work bench.
Take a socket, about a 9/16" will do. Put that socket on a short extension.
Set the open end of the socket on the spring cap with the valve stem centered in the center of the socket.
Now, gently strike the end of the extension with a mallet or light hammer as though you want to tap the valve spring down.
This will break the "stiction" or varnish that develops over time in service.
Once you have "broken" the spring cap loose from the 2 valve keeper collets, you can push the valve spring down as described earlier.
Beware, you don't want to be too rambunctious with that hammering. If you get carried away, and the collets jump out when you strike, the valve spring may fly off. That seldom happens but you are a newbie at this, and so a word from the wise....yadda yadda.


 o
RE: Craftsman 21.5 HP Intek loss of power

***"The valve spring retainers disintegrated upon removal."***
You mean like they broke in half?
Show us a photo of them.
Probably just seeing valve spring collets for the first time :^)


 o
RE: Craftsman 21.5 HP Intek loss of power

I hope theses aren't a gazillion dollars a piece. I lost two of them. Ok, duh, locks. Now what guru's?

This post was edited by cutngo on Sun, Mar 30, 14 at 14:58


 o
RE: Craftsman 21.5 HP Intek loss of power

Those are just the normal state of the retainer halves. How the heck did you lose 2 ? Briggs part # 499586. That's gonna cost you $4.50 and comes as 2 keepers and a new spring cap.
Remove the valve stem seal from the intake valve guide and let's see if the valve guides are a matching set (meaning are they both at equal height from the floor of the head?).
'nuther photo please.


 o
RE: Craftsman 21.5 HP Intek loss of power

Is the intake on the left?


 o
RE: Craftsman 21.5 HP Intek loss of power

The intake valve is the LARGER of the 2 valves.
The intake valve is the only valve featuring a rubberized valve stem seal on its valve guide.
Yes, in your last photo, the intake valve is on the left (unless I transpose the image).


 o
RE: Craftsman 21.5 HP Intek loss of power

The rubber ripped.


 o
RE: Craftsman 21.5 HP Intek loss of power

I don't see a pair of pliers to grip the valve stem seal in your photo.
At what point are you referring to the manual? :^)
You will be needing a new seal anyhow.

This post was edited by mownie on Sun, Mar 30, 14 at 19:18


 o
RE: Craftsman 21.5 HP Intek loss of power

This smartphone user ain't too smart. I missed the pliers picture on my little screen. :( Here we GEAUX!

This post was edited by cutngo on Sun, Mar 30, 14 at 20:02


 o
RE: Craftsman 21.5 HP Intek loss of power

EAUX KAY
Get yourself a straight edge and a ruler (or 2 rulers as I have mocked up in a photo I borrowed somewhere) and measure down from a straight edge laid across the head (as shown) to the top edge of each valve guide.
If the 2 measurements are EXACTLY IDENTICAL, the valve guides have not migrated.
If the distance to one is less than the distance to the other one, the shorter of the 2 values indicates the guide that is loosening and migrating.


 o
RE: Craftsman 21.5 HP Intek loss of power

We have some migrating going on down south, here! The exhaust side is migrating (the shorter distance). Next?


 o
RE: Craftsman 21.5 HP Intek loss of power

I don't remember if Walt Conner has a fix for loose valve guides.
I think Walt's fix was for rocker ball studs that back out on some Briggs engines.
If there is no "field expedient repair" for a loose valve guide, a new head is your option.
You will need to determine whether this is cylinder #1 or cylinder #2.
Cylinder #1 is the cylinder that is closest to the flywheel. So you will need to measure that, or determine from the image below.
Walt may chime in or you may want to e-mail him if he does not jump in on this.

This post was edited by mownie on Mon, Mar 31, 14 at 1:32


 o
RE: Craftsman 21.5 HP Intek loss of power

Cylinder #2 by that diagram. Hey Walt!


 o
RE: Craftsman 21.5 HP Intek loss of power

The cause of your troubles is that stupid E-Plug!!!! They are the most worthless pieces of chit out there!!!!


 o
RE: Craftsman 21.5 HP Intek loss of power

Hmm, so do you think I have a case? I don't mind contacting them and referring them to this post.


 o
RE: Craftsman 21.5 HP Intek loss of power

I think E plugs are a scam but-
EXACTLY HOW did it cause the problem.
Anybody can pull wild claims out of their ..........
How about some EVIDENCE!


 o
RE: Craftsman 21.5 HP Intek loss of power

I think I created a perfect storm. :(

Poor spark plug choice
Ethanol infested gasoline
Dirt dobber encrusted cooling fins
One pint low on oil

Anything else?

So, after I order a new head, do I put it all back together and run it?

This post was edited by cutngo on Mon, Mar 31, 14 at 21:31


 o
RE: Craftsman 21.5 HP Intek loss of power

As I said many, many posts back privately to you, your problem was caused by a cooling problem as you have finally shown in pictures. I also pin pointed that you were likely running on one cylinder and how to check that and where to look when you determined that to be the case. I have a proven fix for valve guides that move which I thought I had sent to Mownie a year or so ago. I will send it if requested privately but I am dubious about your ability to utilize it. Your best bet may be to locate a good used head, I sell them for $20 ea. plus shipping but am out.

Walt Conner

Your problem was not caused by any spark plug regardless of how much someone may dislike them. I would have no use for them either anyway.

This post was edited by walt2002 on Mon, Mar 31, 14 at 21:47


 o
RE: Craftsman 21.5 HP Intek loss of power

Looking for a good, used head. Any ideas! "Dubious" was an understatement.

Also, I'm looking at ~$200 to repair this and replace the mower belt right now. IYHO, would you repair a 10-12 yr. old Craftsman tractor, w/ 407 hrs on it?


 o
RE: Craftsman 21.5 HP Intek loss of power

***"would you repair a 10-12 yr. old Craftsman tractor, w/ 407 hrs on it?"***
I dunno, my menagerie includes machines like my wife's 1968 Snapper Comet, my dad's 1986 Snapper RER, my FIL's old 1988 Huskee garden tractor, and my own newest 1994 White Outdoor GT 185. We have various reasons for keeping them all, but sentimental feelings rank high with the first 3.
A person must become a "care giver" and learn how to develop some useful mechanical skills (and a few tools) if they intend to keep and use older machines.
One must also develop an appreciation for preventative maintenance procedures and scheduling to keep machines running.
Too often people don't do much if any preventative maintenance, and then the work falls into the category known as Damage Control. I can tell you as a professional mechanic, there is no control in Damage Control.
The alternatives are that your pockets must be a little deeper so you can replace machines often, or simply hire out the grounds maintenance to landscaping contractors.


 o
RE: Craftsman 21.5 HP Intek loss of power

I know I created this damage by not maintaining it. I don't mind fixing it, but what could go next? Is there any maintenance for the transmission before it goes out?

I know how to maintain my car (300,500 miles on original motor and drivetrain) I just neglected the mower.


 o
RE: Craftsman 21.5 HP Intek loss of power

How does this look?

http://m.ebay.com/itm/321207598493?nav=SEARCH


 o
RE: Craftsman 21.5 HP Intek loss of power

If you are looking for head # 1 , pricing looks good. $88 is list.


 o
RE: Craftsman 21.5 HP Intek loss of power

Head #1 it is. Ordered today. Thanks!


 o
RE: Craftsman 21.5 HP Intek loss of power

How did we go from your identifying the cylinder in the image I posted as Cylinder # 2, to ordering Head # 1?
In the list of Briggs part numbers that the ebay site shows, it says the head replaces 792299, which is the # 1 head.
If you identified the cylinder as # 2, then the Briggs number for that head is 792300, and that number is not in the list of heads the ebay head replaces.


 o
RE: Craftsman 21.5 HP Intek loss of power

It's been a long week. All work and no play makes cutngo a mistake prone boy. Upon further review, it is cylinder #1. Sorry for the confusion.


 o
RE: Craftsman 21.5 HP Intek loss of power

Whew, better a mistaken identity of the cylinder number in this case than the perceived situation of yesterday.
Sometimes Murphy looks the other way (not often).
:^)


 o
RE: Craftsman 21.5 HP Intek loss of power

Time to put the sump back on, and the motor back on the tractor. Any words of wisdoms here, other than torqueing sequence? Is any Permatex used on the gasket?


 o
RE: Craftsman 21.5 HP Intek loss of power

I use Hi-tack myself. Shellac could be fine too. Briggs instructs you to use sealant in areas that may have been marred on clean up. You will want to take the pump cover off and along with that replace the o ring.


 o
RE: Craftsman 21.5 HP Intek loss of power

Sump installed with new seal and O ring. Awaiting new head.


 o
RE: Craftsman 21.5 HP Intek loss of power

Parts are in!! What are these three red rings?


 o
RE: Craftsman 21.5 HP Intek loss of power

You can hold bunches of broccoli together with these. I've seen it before. Or they double as intake manifold seals....


 o
RE: Craftsman 21.5 HP Intek loss of power

Thank you. Will they work for asparagus? I'll be putting the head on tomorrow. Do I put any oil on parts here? ie cylinder walls, valve springs


 o
RE: Craftsman 21.5 HP Intek loss of power

You should put some clean engine oil on the valve stems, the top ends of the valve stems and where the push rods fit to the rocker arms. Also oil the rocker arm pivots themselves. Just a couple of drops at each point mentioned.
And don't forget to put oil in the crankcase :^)


 o
RE: Craftsman 21.5 HP Intek loss of power

What is this thing that attaches to the crankshaft? If I attempt to spin it 360* the ears on it hit the front axle.


 o
RE: Craftsman 21.5 HP Intek loss of power

Cranked her up and oil was pouring out of the oil pump circular plate, on the bottom of the engine. I'm not too happy right now.


 o
RE: Craftsman 21.5 HP Intek loss of power

Forgot an Oring? The PTO clutch should be anchored in place so it does not spin. A bracket is laying around somewhere...


 o
RE: Craftsman 21.5 HP Intek loss of power

IDK, but I ordered a new plate an o ring today. Can this be changed from underneath? Or do I need to pull the motor again? What bracket are you talking about? Thanks!


 o
RE: Craftsman 21.5 HP Intek loss of power

The clutch housing locks into a locator bracket which bolts into the frame rail w/ 2 bolts. It is part # 171258 if you don't have one. If you cant see the plate screws, the motor will need to come off. You may find it preferable to do it that way anyways.


 o
RE: Craftsman 21.5 HP Intek loss of power

I think the bracket is there. Is it rod shaped?

I can see two screws. I was thinking if I unbolted the motor to the frame I could slide it over to the hole in the deck. If I could do that, would I be able to keep what's in there in place, when installing the seal? Or would it be a hassle and a oily mess? I've drained the oil from the drain tube, but I never seem to get much out it.


 o
RE: Craftsman 21.5 HP Intek loss of power

You can see it if you go to Searspartsdirect and look in the drive section. It is essentially a rod mounted to a plate. Removing the pump cover you will get oil and possibly a pump rotor and shaft in your hand at the same time.


 o
RE: Craftsman 21.5 HP Intek loss of power

How many photos have you taken during your teardown process? Those photos should show you how the PTO clutch and anti-rotation feature were configured.
Pulling the engine back out will give you some additional (and needed) hands on training.
Aside from that, my crystal ball looks pretty murky this morning. :^)


 o
RE: Craftsman 21.5 HP Intek loss of power

Just got finished mowing the lawn! Another feather in y'all's cap! I can't thank you enough!!


 o
RE: Craftsman 21.5 HP Intek loss of power

Lawn looks good and only 100 posts.


 o
RE: Craftsman 21.5 HP Intek loss of power

101, who's counting?


 o
RE: Craftsman 21.5 HP Intek loss of power

Good deal. Congrats on your success! Gee, you think you'd need chains mowing uphill like that....


 o
RE: Craftsman 21.5 HP Intek loss of power..

I think we can make 200..


 o
RE: Craftsman 21.5 HP Intek loss of power

Hill? What hill? We don't have those things in south Louisiana.


 o
RE: Craftsman 21.5 HP Intek loss of power

No hills? I dunno, that slope looks pretty steep to me.
Congrats on the rebound.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Tractors Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here