2 year old Toro 20031 wont run

bluesmurfApril 23, 2006

I have a 2 year old Toro 20031. When I prime it, it will start, but then stop immediatly. Any info or help would be appreciated my lawn is starting to get long and needs mowed badly.

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tekumcman(Upstate SC)

Remove the nut holding the float bowl on. This brass
nut is also the main fuel jet feeding the carburetor.
Fuel will, of course, run out when you do this, so
you might want to clamp off the fuel line with a pair
of vice grips so only fuel in bowl runs out. Leave bowl
in place. On the upper side of this nut you'll see a
very small hole just below where the threads end. Take
a piece of small wire, poke out this hole, and spray
nut completely with carb cleaner. Replace nut, and try
again. This usually is the "quick fix". A small piece of
trash or a bit of varnish from fuel left in the bowl over
the off-season is all it takes to cause this symptom.


    Bookmark   April 23, 2006 at 3:16PM
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Thanks, I cleaned the nut and it runs like a charm now.

    Bookmark   April 23, 2006 at 6:42PM
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T-Man, you are THE man.

I posted to the referenced thread below

and checked the float bowl nut for blockage but not thoroughly. I was focused on the float sticking and just did a visual on the horizontal port but not the tiny vertical opening.

After your post and realizing that the nut is also the fuel jet, I did a complete cleaning.

For the record, I used a common paper clip wire to clean the horizontal port and an unfolded paper staple to ream out the vertical jet. Then I hosed it out with a straw on a can of W-D 40.

She started right up and ran like a champ. Your insight that the nut was also the jet was key.

Thank you very much.

If you are ever in Redding, California look me up. Lunch is on me!


Here is a link that might be useful: Update on B&S 6.0 HP 12H802, Still Won't Run

    Bookmark   April 26, 2006 at 12:56AM
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hakkamike(7B Fort Worth Area)

HEY, I just found this thread and I was having the same problem with mine. Cleaned it out and it runs like a champ!!!!!!! Thanks Mucho

    Bookmark   April 1, 2007 at 8:48PM
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I have a Craftsman Model # 917.376272 with the same problem I will be attacking tomorrow. Man the internet is a wonderful thing!! Thanks guys.

    Bookmark   August 31, 2007 at 6:56PM
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Cleaned the little port out with wire and now it runs like a top! Thanks again

    Bookmark   September 3, 2007 at 9:09AM
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Found this thread via google and after 5 hours of cleaning and working on my briggs motor I was able to get it running by cleaning out the float bowl nut a little better. Thanks!

    Bookmark   May 7, 2008 at 10:55PM
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I had the same issue... and it ended up being the same solution...

I am a happy camper...

Thanks very much,

and may the google be with you....


    Bookmark   June 13, 2008 at 10:24PM
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could this be the solution to my problem? my mower will run for a while and then quit, especially on hills. I was thinking a fuel line clog.

    Bookmark   July 2, 2008 at 6:06PM
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Every spring, i get a lot of old mowers from the garbage night pickups, that have that problem!' And, i fix them and sell them to other folks, who then come in several years later with the mower they had bought, and it has the same problem! WOO_HOO!!
Somebody asked me why i work on mowers! I tell them there ain't much else i can do. And, its keeping me out of the assisted living places, or the "funny farm"!

    Bookmark   July 12, 2008 at 8:58PM
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What "Bowl" are you guys talking about the primer bulb? Want to try this to my Toro. What exactly am I looking for??? If not the bulb is it before or after? Thanks!!

    Bookmark   July 15, 2008 at 6:57AM
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I JUST found this and feel so dumb for setting the bolt aside the last three times I tried cleaning out the Carb.

T-man is my hero!

The bowl that we are talking about is just below the primer bulb and has a brass bolt on the bottom. If you remove the bolt there are holes ON THE BOLT that need to be cleaned out.

I can't wait until the next time someone tries telling me we were better off before the internet...Thanks Agian!!!

    Bookmark   May 19, 2009 at 12:16PM
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Thanks to the group. Simple repair, only took about 10 minutes and saved the $75+ the local shop was going to charge me for the "repair".

    Bookmark   April 3, 2010 at 9:00PM
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Just to clarify for people reading this thread down the road, there are 4 holes on the bolt that need to be cleaned using an unbent staple or something similar. Set the bolt flat on its head with the threads pointing up -- there are two holes across from each other on the side of the bolt shaft just below the lowest threads, there's one angled hole on the side of the bolt shaft at the top of the threads, and then there's one hole on the top of the bolt running up and down the bolt shaft. All these holes need to be clean. Don't forget to put the washer back on when you re-attach the bolt to the carburetor bowl, or you'll have leaks.

    Bookmark   April 5, 2010 at 8:15AM
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I fighting a similar problem, put on a new carb, new plug, new air cleaner, new gas and still have issues. It now starts hard, eventually I get firing, but it sputters and kicks out some smoke, and a few more pulls it will get over it and run like a top for a few minutes. After a few minutes it will miss once, then run fine for another 20 or 30 seconds then the miss becomes more frequent, then it just dies like it's getting no fules or no spark. It may fire once when dying. If I pull the plug immediately it's not fuel soaked nor is it dry. It looks like it's getting spark, but it isn't bright. Funny thing is if I hit the primer bulb a few times when it starts to miss it extends the run time for an additional 20 or 30 seconds like it's a fuel issue. I've got gas flow when I disconnect the fuel line. If I pull the gas cap when running makes no difference. It was doing the same thing before I replaced the carb. I've pulled the cover and cleaned around the magneto and kill switch assembly. I'm at a loss other than spending another $50 for the coil assembly. ANY IDEAS???

    Bookmark   May 8, 2010 at 3:48PM
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Thanks tekumcman,

Someone gave me a nice John Deere mower, which they were going to throw away, which would not run correctly .

This is exactly what was a matter with it. Thanks so much. I almost feel bad about getting such a nice mower for free.

    Bookmark   August 9, 2010 at 4:03PM
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Oh Man THANK YOU tekumcman
I am a happy idiot! I had dissembled a Tecumseh 5.5 hp carb and fuel tank and gas line 3 times. Each time just laying the brass bolt aside, however I guess I should not call it a brass bolt since in reality it is a brass main injection valve. DUH!!!!!!!!!!!!!!!!!!!!!!!!! LOL I had cleaned the carb, mine has a plastic float so no adjustment there. I had replaced the fuel line. Had removed and cleaned out the fuel tank itself. Replaced the spark plug although I knew I was getting good spark. I removed and cleaned the air filter thinking it was clogged and possible flooding the engine although I was pretty sure it was not getting gas. I even went so far as to wrap the plastic primer bulb in Teflon tape thinking maybe I had a crack in it and it was sucking air? My next move was to replace that bulb. Then I read your post and 10 minutes later I was trimming weeds. With a field trimmer that was running like it did the day I bought it!


    Bookmark   September 18, 2010 at 9:47AM
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Will this be the same on Briggs and Stratton? I feel like a retard. I can pull a car engine rebuild, and put it back in, in a weekend. Can't keep the mower running though. Dang !

    Bookmark   September 18, 2010 at 4:03PM
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