Greetings,

My sincere apologies for this long post with pics but I want to be as thorough as possible.

I need information on two problems I'm having

1- How to correctly install a new connecting rod

2- The correct torque specifications for the Tecumseh 7 1/2 HP OH195SP Snow King engine.

Let me begin by stating I have posted about this engine before but requesting info about the age of the motor.

The engine is a Tecumseh OH195EP off a Ariens ST7524E (932141) snowblower.

I bought this off a friend that was original owner and only used 3 times since 2007. The engine was never tampered with.

It was working perfectly, I was giving it as a gift to my sister. I drained the oil to transport it, I also

gave my brother in-law the proper oil to add when he got home with the unit.

Long story short, he didn't add the oil and started it which seized the engine.

I picked it up to repair and discovered only minimal damage, connecting rod broke as well as flywheel shear pin.

The internals suffered no damage with only aluminum welded to crankshaft journal from connecting rod.

I used muriatic acid to dissolve the aluminum, then polished with 400 & 600 wet & dry paper, looks brand new.

I ordered a new connecting rod and awaiting its arrival.

I have the engine service manual for it that owners manual listed, Tecumseh Service Manual for 4 cycle overhead valve (695244A).

The manual is useless to me since it seldom refers to my specific engine.

Manual Cover Picture

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I need advice on how to properly install the replacement connecting rod (on order, not received yet).

Using Google I found only one video that showed how to replace the connecting rod. Although it was for a 9 HP Snow King,

My biggest mistake when I disassembled was not to mark the piston and connecting rod of how it was installed in the cylinder.

Looking at his video I found it contradictory to how mine was set up.. He stated the connecting rod should be installed with the stamped numbers on the casing facing you, with the long bolt on top and the shorter bolt with oil dipper on bottom.

My piston is marked with an arrow on both the top and side skirts.

If I follow his advice and connect the rod to the piston with the arrow pointing right on the piston(to the valves), and the stamped numbers facing you, THE LONG BOLT will be on bottom, not on top as his video shows.

Below is pic of his installation

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You can see the video here.

http://www.youtube.com/watch?v=AoGIAPdBJuU

Below are pictures of my piston and broken connecting rod exactly how I removed from engine.

I did mark one side to show how original was so I have reference when replacing with new one.

Unfortunately I did this after I removed from engine, should have done before sliding all the way out.

Notice my piston arrow pointing to the right with the stamped numbers showing, but long bolt on bottom.

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Below is pic of my piston turned 180 degrees, notice long bolt on top, but no stamped numbers and piston arrow pointing away from valves.

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Below is pic of the information the service manual shows for connecting rod installation.

Does this mean my piston can be installed in either direction and disregard the arrows stamped on the top and skirts,

I do believe they are there for a purpose and would need to go in the direction of the arrows.

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Now to tackle the next problem.This engine is a nightmare to find information on since it's a 7.5 HP as well as dual shaft,

It's never shown in any of the torque specifications charts I have obtained.

I need to have the correct torque specifications for the OH195SP engine. The block is aluminum with a cast iron flywheel.

I need the following:

1-connecting rod

2- cylinder cover

3- flywheel nut

Below pic is specs form service manual but does not show my engine.

Notice the two options for connecting rod, either 105 or 210 in lbs, I'm sure it is the 105 since the connecting rod bolts

only have a 1/4" head. I think the cylinder cover should be 115 in lbs.

As far as the flywheel goes, there are three options, I believe it would be 550 ft lbs since the flywheel is cast iron.

Could somebody review these specs and advise the proper settings since I'm lost on this.

Perhaps somebody has a better publication that shows the specs only for the OH195SP engine.

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I am truly sorry for making this post so lengthy but the lack of information for this particular engine is frustrating.

Any advice or suggestions would sincerely be appreciated, please advise if any other information is required.