Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

tecumseh spec number for the engine is 72510G.  I see many different engines with the oh195sa model number, but can't learn anything about the 72510G spec number.  I assume that number determines crank shaft length/diameter. . .am I right?  why do I ask?  My buddy has a Toro that he had repowered with this engine.  Subsequently his transmission has failed.  Another friend has an ariens 924038 chassis for us.  You get the idea.  I need to know a bit more about the engine.  The thought is the engine may be right, not the crankshaft.  Anyone know of a resource to learn what the spec number means? 

May make the engine work with a crankshaft sleeve from smallenginewarehouse.com  other thoughts?

working this backwards. . .the best I can tell without actually being in the same room as the snowblower ~ the donor Toro uses a 3 inch long shaft and the ariens a 2 3/8 long inch shaft. Both have a 1 inch diameter.  Anyone know if this presents a problem?  Is there enough room in the belt cover that it doesn't batter?  I saw a pic of someone who drilled a hole in the belt cover to accomodate a shaft that was too long. . .thoughts, experiences?

spoke with someone who answers the tecumseh customer support line. . .that spec number is for an engine with 2 15/16 inches long cs.  The original engine used a 2 3/8 inch cs.  I think we can work it out. 

I’ve done over a couple with cranks that were a bit short for the pulley length without problems.

 

For belt covers I’ve had to modify several with cuts here and there to accommodate the replacement engines.  The worst was fitting an new 11hp OHV for an 8hp L-head  That  same Ariens body came with 11hp L-heads but the footprint slightly different in the front. 

 

The belt cover was short in height and the front just hit the end of the crank which I later noticed wore it’s own hole for a clean looking cut.  The height was done by cutting  both sides of the top about 4-5 inches and one end making a liftable flat about 4-5 inchs long and as wide as the belt cover top.  That was pushed up in place leaving a lower top side section exposed.  The lifted up top section accommodated the drive pulley and taped in place with an arch.  The tape used was black duck tape which was cross layered a few times.  It’s held up for two seasons without the tape lifting.   Duct tape patches covering other cutout sections also have held up.  Molding and shaping with fiberglass would be much better but messy to work with.

 

The ¾ to 1 inch conversion sleeves with keys are fantastic.