Briggs and Stratton Riding Lawn Mower Engine Replacement? I am the proud inheritor of a Yard-Man "Easy Rider" rear-engine...

I am the proud inheritor of a Yard-Man "Easy Rider" rear-engine riding lawn mower powered by a 12.57 cu. within. 5HP Briggs and Stratton vertical crankshaft engine. The following are the identification codes rotten the engine tag:

MODEL: 130902
TYPE: 0355 02
CODE: 76102507

I cannot come across to find a replacement engine out there, as the contrivance was probably built around 1980 or so (I'm guessing). I'd own to imagine that there's a more up-to-date engine that I can drop into this creature.

Is it workable to replace such an old engine next to something with a few more "horses?" I'm really have trouble getting any info on "OEM"-type replacements.

Thanks!

Jayson
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Answers:    As stated, the shaft size is the most important entry. The mounting pattern will be matching on a similar sized engine. The engine you have be made in 1976, they haven't changed much over the years. I would conjecture that you could go up towards 10 hp up to that time the shaft size changes.
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If you are handy, you can probably replace the motor near another similar unit...and if you prod carefully, a the same motor should be available. The criteria would be bolt pattern, and shaft size, as powerfully as overall dimensions if the motor is enclosed.
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