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Older Snapper mower. 6 hp quantum.xm engine. Part of engine model # unreadable. What I can read is model H802. Type 1987-B1. Code 002522. Can't upload photos. Files too large.

Trying again

Complete model code 12H802-1987-B1

802574 ARMATURE, Magneto

Thank you.

What is the engine RPM setting of 12H802-1987-B1

blaster 2023 said:

What is the engine RPM setting of 12H802-1987-B1

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max RPM of push mower engine is dictated by length of the blade. Blade tip speed cannot exceed 19,000 fpm which translates to 3627 for 20 inch blade 3454 for 21 inch blade and 3298 for 22 i.ch blade, but max speed can also be lower when dictated by the mower OEM>

Thank You.

My Snapper 12" 12H802-1987-B1- 3200 B & S engine is running at about 2800 RPM and has vibration. When this mower is running the self propel disks and shaft is spinning.
If the Crankshaft is not bent, what else can cause vibration?
I need a service and parts number manual and can't find one to download.
Thank you.

bent or unbalanced blade will cause vibration

Parts and user manuals can be found HERE

Thank you, Is the Crankshaft 691450 ?

Looks like your date code is 00 so 691450 is correct, but before changing the crank, I would make sure the blade isn't bent and that it is balanced.

Will Do, I didn't think of a bent blade.
Thank You.

Check for balance too. If one side of the blade has more metal than the other it can cause significant vibration.

Will Do, I didn't think of a bent blade.

I took the mower to a Snapper Dealer, the Crankshaft is not bent and the blade was sharp & Balanced. He installed the blade with a impact driver.
Vibrations gone. suggested I may not have had the blade tight enough.