Possible short block ?

[Gerry]

Customer has a blowed up Briggs 31P677 0144-B3 100427 ZA on a John D LA115. He has a donor engine 33R877 0002-G1 140814 ZD, he wants to use. First visual differences are the OEM has a fuel pump and different electrical system. I checked and the crank is the right length and the OEM flywheel will bolt down on the donor. My question is if I strip the OEM and put on donor will the donor work as a short block? I usually stay away from Frankenstein stuff but may try this. Thoughts please.

As always Thanks In Advance.

[KE4AVB]

Better double check the flywheel and crankshaft as they change the keyway in 2012. One engine is a 2010 and the other is 2014 engine. And the two set are not compatible with each other.

[KE4AVB]

APSI 89

Crankshaft/Flywheel Keyway changes 2012

[Gerry]

Thanks, I put the OEM stator, flywheel and carb assy on the donor. Had spark but no start, when cranking sounded like a out of time starting...ie tad spitting and attempt to backfire. Put donor flywheel on starts right up, charging and will carry the load with PTO engaged.

[KE4AVB]

Thanks, I put the OEM stator, flywheel and carb assy on the donor. Had spark but no start, when cranking sounded like a out of time starting...ie tad spitting and attempt to backfire. Put donor flywheel on starts right up, charging and will carry the load with PTO engaged.

Ahh, I see that Briggs must have also changed the keyway position thus changing the ignition timing. So I need to add a note to my copy of their service bulletin.