Well today I was pretty busy. Decided to slow down a bit though and check to see if the crankshaft on the green engine is interchangeable, rather than rush ahead with painting.
Well, it is indeed the same engine, they must have used the same mold to cast the newer engine block because the same mountings for the points and condenser are right behind the flywheel. The only difference is the cast iron bore, magnetron, smaller fuel tank and different sump cover.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/04/full-9109-21510-20150425_170605.jpg)
The different sump cover is due to another substantial difference. The clue is there in the Model Number, 812
32
That '3' denotes a 'Flange Mount, Ball Bearing' PTO. That's why the PTO oil seal is larger - due to the ball bearing behind it.
Problem is that there is deep vertical scoring on the cylinder walls and I can feel them by running my finger nails around the cylinder. Probably needs to be honed and an oversized piston and rings fitted. I am afraid it will probably end up being used for parts.
As it's a cast iron sleeve, it may well be OK for further service with just a good hone. Worth a try, anyway.
The only thing I have to do now is get a propane torch to heat up the PTO and remove the rusted steel sleeve that was used to mount the aluminum pully.
Yeah, rust-bound sleeves are a bit of a pain. If you don't intend to salvage the sleeve, I'd take to it with the angle grinder, and thin the side nearest the keyway, to the point where the sleeve can be split with a cold chisel. It'll come off easily then.
