Engine Rebuild K-241

[eralbert]

The 10 hp Kohler gave up the ghost and I tore it down...the crank journal is chewed up and the bore is scarred a little. The old piston was .030.....if I remember , that is all she wrote for boring the cylinder...think this one has fought it's last fight.

Any advice would be appreciated....

Rick

[ol'George]

If the bore is just slightly scratched most times it can be reused.
Was it using oil/burning before you tore it down? a reputable machine shop can sleeve it back to std. size.
does the crank measure standard size or is it undersize? if standard it can be turned undersize and fitted with a new rod.
What you might want to do, is see what that machining/parts would cost vs. a good used engine.
I do remember it being mentioned that a larger piston from a 12 h.p. can be fitted but can't remember if it was a Kohler or not, I'm sure someone will post here.

[Matt G.]

If the PTO end of the block has 'K301' cast into it, you should be able to go to a 12 hp standard piston.

[Leon renaud]

Originally Posted by Matt G.

If the PTO end of the block has 'K301' cast into it, you should be able to go to a 12 hp standard piston.

Hey Matt;
I've been saying that the local IH dealer and my father in law both claimed that they upped his first Cubs C.I.s by boring to the next size.I've been saying he went from 7 to 10 hp, Now you have me wondering if his first Cub was a 10 and bored to 12!Only thing I'm sure of is it was a 64 or 65 Hydo unit and that 10 HP was involved not even sure of the model just that he bought it new late 64 or very early 65

[Matt G.]

That's possible. I think a lot of the early 10 hp engines had the "K301" cast into the block.

[eralbert]

Thanks to everyone....

Matt...looked for the stamp....any idea where on the PTO side is would be....so far I'm unable to find it.

[Matt G.]

The PTO end of an engine is the crankshaft end opposite the flywheel. Start reading your service manual...that term is referenced multiple times, particularly in the reassembly section, and you are going to mess something up if you don't know what that means.

[eralbert]

Originally Posted by Matt G.

The PTO end of an engine is the crankshaft end opposite the flywheel. Start reading your service manual...that term is referenced multiple times, particularly in the reassembly section, and you are going to mess something up if you don't know what that means.

Matt...I know which end is the PTO end of the engine...I have rebuilt 4 of these in times past. I just have never had the occasion to look for the casting number ...I wondered if it might be in a certain place and I was overlooking it.

I will give you that " you are going to mess something up", but it won't be from not reading the service manual.

Thanks,

Rick

[Matt G.]

Oops...I didn't read your initial post right...I think my mind turned around 'where' and 'on'...my bad

Look slightly above and to the left of the crank. I wish I had a picture, as that would make this much easier.

[Matt G.]

Right about here:

block.jpg