C-120 Engine Compatibilty

[rmaynard 16,301]

I am building a tractor from the ground up using parts taken from a C-120, C-160, B-100. All are 1977 models. Frame is from a C-160. 8-speed transmission, steering, dash tower, belt cover, foot rests are all C-120. PTO hardware is C-120.

I need to find a working 10 hp or larger engine for this tractor.

My question is, what engines are totally compatible and interchangeable to a 1977 B-100/C-120/C-160 set-up? I know that there are older K241S, K301S, and K341S engines that don't have the same spec numbers as the 1977's, and I am not sure of their compatibility.

Should I stick with searching for:

K241S-46756D

K301S-47421D

K341S-71128A

or will others fit up with no modifications?

Bob

[rmaynard 16,301]

Bump.

Haven't gotten any response to the original post, so I modified my question to make it a little clearer.

Bob

[pfrederi 18,696]

I recently put a K301 from an Electro12 into a c101 frame. Mounting was no issue only work was to rewire for a breakerless magneto system. and change the throttle linkage.

Also put a Magnum 12 from an unknown WH model into a C81 and changed the motor from a frame mount to a shaker mount. (That required swapping oil pans and some work on the engine block to get it to seal to the smaller oil pan (just some jb weld)

As long as the engine you pick came from a wheel horse you should be able to make it fit...

Are you going to use the shaker (isolated) mount or bolt right to the frame? That would just be an oil pan swap. (just check the rod dipper for clearance)

[Don1977 605]

I copied this from another post:

"JDs and Cubs that used a fore and aft engine mounting (driving the unit off the flywheel end of the crank and the electric PTO off the other end didn't need to worry about end thrust and bushings are cheaper than ball bearing."

The old K series Wheel Horse engines had ball bearings on each end of the crank shaft.

They could take the side force of the manual clutch. Hope this answers your question.

[rmaynard 16,301]

Are you going to use the shaker (isolated) mount or bolt right to the frame?

[pfrederi 18,696]

Any large flat bottom oil pan Kohler from a WH should work for you.

[rmaynard 16,301]

Thanks for the info.

Bob

[rmaynard 16,301]

Any large flat bottom oil pan Kohler from a WH should work for you.

If I take a K241AS-46766D from a 1979 C-101 8-speed, and replace the oil pan with a K241S pan, will everything thing else fit without modification?

[TT-(Moderator) 1,162]

The oil pans will not interchange between those two engines.

The "A" in "AS" means special oil pan - which (in this case) is smaller and more squared-off to use with the iso-mount cradle.

You already have a tractor with the large, more rectangular oil pan, so if you look at the bottom of the engine block you will see "tabs" on the front & back with bolts going down through into the oil pan. The tabs are not there on the "AS" block.

[rmaynard 16,301]

The oil pans will not interchange between those two engines.

The "A" in "AS" means special oil pan - which (in this case) is smaller and more squared-off to use with the iso-mount cradle.

You already have a tractor with the large, more rectangular oil pan, so if you look at the bottom of the engine block you will see "tabs" on the front & back with bolts going down through into the oil pan. The tabs are not there on the "AS" block.

Can an "AS" be adapted to use on a B-100 or C-120?

[MikesRJ 558]

... and we'll call it ... Franken-Maynard!

[TT-(Moderator) 1,162]

Can an "AS" be adapted to use on a B-100 or C-120?

Yes - but it not with off-the-shelf parts.

I put a K301AS (from a Ford LGT120) on a newer Power King (was an M12 Magnum) by fabricating "L" brackets (angle iron) to bolt to the small pan.

If the tractor is a long frame, the iso-mount cradle can be used to attach the engine, but the mounting block holes will need drilled in the frame. The rubber mounts will also need replaced with solid mounts so the engine can't move. (the front tab of the belt guard attaches to the engine on the pre-'78 tractors)

[rickv1957 75]

... and we'll call it ... Franken-Maynard!

Rick

[rmaynard 16,301]

Can I solid mount it using this B-80 bracket?

Is the hole pattern the same? According to the parts diagram, it looks like the drain plug is in the bottom. I would have to cut a hole in the bracket to accommodate it.

I have the opportunity to pick up a 1979 C-101 with this K241AS, a mower deck and a snow blower all for $150.00. If I can adapt the "AS" to my frame without having to modify anything other than the mount, I will be happy.

Bob

[rmaynard 16,301]

Does anyone have a picture of the bottom of the oil pan of a K241AS-46766D showing the mounting holes and drain plug?

Bob