1862 Let it die or rebuild
 

after getting the 1641 ready for work, brought the 1862 into the shop. Let marvel mo. do it's job over the week. Today I got the M18 to break free and spin. Almost tried to start and run it, but thought better of it and a good thing. Tore it down and this it what I found.

This motor has been tore apart before. evidence of something broke in the past. have not found any metal pieces in bottom end, But. Also rod on the starter side was binding a little, pulled the rod off the crank.

Jug and piston from the starter side don't look good either.

I think the crank will clean up alright, but I'm pretty sure I'll need a rod, jug, and a piston.

What the 1862 looks like before tear down. Not sure what's up with the Hydro, but looks like she got some leaks.

Just my 2 cents but you should run the numbers. From what I see the rear needs a reseal job. As far as the engine goes I'd be looking at a repower. Again just how I would look at it. If you can find a cheap 2185 they make good organ donors. Holler if I can be any help. How is the rest of the tractor?

I might have a jug for that side.u

I agree with Sam on a 2185 donor as the kohler Magnum Twins can get very expensive when overhauled properly. Going one step further, if you find a CH18 Command from a 2185 (or something else), removed the throttle limit pin on the side of the carburetor and re-adjust the governor making it a 20 HP.

Wowah, please expand on that with the ch! I'm interested. Will it hurt anything?

The Kohler CH18 and CH20 are the same bore/stroke and carburetor including jetting. If you remove the throttle limit pin and re-adjust the governor (as you adjust them at full throttle not running) it becomes a 20 HP. You are not turning more RPM's, your just adjusting the governor to bring the carburetor to wide open throttle under load. If you was to replace the mags, ignition module and flywheel with the advanced spark it becomes a 22 HP. You can just replace the flywheel as the magnets are advanced on the CH22 flywheel and that will get you 22 HP but if you don't install the mags/module it will sometimes kick back on the starter when starting as the module retards the timing at start up. You can also additionally add a CH 27 cam and make it a 23 HP. This reminds me of the good old pulling days when we were limited to a 18 hp in the stock class and how we could cheat (oops I mean interpret the rules) to our advantage.