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Flying Blind - Overhauling Kohler Engine
I'll wish you luck. Hope you have a nice warm place to do this sort of work. It's a pretty good feeling once you rebuild one and fire it up for the first time. Well, it is as long as it runs
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Flying Blind - Overhauling Kohler Engine
Just noticed your tool purchases didn't include a cylinder hone. You did hone the cylinders, right? And ream the ridge?
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Flying Blind - Overhauling Kohler Engine
Ken, I must admit I did not hone the cylinder. I read what I could on this subject. My neighbor said he could still see the cross hatching and to just put the pistons and rings in.
I did clean the ridge but with fine emery cloth. I also read one post that said you can use fine emery cloth in a diagonal pattern rather than honing the cylinder. My understanding is that you need a drill press to hone the cylinder, correct?
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Flying Blind - Overhauling Kohler Engine
No. A hand drill will work fine for this. You are not trying to remove any material from the cyllinder, just make the surface rough enough to hold the oil.
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Flying Blind - Overhauling Kohler Engine
AV8R, then I could do the same with emery cloth correct? I considered doing this but was afraid of the dust that I would get through the gearing below the piston. Obviously it is too late to do this now and I will take my chances. Now that I know how to do this and have the tools - it will be easy to take corrective action.
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Flying Blind - Overhauling Kohler Engine
Did the exhaust have a leak at tear down?
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Flying Blind - Overhauling Kohler Engine
Art, I'm not sure what you mean. The engine would run fine for about an hour - then black smoke would come out of the exhaust and the engine lost power. The exhaust valve looked fine when I pulled it but it is interesting that the top edge of the piston that failed faced the exhaust valve. I saw no other problems other than the top edge of the piston. As the subject says - I am flying blind .
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Flying Blind - Overhauling Kohler Engine
Like AV8R said, honing roughens up the surface to both hold the oil and provides a good mating surface for the rings to seat properly. If the cylinder is glazed the rings won't seat and the engine will use oil. A hand drill is fine for honing - if it needed boring more equipment would be needed but that's what machine shops are for. Hopefully the cylinder walls are still rough enough to seat the rings. Good luck!
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Flying Blind - Overhauling Kohler Engine
That more then likely would have been an electrical problem. The highest heat in an engine will be at the exhaust valve.
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Flying Blind - Overhauling Kohler Engine
Got the engine on the Gravely last night. Got her started - that was great but carburator was spitting some drops of gasoline and I couldn't get the engine running right. Tonight I made a float adjustment and she's purring like a kitten. Hooray!
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