Quote:
Originally Posted by J-Mech
Ohhhh..... It has a standard bore on one side, and .010" over on the other?
Unless you don't put many hours on it, I don't think it will last "a long time". Twin cylinder with one hole larger than the other will cause issues. One will work harder than the other, one will run rich the other lean.... so one cylinder will tend to run hotter than the other. Might last a while, but depends on how hard you use it, and how well you tuned it. Keep it clean, and hope for the best.
As a note to others: Always match bore sizes.
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I am betting it will last a long time. When I worked in the machine shop years ago it was not unusual to have engines come in the had one or more cylinders bored oversize to repair damage. I do not know about Kohler but most all piston manufactures shorten the compression distance of oversize pistons to keep the compression ratio the same and to maintain balance they would match the weight to same as stock. Now for performance or high rpm use I would never chance mixing bore sized or pistons from different manufactures. On I side note I once bought an engine from a Farmall M for parts and when I tore it down it had three cylinders with the stock 3-7/8 bore and one with a 4 inch overbore sleeve and piston. The fella that I bought it from had ran it for over 30 years like that and it never gave him any problems. When I later asked him about it he said that he had a problem with it and at the time all they could get was the overbore kit for the bad hole. I would never do this my self but it does work. As I will using this tractor for ditch mowing duty only it will not get many hours a year so for me this is a way to not have to spend a bunch of money on it. There is no way I will spend the money it costs to rebuild a KT or Mag Kohler. Just not worth it in my book. But J Thanks for your concern and thoughts.
Today I hope to finish this sickle bar tractor project.
Later
Tom