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#1
04-13-2011, 11:31 PM
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Rebuilding k241 on 105
Hey all, looking for some experienced advice...
I brought my block to the machine shop for a bore because a ring broke and scored the walls pretty bad. Additionally the shaft has seen many decades of use and needed to be taken down .010. I am going with a Stens rebuild kit, and was informed that the machinist must have the piston in order to measure and bore appropriately. The machinist said it was not necessary as Stens and Kohler have very accurate specs for their pistons... Has anyone had similar response? If it is bored without the piston in-hand, what is the difference in size between cylinder and piston supposed to be, or what range should it fall within... like .001 to .005...??? Just curious. Any insight would be greatly appreciated as I wouldn't want to do a rebuild on this engine for another 20+ years...  - Love them Kohlers! Thanks!
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I tend to heat food in the microwave timed to my favorite model...i.e. 147 seconds, or 123.... My Cubs - 62 O', 70, 5-100's, 2-71s, 102, 105, 125, 2-123s, 2-106's, 126, 3-147s, 2-1650s, 2 Plow Blades w/f & n/f, QA42a Blower, QA36a, #1 Tiller w/extensions, buncha' decks and weights/chains, broken knuckles... 
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#2
04-14-2011, 12:01 AM
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I have always tried to have the piston available for the machinist to get an exact bore. Problem with that is, what if the scratch were deeper than say .010 over and then you would have to have a .020 on hand etc. and etc. I would say that the kohler pistons are very consistent with size and quality.
This link will have all the specs you will need: http://www.kohlerengines.com/onlinec...df/tp_2379.pdf
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DWayne 1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck 10" moldboard plow 2016 XT1 42" deck 18HP
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#4
04-14-2011, 02:57 PM
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Thanks for the feedback. Yes, machininst did indicate .030 for piston. The rod is not a concern since that is a machined part and generally exact, it is the poured piston that can have slight variances in measaurement due to cooling rates... That's at least what I was told. I guess I order the .030 over and .010 under and go for it. Thanks Much!
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I tend to heat food in the microwave timed to my favorite model...i.e. 147 seconds, or 123.... My Cubs - 62 O', 70, 5-100's, 2-71s, 102, 105, 125, 2-123s, 2-106's, 126, 3-147s, 2-1650s, 2 Plow Blades w/f & n/f, QA42a Blower, QA36a, #1 Tiller w/extensions, buncha' decks and weights/chains, broken knuckles...
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