Wheelhorse#1 1,645 #1 Posted March 28, 2022 (edited) Did Kohler stamp the piston size on all of their pistons? Only way to know for sure is to measure ? This is a K-181 Edited March 29, 2022 by Wheelhorse#1 Share this post Link to post Share on other sites
squonk 41,028 #2 Posted March 29, 2022 Nothing means STD. 4 Share this post Link to post Share on other sites
WHX?? 48,783 #3 Posted March 29, 2022 A .003 can also mean standard or factory piston. It escapes me why Kohler did that. Other than that all will be stamped .010, .020 .030. Share this post Link to post Share on other sites
Achto 27,505 #4 Posted March 29, 2022 8 hours ago, WHX?? said: A .003 can also mean standard or factory piston. It escapes me why Kohler did that. I think this was done to compensate for machining errors. 3 1 Share this post Link to post Share on other sites
953 nut 55,081 #5 Posted March 29, 2022 9 hours ago, WHX?? said: 003 can also mean standard or factory piston. It escapes me why Kohler did that. Like @Achto said. They wanted to be able to use the blocks that came through while the machinists were having a cup of coffee or whatever. 2 2 Share this post Link to post Share on other sites
WHX?? 48,783 #6 Posted March 29, 2022 11 hours ago, WHX?? said: It escapes me why Kohler did that. 2 hours ago, Achto said: I think this was done to compensate for machining errors. And I just read that in the manual the the other day and you think I could remember?!?!? I do remember the manual didn't mention a cupojoe 'Nut! 2 Share this post Link to post Share on other sites
WHX?? 48,783 #7 Posted March 29, 2022 (edited) Not too far Dan I did find this.... 'course this may not apply to aftermarket rings??? Edited March 29, 2022 by WHX?? 2 3 Share this post Link to post Share on other sites
Wheelhorse#1 1,645 #8 Posted March 29, 2022 (edited) All .Thanks for the great info,very much appreciated .I have a set of standard NOS rings I bought a wile back. This 8horse I bought for a song and dance and a couple wooden nickels! With just minor maintenance, it runs great and zero smoke. Inwas thinking of throwing rings in it but after looking at the cylinder It looks surprisingly good. I guess at some point it was at least re-ringed,can even see the cross hatches still there. I was amazed when I got these Kohler rings in the mail. Now that’s what I call quality .The price marked on them is $13.25😉that’s certainly not close for what I paid for them, Edited March 29, 2022 by Wheelhorse#1 1 1 Share this post Link to post Share on other sites
Wheelhorse#1 1,645 #9 Posted March 30, 2022 Does this piston look too worn? Replace and re ring it and hone ,what would you do ? It’s going on a B-80.Main use to cut grass and pull a cart around the back 40. Share this post Link to post Share on other sites
Wheelhorse#1 1,645 #10 Posted March 30, 2022 (edited) IMG_3859.MOV Edited March 30, 2022 by Wheelhorse#1 Delete Share this post Link to post Share on other sites
Wheelhorse#1 1,645 #11 Posted March 30, 2022 IMG_4004.MOV Share this post Link to post Share on other sites
squonk 41,028 #12 Posted March 30, 2022 I have seen pistons erode there on several engines. It's the hottest point during combustion. The exhaust flame is just going to beat on that area more to the point of directly effecting the top ring. If this was going to be just a put put tow me and the grand kids around tractor, I'd consider leaving it. Put if it's going to mow,plow snow and work, I'd replace it and have a machine shop check the cylinder. 1 Share this post Link to post Share on other sites
Wheelhorse#1 1,645 #13 Posted March 31, 2022 Thanks Squonk I’ve seen this piston wear in all three WHs I bought .Figured it was due to heat as you said it is the hottest point at the exhaust valve. I’m going to do the math as explained By 395nut in the thread at the top (Can I just hone the cylinder) Poor mans machinist .I fit that category ! 1 Share this post Link to post Share on other sites
