When selecting piston kits make sure you select the correct design on all K Series and Magnum engines.
There are 2 basic designs, the Old Style piston and the New Style (Mahle) piston. If you have the Old Style piston and you are Not replacing the rod you have to stay with the Old Style piston design. If you want to upgrade to the better New Style (Mahle) piston you can but you have to also replace the rod with the New Style rod. The Mahle style piston skirt profile was modified to provide a better fit within the cylinder bore. The ring channels were redesigned and the wrist pin was strengthened. A different connecting rod is required because of the extensive design changes. Beware of shops selling the aftermarket "rebuild kits" more then likely these are imports. These parts in many cases will not inter-change with genuine Kohler parts, example aftermarket rings will not fit in genuine Kohler pistons. They are also selling the old style piston design, further they are also claiming "It's what the rebuilders use". In my 30 plus years in the power equipment industry I have never heard of the term "rebuilders" in the small engine business unless they may be referring to backyard mechanics that are using aftermarket internal engine parts. You may be saving in price but not Quality.
I would like to thank Brian for his excellent service. I did not expect a call to verify that I ordered the correct engine and also did not expect a... Read More ->
I stumbled upon your site after doing a search for parts for my Lawn Tractor. OPE beat Sears prices by 40% and delivery times by 10 days for the same... Read More ->
If I need it they have it or can get it. some delays due to Kohler. The packing has changed and is amazing, they handle my order with a professional... Read More ->
OPE had what I needed for my 31 year old Kohler engine. Ordered on Monday and received on Wednesday from Oregon to East Texas. Price was very... Read More ->