Cetan08 311 #1 Posted December 2, 2018 I am thinking about repairing my old Onan BF MS. One piston has had the carb screw or something beat it up. Rings and all move freely but piston just looks bad so want to replace it. Need rings for both cylinders and head gaskets. Engine ran good but no power and smoked some. Everything has standard stamped on it. I have checked all over the web and not able to fine anything for this engine. Anyone know of a source for rings and such. I am in Ohio so local would be nice but not essential. Thanks Share this post Link to post Share on other sites
DerekN 5 #2 Posted December 2, 2018 @boomers_influence Boomer 651-437-2826 or boomersonanparts.com He has helped me multiple times. 3 1 Share this post Link to post Share on other sites
Shynon 7,435 #3 Posted December 2, 2018 1 minute ago, DerekN said: @boomers_influence Boomer 651-437-2826 or boomersonanparts.com He has helped me multiple times. 1 Share this post Link to post Share on other sites
lynnmor 6,777 #4 Posted December 3, 2018 I may have some new valve guides, let me know if you need them and then I'll dig them out. 1 1 Share this post Link to post Share on other sites
onanparts.com 178 #5 Posted December 4, 2018 On 12/2/2018 at 2:05 PM, Cetan08 said: I am thinking about repairing my old Onan BF MS. One piston has had the carb screw or something beat it up. Rings and all move freely but piston just looks bad so want to replace it. Need rings for both cylinders and head gaskets. Engine ran good but no power and smoked some. Everything has standard stamped on it. I have checked all over the web and not able to fine anything for this engine. Anyone know of a source for rings and such. I am in Ohio so local would be nice but not essential. Thanks Original bore on the BF is 3 1/8". Some were or have been punched out to the more common 3 1/4". If the original bore then new or used pistons will be difficult to locate. The onan # for 3 1/8" rings is 113-0174. Head gaskets are 110-3181. We keep those on hand. If you can't find a 3 1/8" piston the block can be safely bored out to 3 1/4". Those pistons are readily available. # 112-0264. TJ 2 Share this post Link to post Share on other sites
Cetan08 311 #6 Posted December 4, 2018 Thanks to everyone for your replies and information. I spoke with Boomer today and he set me up with everything I need for my engine. Hope to have it up and running this weekend. Thanks again everyone. Share this post Link to post Share on other sites
