Pullstart 65,444 #26 Posted July 6, 2022 19 minutes ago, wh500special said: Strange timing on this thread being resurrected…I literally just got off the phone with an engineer for one of the major air cooled diesel manufacturers and he reported that their engines have a mean time between failure of 6500 hours under load. That’s the 7 hp version but i imagine the 10 will be analogous. He said the Yanmar clones are a complete crapshoot but on average make it about 200 hours before they lock up or grenade. They’ve tested plenty of them apparently. Your mileage -or hours- may vary. Steve Any details on the shortcomings? This one rolls over and has TONS of compression. Share this post Link to post Share on other sites
wh500special 2,256 #27 Posted July 6, 2022 15 minutes ago, Pullstart said: Any details on the shortcomings? This one rolls over and has TONS of compression. I didn't ask for anything specific, but the general tone of things is that the clones have random metallurgy and poor quality control. Sometimes a casting in place of a forging. Once in a while you get a great one...once in a while a dud...generally inconsistent quality. Steve 1 Share this post Link to post Share on other sites
cschannuth 3,817 #28 Posted July 7, 2022 11 hours ago, wh500special said: Strange timing on this thread being resurrected…I literally just got off the phone with an engineer for one of the major air cooled diesel manufacturers and he reported that their engines have a mean time between failure of 6500 hours under load. That’s the 7 hp version but i imagine the 10 will be analogous. He said the Yanmar clones are a complete crapshoot but on average make it about 200 hours before they lock up or grenade. They’ve tested plenty of them apparently. Your mileage -or hours- may vary. Steve Sounds like you may have been speaking with a Yanmar engineer, ha ha. 1 1 Share this post Link to post Share on other sites
wh500special 2,256 #29 Posted July 7, 2022 (edited) Maybe. Maybe not. Been working with them and the other small diesel makers on a project at work. Not only do they all know their products extremely well, they know their competitors’ products just as well. Could be any of them. It’s unpublished data, so not an official lifetime rating. So I’m being somewhat cagey. steve Edited July 8, 2022 by wh500special 2 Share this post Link to post Share on other sites
