Onan 6.5NH-RV Running Rough
I posted this in the smokstak forums, but it can't hurt to ask the experts here, too. 1984 vintage Onan 6.5NH-RV. Came with the RV. It had sat for about 6 years when I got it. I changed the plugs a...
Forum Discussion
I think you can get at the Main Jet in that carb. We had Model BFA, a twin cylinder 4KW, and I have the manual. It included certain NH models as well. That said, I shared my ONAN carb experience in another thread. It was same as Lane Hog's. Professional ultrasonic cleaning. Probably a dozen or more years ago, but a fuel system shop was able to rebuild it with new parts. Very possibly carb parts or kits are no longer available.
Anyhow, watch for any part made of copper-colored metal. Copper promotes formation of gum when in contact with gasoline. That's part of why small engines use steel lines. Yes, they can rust, but at least they don't gum like copper would.
EDIT: I remember something about those twin cylinder engines needing to be de-carbonized periodically. I never did it, and I don't recall any details beyond ONAN selling a Snake Oil for doing it.
Anyhow, watch for any part made of copper-colored metal. Copper promotes formation of gum when in contact with gasoline. That's part of why small engines use steel lines. Yes, they can rust, but at least they don't gum like copper would.
EDIT: I remember something about those twin cylinder engines needing to be de-carbonized periodically. I never did it, and I don't recall any details beyond ONAN selling a Snake Oil for doing it.
