In this video, I show you how to replace the breaker points and condenser on an Onan B series engine. Music Credits: Static by Ramzoid Sunshine On Sand by Unicorn Heads
This video helped me lots. The engine sounded like it wanted to tear itself apart at higher RPMs. Took the cover off and i immediately noticed the points were 2-3 times further apart than they should have been. Took 5 sticky notes and then backed it off about 1/16th of a turn and now she runs smooth. Now I have to deal with the unknown oil leak.
Thanks for the vid. I have a case 446 with the B43M. The engine starts to run rough and die after 20-30 minutes. Once cool, it is ok again. Any ideas of the cause? Also, are any of these after market parts ok to use? Any links to parts source? Thanks in Advance!
It could be a coil going bad that acts up once it gets hot. I wouldn’t go buying the cheapest parts out there though, I tend to look at the reviews of things to see if the quality is decent.
Help! I’m a little confused on the wiring for the coil. Does the condenser go on the positive or negative? What exactly is connected to the pos and neg side of the coil?
Condenser goes on the positive side of the coil. Going by the drawing, orange wire is also on the positive side and black wire is on the negative. It’s a good idea to label things before taking them apart to keep from getting mixed up.
Great video however I disagree with your answer above. The B43 motor has the condenser under the points cover and connects to the points, and the points wire goes to the NEGATIVE on the coil. The POSITIVE on the coil goes to the Time Delay Control Module. I think you were confusing the B43 motor with the P218 motor with electronic ignition.
@@rolika5520 I’ve always been able to get mine off with a small oil filter wrench without an issue. If you get it off and there isn’t really a hole in it, the leak could be at the adapter plate. See my video on that here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VbPJ4d5yFiE.html
Points and Condenser should be replaced periodically as part of normal maintenance. Your surging is is likely something else, such as a carburetor issue or intake manifold vacuum leak.
Mine weren’t necessarily bad, I replaced them more as a preventative maintenance item. They’re cheap so it can’t hurt to try that. Your issue may be coil related also.
My 1990 318 is doing the same. I've changed fuel filter, fuel pump and fuel lines and still does it. Am considering points and condensor next. Have you resolved yours?
