Recent content by Hammermechanicman

The onan engines are opposed twins

Exactly. Lots of folks assume onan engines are like most other engines.

Look at this wiring diagram from an onan engine. What happens when you disconnect a plug wire to try and run on one cylinder?

They test the internal resistance of the battery

Does the red light on the side of the right side control station when you turn the key on? There is a bulletin about replacing the engine harness under warranty. The ECM loses power because of a bad connection in the harness. Customer brought it to me and i had him take to dealer and they...

Have you done a compression or leakdown test on the engine? Disconnect one plug and start the engine. How does it run? Reconnect the first plug and Disconnect the other plug and start the engine. How does it run?