Thor Forums

[EA37TS]

Hey folks,

Have you looked at the Onan Installation manual that came with your coach?

My setup is different being a Challenger with a 5500 Onan. The manual requires 1/2 inch clearance on the top and sides and 12 inches unobstructed on the bottom. The storage compartment which houses my generator has no floor and is open to the outside.

If your rigs are like my Class C was, you would have to look under the coach to see if there was a bottom on the compartment. In that coach the 4000 Onan fit so tight you couldn't see the bottom of the compartment. There was no bottom on that storage compartment either. It never had an overheating problem but it did have the fuel pump problem.

Within 10 minutes you can determine where the fault lines; in the installation (Thor) or in the equipment (Onan).

By the way the 4000 fuel pump problem was caused by faulty diaphragms. Onan could never track the source of the faulty components to remove the faulty pumps from their supply chain.