skydivemark
Well-known member
Mounted the additional fuel pump to the inside of the chassis frame a few feet forward of the rear axle.My thoughts are vaporlock, I've been told by cummins/Onan tech rep that the 4ky is good at running in hot temps. I had a similar issue so I added a second fuel pump back near the fuel tank - problem solved.
Also added a vent to help get cooler air from outside.