So I put some fuel cleaner in which restored some power and temps started to return to normal. I figured it was bad fuel but now this morning I wake up to the fuel water separator being empty and I had yo prime the engine. It runs fine with full power but I have to keep priming thr motor if I turn it off. No hard starts or misfires. The separator is also empty while running as well.
Still probably getting air in there which causes the fuel to drain back. Check all your voss fittings on the suction side, including tank fitting o-rings. Worst case you have a cracked stand pipe on the tank.