Bel Air engine shuts down when unloader engaged.
I have a Kholer 14 HP 429 cc engine model number CH440 Spec number CH440-3031 on a Bel Air compressor and tank. Model number 3G3HKL. I put the unloader valve in the up position so that I can crank the engine. The engine starts and runs great until I flip the unloader valve down. This kills the engine. Please help!!