You get a small propane torch...the ones with the throwaway cylinders... You start the engine and place a hose on the end of the torch then without lighting it you turn it on and move the hose which is leaking propane all around the gaskets and hoses. If there is an air leak anywhere the engine will gain rpm and smooth out when the propane enters the leak.. Many leaks have been found thisaway.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

professional bovine relocation specialist