hypothedical question,say i did have a leak in the head gasket wouldnt it burn white smoke threw the exhaust like on a car,or steam?gonna run the boat tommorrow ill look and see if leaks around the gasket.theres alittle water at the bottom of the cowling is that typical?turned the idle up do i need to also adjust the pick up roller,it idles fine but when put in gear its alittle slugish or wants to stall,thanks jeff