[Jon G]

John this came straight from a mechanic I work with. I tested my Merc [img]images/icons/frown.gif[/img] yesterday(Getting new Suzuki next week [img]images/icons/smile.gif[/img] ). Warm engine up then remove all spark plugs set the throttle to full open and then test one cylinder at a time. I was told if you find a cylinder that is low you can spray some oil in and try it again. If the reading goes up you have a ring problem( as the oil helps seal the rings temporarily) if it stays the same you have some other problem causing the loss (cracked piston, head gasket etc.)