Gregg, thanks for the info from your testing. Strange how on this forum you can get wildly varying comments/suggestions. It baffles me how I can run the ski without overtemp or lock up without premixing yet I see no oil out of the oil lines. I want to remove the oil pump for a closer inspection. How much effort is it and anything to watch out for. I have already had the carb out so I can repeat that but don't know what to expect with the oil pump. thanks.