Re: 1993 Seadoo GTS have they been a reliable ski?
to do the oil block off corectly you need to pull the rotary valve cover and remove the oil pump, then place a block off plate where the oil pump goes,you also need to loop the little oil nipples on the cover together, that stops any vacume leak, just use one of the oil lines and hook it from one to the other.next you may want to add a wind to the return spring on the carb as the throttle tension will be reduced once you eliminate the oil pump, you don't want the carb to hang open unexpectidly, and you must retain the oil tank and oil in the tank to lube the rotary valve. you can just fill the 2 big hoses and loop them together but you need to keep an eye on the oil in the lines, it is best to just leave the tank and keep oil in it. the selector switches usually get clogged up and they also allow air leaks, best to toss it run from the reserve pickup off the tank