ok i just picked up a 93 750ss the guy said it was sitting for 3 years so i brought it home cleaned out the carb and everything looked good, found out that the oil injection has been disconnected and no block off plate was installed, which is ok because i wanted to run premix anyway. Do you need the block off plate? And the ski is also not pulling fuel from the tank it will only run of the gas i pour down the intake. I dont know much about skis but i feel like something might be wrong with the pulse lines from the crank which i guess pulls the gas from the tank correct? and it runs great otherwise. Any ideas? Would not having an oil injector block off plate be the problem, all hose were taken off i know there was two.