my seadoo smokes a whole lot when turning it on for the first 5 minutes

[esther]

1994 seadoo speedster twin enginge jet boat
when I first turn on the engines they smoke like crazy, the first couple minutes when going slow through the wake zone it still smokes, it will stop when I start drivin fast.
How do i make it stop smoking so much, I think all my neighbours are already complaining about me LOL !

 

[Bills86e]

Probly used inferior oil and crankshaft seals are leaking. The only real fix is a crank replacement. Shine a light down *plug holes. Are the piston tops Black? If so, check the compression and compare to allowable in the Shop Manual. A decarbonizer may
help alittle, but low compression means all the gas is not burning in the cylinder when running. It would be black smoke. Blueish white is oil.

 

[esther]

The smoke is bluish white. Also the left engine takes a long time until it will start, i have to throttle it alot before it starts up. I don't know if it has to do with that ?