tweco

i just took my jetski out of winter storage and the engine loses power and starts reving up and down above about 5000 rpms. it goes to 6000 then back to 5000 over and over. also the oil light is on (oil tank is full). i already changed the fuel filter. anyone have any ideas?

PROFILE

Is it carb or fuel injected? If its a carb motor, the mikuni carbs have a small fuel filter in them under the fuel pump. I'd say they are probably partially gummed up. You must remove the carbs and disassemble to get at them.
Jeff

tweco

i got the airbox off but i was afraid to take the carbs off because of all the cables connected to them. i have some chemtool carb cleaner that says all i need to do is spray it in to the "fuel bowl vent tube" for 20sec. does anyone know where that tube is on the carb?

kaama82

iTrader: (1)

To clean carbs correctly, you need to remove and disassemble. Don't be afraid it only nuts and bolts

BUIZILLA

fuel pump...

phragle

iTrader: (3)

common problem with older seadoos..they used cheap fuel lines from the factory, over time they start to degrade and start gumming up carbs etc. if its the fuel filter or the little filter screen in the carb, I would replace the fuel lines with decent stuff while your at it

mountainstone

Dunno which engine that thing has; if it has RAVE valves you should clean them (easy to do). Change your plugs also (use the correct NGK plugs). The oil injection system has an inline filter, you might consider changing that - just make absolutely certain you bleed all the air outta the lines before starting it.

cbeastwood

You don't seem to know much about your ski. Try www.sea-doo.net - there is lots of good information there on this ski.

tweco

ok i got the carbs off. it wasn't that hard. but now what do i do? what parts do i spray with carb cleaner? do i take apart the fuel pumps? do i lubricate some of the parts?

BUIZILLA

locate the fuel inlet nipple.... remove the 4 screw cover for the fuel pump diaphram, and the clear disc, and rubber boot, locate the inlet screen and check it for debris, they ALWAYS clog up... check the diaphram itself, and the popoff valve.