Goes great first 45sec then its a dog

[Xtremmarine]

I got a 1991 SP with a 580 yellow motor runs great but after about 60sec in the water it dogs down and goes 5mph wide open then wont idle but starts rite up its really got me baffled any glues

 

[kustomkarl]

It sounds like you need to remove the carburetors and clean them. If you're careful and don't tear or damage the diaphragms you won't need to buy a rebuild kit. Pay attention to the internal filters too. If you have gray fuel lines you need to replace them with black fuel lines available from auto parts stores like Auto Zone. Measure the length you need and bring a sample with you so you get the correct size. Replace one at a time so you don’t get them mixed up. If you need clamps replace them too. Use small stainless steel clamps also from the auto parts store.
I hope this helps.

Karl

 

[JPX]

You should consider signing up as a Premium Member for exclusive access to the shop manuals for these boats.

Since you have Seadoos that are coming on to 20 years of age, these manuals will be a great resource for repairs or maintenance that they most likely will need.

Certainly will be useful for the carb rebuild that Karl recommends. For a glimpse of what is needed for a carb cleaning/rebuild, click here-> http://seadooforum.com/showthread.php?t=5563