1998 xp 951 help…..

[Mettsy]

Ok..just rebuilt the top end and had it running on those hose no problem l. Water on engine on premise. Worked fine, blipped throttle worked great.

take it down to Water test it and I backed the Sea-Doo into the water so that the pump in the back was submerged and tried to start it it would not start I pulled the plugs and I have no spark and one plug looked a little bit milky please help

 

[Mettsy]

Update***.
I have spark… I disconnected the battery to reset MPEM. Now it runs on the hose no issue..

Any advice for a trailer run with jet pump submerged?

 

[mikidymac]

Just check for leaks and that it runs then get it out in the water.

 

[Mettsy]

No leaks in engine area.

so, launch it in water then start it up…. I don’t need to start it before putting it in the water right? Stupid question maybe?

 

[mikidymac]

I like the start them on the trailer at the ramp just to be sure they are primed and ready to go.
Then put the trailer in the water and with the ski still attached stat it and check all over the engine compartment for leaks. IF no leaks then launch it and take it out.

 

[Mettsy]

Yeah makes sense…
I will start it just before it’s about to hit the water then once it’s running I’ll back it down and see what happens…

 

[POPPS]

Since its a 951 and the pipe is a super heavy awkward pain,,and,,,you said the plug was "milky",,,,my guess is that the exhaust manifold head pipe gasket is leaking,,,or,,,the cylinder head gasket is leaking,,

 

[Mettsy]

POPPS: I think it was access oil that fouled the plug… I will keep an eye out for that to happen again..

I took it back down to the dock and left it on the trailer. It stated and idled fine.. what should the idle be ? 1500??

i didn’t see any water coming from the left side like I did from the hose attachment from home… maybe I didn’t have it far enough into the water? The temp beep sounded so I shut it down.

 

[POPPS]

Idle in the water is 1500...when you back into the water on the trailor you may need to give it some throttle for the pump to pump some water out of the pisser/bleeder fitting.