95GTX runs on trailer but stalls in the water

[s4webster]

Hey guys - I'm a new PWC owner (1995 GTX) and just took her out for a shakedown cruise. I started it on the trailer and it seems to run strong but when I put it in the water it starts and then after 30-45 seconds it stalls out. Wait a few minutes and it will start and then stall again the same. I have fresh gas (with Sta-Bil) and fresh oil. New BR8 plugs as well. Any help would be appreciated!!

 

[Bills86e]

If it has grey tempo fuel lines & aluminum fuel selector valve, throw'm out.
What is the compression?

 

[s4webster]

Haven't checked compression yet. Plan on doing that this week. It does have gray fuel lines.

 

[Bills86e]

You could try turning out the low speed adjuster on each carb 1/8th turn to richen
it up. You'd have to take the airbox & flame arrestor plate to get to them.

 

[s4webster]

OK - checked compression. 140 on one cylinder and 135 on the other. Also, I have been using the gas shutoff - not sure if previous owner ever did.

Thanks!

 

[Dr Honda]

It's a little low... but in the running zone.

I'd say you just need to check the cooling lines, change the gray fuel lines, and clean the carbs.

 

[s4webster]

Changed fuel lines and cleaned gas shut off valve - finally got a chance to test it out and :hurray: we are in business! Ski took off and seemed to run strong except at full throttle. When i pushed it to full throttle the engine started to stall. I never got a chance to clean the carbs. Can I use a fuel additive to try to clean it out or do I have a different problem?

Thanks again!!

 

[Bills86e]

NO, you need to open the carbs. Replace N/S, clean, install oem kit. Bill

 

[s4webster]

Sorry - what is N/S and what kind of OEM kit?

 

[Bills86e]

Original Mikuni carburetor rebuild kits, (aftermarket kits suck) needles & seats. Read
up & DIY or remove and have a Pro do them for you. They need to be done. Bills86e