1994 Seadoo XP idle reving high

[94xpseadoo]

Hey guys,

Im new to the PWC world so im still learning. I bought a 1994 Seadoo Xp (It has twin carbs) from a friend of mine who had the carbs off of it. He said he cleaned them out by letting them soak in carb cleaner for 24 hours. I put the carbs back on with new gaskets (thermostat gaskets from advance auto that fit...shocking i know) and once I had everything put back together I put gas in it. The spark plugs are new. Once I started the engine it reved up really high so I shut it down. I am starting it out of the water but just to see it idle for 15 seconds but I am having to shut it down way early cause of this reving problem. I checked the throttle cable to make sure it wasnt hung on anything. It was fine. I checked the choke cable as well to make sure it wasnt hung up. Everything seemed right. Im not sure if he messed with any of the bolts on the carb to adjust the idle. I think that is what it is but im not sure. I pulled the carbs back off of it and had a different friend look at them. He said that the diaphram on the carbs had no gas or anything. He thinks that's not normal. I have no clue. He wanted to spray them with w-d 40 and see if it would happen again once we put everything back together. I really don't feel like having to tear everything back down if it isnt it. Any advise would be great!

Thanks in advance,
Christian

 

[99spxxx]

(thermostat gaskets from advance auto that fit...shocking i know) This is your problem.. Use oem gaskets and make sure all seal are in place, because your intake is leaking somewhere.. more air means more power so air is getting in at the carb to intake and or intake to motor..

 

[94xpseadoo]

Where should I get the carb gaskets and any particular kind? The gaskets I have on there now seem to be fitting but maybe your right that air is getting in and thats causing it to rev high because its getting to much air.

 

[99spxxx]

Where should I get the carb gaskets and any particular kind? The gaskets I have on there now seem to be fitting but maybe your right that air is getting in and thats causing it to rev high because its getting to much air.

Dealer and or seadoo Source.com... Also did you take the intake off or split the intake apart you could be leaking on the big oring or the mid gasket in the intake.

 

[94xpseadoo]

I replaced a total of 4 gaskets. 2 bottom ones on the carb. and two at the top so i could get to the carb. I think that was the intake gaskets for the top two. Just so I can make sure Im not the idiot on this one...the guy I bought it from said to use thermostat gaskets...it wasnt my idea. I am having trouble trying to find the exact ones on that website. this is the exact same carb i have on there though.

http://www.ebay.com/itm/93-94-xp-65..._Watercraft_Parts&hash=item2c6372e57a&vxp=mtr

 

[94xpseadoo]

From what im finding I did take the air intake off. Do they have a gasket suppose to be in between the carburetor and the air intake base? I have looked for intake gaskets but cant find any. I wouldn't think that they would leave it metal to metal. I didn't originally take it off so i dont know what was on there before.

 

[Rotor13B]

Hey guys,

Im new to the PWC world so im still learning. I bought a 1994 Seadoo Xp (It has twin carbs) from a friend of mine who had the carbs off of it. He said he cleaned them out by letting them soak in carb cleaner for 24 hours. I put the carbs back on with new gaskets (thermostat gaskets from advance auto that fit...shocking i know) and once I had everything put back together I put gas in it. The spark plugs are new. Once I started the engine it reved up really high so I shut it down. I am starting it out of the water but just to see it idle for 15 seconds but I am having to shut it down way early cause of this reving problem. I checked the throttle cable to make sure it wasnt hung on anything. It was fine. I checked the choke cable as well to make sure it wasnt hung up. Everything seemed right. Im not sure if he messed with any of the bolts on the carb to adjust the idle. I think that is what it is but im not sure. I pulled the carbs back off of it and had a different friend look at them. He said that the diaphram on the carbs had no gas or anything. He thinks that's not normal. I have no clue. He wanted to spray them with w-d 40 and see if it would happen again once we put everything back together. I really don't feel like having to tear everything back down if it isnt it. Any advise would be great!

Thanks in advance,
Christian

What's it idleing at? 3000 rpm out of the water is normal. Once you put it in the water it'll drop down to 1000 to 1500 rpm.

 

[LouDoo]

This is going to sound crazy, but are the spark plugs in tight? There is another thread on the same subject, the guy posted a video and he was just installing the spark plugs finger tight, allowing air past the spark plugs and was running lean.

Lou

 

[94xpseadoo]

The spark plugs are tight I did check that. When I say its reving up im talking about 6000 rmps out of the water. I shut it down cause I dont want to hurt anything. Im sure that it would continue to climb if i let it. Do you think it could be coming from the gaskets? they are thermostat gaskets but they do fit. They seemed air tight.

 

[Strizzo]

did your buddy take the carbs apart before he soaked the carbs in carb cleaner, or did he just drop em in? if he just soaked them, there are a number of things the cleaner could have eaten. you'd want to pull the carbs apart to change the internal filter anyways, and if you use carb cleaner on it, it'll eat the fiber mesh of the filter. a carb rebuild is probably in order, and a quality mikuni rebuild kit should come with the carb base gaskets too.

 

[LouDoo]

Did you use anerobic sealant on the gasket before you installed the carbs. Locktite 518 I think. A thermostat gasket should work fine.

Lou

 

[94xpseadoo]

its reving up to about 6000 rmps. It sounds like as soon as you start it someone has the throttle wide open. The spark plugs are tight I double checked.

 

[94xpseadoo]

I called the dealer and they said not to use anything for the gasket. Just put the gasket on dry... are they correct?

 

[Liquid_Assets]

If both surfaces are perfect and true then a dry install is fine. I use sealant on mine as i don't like having to redo things that didn't seal properly the first time. Sounds crazy..but even left over threadlocker in bolt holes can cause issues when trying to tighten your parts down, causing leaks. Nothing ruins a great day at the beach faster!