Running Problems!

[welly]

hi i have bought my husband a seadoo jet ski for his christmas pressie it is a 96 and has had an engine rebuild he has taken it out twice and it starts but has no power once on the water this is his first jet ski and it has been suggested that the mixture it to rich and needs to be reduced then another sugesstion is to remove oil pump and mix the oil and petrol himself in the fuel tank any help would be so helpful as i would live to see this jet ski running before christmas!!!!

 

[Nate Surveyor]

Well, your husbands ski could have a dozen things wrong. And, at the risk of sounding like an old geezer, IF it does not yet have the GRAY fuel lines replaced, then they will have to be replaced, and all the fuel filters cleaned, and the fuel select valve cleaned out. The gray fuel lines deteriorated into the fuel, and clog everything.

25 ft of line, and about 15 stainless steel clamps

Nate

 

[seadoosnipe]

description....?

There are many people here who'd love to help you but your info is a little sketchy.

With out more info, it will be hard to diagnose. One thing I'm wondering is, you said it starts but has no power on the water. It's a 96 model so I'm wondering if you mean, it starts well and runs up on the rev limiter but goes no where........if this is the case, then your wearing ring my be in need of replacement.........

So, with more info, we may be of better help.....:cheers:

And what a good wife you are to buy your hubby a PWC!.....mine still buys me socks!.......as if I ain't got a drawer full of them now.

 

[Nate Surveyor]

Hey, Mr Snipe! My wife married me for my socks! I was a batchelor, and I hated to do laundry. So, I'd get low on socks, and buy another 12 pack... She came from a family with 8 kids, and they were always low on socks, and I had an abundance, and as they say, the rest is history!

(We will now return to your regularly scheduled program of helping the hubby with his great new toy!)

OK, Mrs Welly,
A sea doo is some sort of a complex mix of motorcycle, boat, and car motor. They are just different than most other motors. Thus, you can easily run up alot of bills with the local sea doo place, because they are a specialty craft. Therefore, you can likely save some money by posting a detailed description of what is happening with hubby's ski. The knowledge you gain here, can help you determine what you are doing when discussing it with a sea doo shop, or fixing it yourself. Either way, it is a win, to get a bit of knowledge of what is going on.
Others helped me so nicely, that I stuck around to assist others. My help is sometimes feeble, but it is free!



Nate

 

[welly]

still has running problems

thank you for your replys i will try and be a bit more helpful! this is all new to me you can start the jet ski on the trailer before it goes in the water when you put it into the water running, when working the throttle the engine will not pick up, if the engine stalls it will not start on the water you have to take the ski out of the water to start it again ,:reddevil: engine cranking is fine but the engine wont fire until you remove it far enough that the jet is out of the water
i hope this is a bit more helpful!! thanks for all your help
have ordered a seadoo manual for johns spi will be here tomorrow! jet ski shop charges £40 hour to look at the ski could be another option just want hubby to ride the ski in the water!!!!!!!!!!!!

 

[welly]

thanks a bunch! john is going to bring his compression thingy home tomorrow and check it out thank you all for all the help and will keep you informed i was feeling a bit :banghead:until i got on here you all deserve a :cheers: big time!!!!i just look forward to seeing john :driving:

 

[welly]

hello all! compression test done 125-140 on each cylinder :hurray: so thats a good start manual arrived today for him so he will have a read lol :hurray: thinking about leaving it until the new year now before booking it into main dealers cash is not endless :ack: so that is the state of things at the moment!!! thanks to all for all your help i hope we can do something for someone one day :hurray:

 

[Dans97challenger]

If you have one cylinder at 125 and the other at 140 that is a bad thing!!! They shouldn't be more than a few PSI off at most 6-7. With that being 15psi difference the motor is very unbalanced and could cause major problems.

 

[Nate Surveyor]

:agree: With Dan, above.

I can even comment that is is DUE for a top end rebuild. (Before you doo that, be sure and re-check it, and be SURE that the compression checker was sealed well, and not leaking around the threads).

Sometimes, if you doo the top end now, you can save the bottom end, and that could be cheaper. IF those numbers are real, it is like having a horse and a mule TOGETHER in a harness, pulling a chariot. The two are going to be working against each other. Can tear the motor apart.

So, for starters, IF one side has a bit of excess oil, from the rotary valve in it, then it could result in those nums. So, remove the spark plugs, and crank it over, looking to see if any oil comes out FIRST, then recheck compression. (This is to be real sure of what is going on).

OR, you could crank it up, and let it run for a minute, shut her down, and recheck compression.

Nate

 

[Dans97challenger]

Just to give you an idea on my Challenger boat the compression is 110 and 112. That is an idea of a well balanced motor. Granted this is going to be my last season with it before I have to do a top end rebuild. That will come next winter for sure. If you hit 100psi it is easily time for a rebuild. 150psi is like new or should we say perfect.

 

[WaterRat]

I've used SBT for my topend rebuilds and have never had a problem. Great price and good customer service as well.