2003 Seadoo GTI LE - Starts & Idles but won't accelerate

[buckwheat12n]

I'm having an issue with a 2003 Seadoo GTI LE. The unit starts up and idles great but when I press the throttle it starts to rev slightly and then dies unless I let of the throttle. The last few times I've had the ski out, after starting it, it would bog for a few minutes and then run fine for 15 or 20 minutes and then bog again. This would happen off/on randomly. It's now just not running right at all.

I've done the following:
Drained the gas and put in new gas.
Replaced the spark plugs (they were a little black/fouled)
I played with the choke while it was idling and it did not positively affect the issue.
Checked the filter inside the carb (its was clean/spotless)
Checked the filter inside the engine compartment (it was clean)
Visually checked inside the carb, it was clean, no gunk/spotless.
Looked over the fuel lines, they look ok.

Could a bad rectifier possibly cause my issue? I read somewhere that a symptom of a bad rectifier is a drain on the battery, I have noticed that my battery is draining completely over a few days if I don't disconnect the terminals. Anyway to test it? Any other things I should look into at this point?

Any input would be appreciated.

 

[Ckrawiec]

I'm having an issue with a 2003 Seadoo GTI LE. The unit starts up and idles great but when I press the throttle it starts to rev slightly and then dies unless I let of the throttle. The last few times I've had the ski out, after starting it, it would bog for a few minutes and then run fine for 15 or 20 minutes and then bog again. This would happen off/on randomly. It's now just not running right at all.

I've done the following:
Drained the gas and put in new gas.
Replaced the spark plugs (they were a little black/fouled)
I played with the choke while it was idling and it did not positively affect the issue.
Checked the filter inside the carb (its was clean/spotless)
Checked the filter inside the engine compartment (it was clean)
Visually checked inside the carb, it was clean, no gunk/spotless.
Looked over the fuel lines, they look ok.

Could a bad rectifier possibly cause my issue? I read somewhere that a symptom of a bad rectifier is a drain on the battery, I have noticed that my battery is draining completely over a few days if I don't disconnect the terminals. Anyway to test it? Any other things I should look into at this point?

Any input would be appreciated.

2003 machine = 16 years old....I'd say time for a carb rebuild using only genuine mikuni carb kits.
If the battery is draining while in use....that points to a bad rectifier.....simple test is to meter the battery while the ski is running...if you don't see 13.5 + VDC pretty steady...that's a possible sign the rectifier is bad OR the Stator is not putting out AC voltage (which the rectifier converts over to DC).....start with the battery test

 

[buckwheat12n]

The battery does seem to stay charged while running, it's discharging slowly over a few days while sitting.

 

[Ckrawiec]

The battery does seem to stay charged while running, it's discharging slowly over a few days while sitting.

Hmmmmmm...shouldn't necessarily do that......I've left my skis or boats unstarted for weeks sometimes and they always start right up.......you might have a short somewhere in the wiring, draining down the battery.....time to start checking everything out.

 

[buckwheat12n]

UPDATE:

I bought and installed a rebuild kit (Mikuni) for the carb but still having the issue. Starts great, idles great, I can flick the throttle and it revs for just an instant and the dies down almost to a stall and then slowly the rpm's build back up to normal idle speed. It seems to initially have the fuel it needs but then starves out once the throttle is pressed and then takes a few seconds to build the pressure back up to allow it to idle.

 

[mikidymac]

Did you replace the fuel selector and strainer?
Did you follow th carb rebuild thread and check pop-off and leak down?

 

[buckwheat12n]

I'll have to look into those. I did check the strainer/filter under the seat and it was clean if that's what you're referring to. I'm might also pull the fuel pump and check the filter there.

 

[mikidymac]

You only have the strainer and the little filters in the carbs.

There’s no pump and filter.

The o-rings leak on the strainer and the selectors go bad too.

 

[buckwheat12n]

Looking at a parts diagram it shows pump with a filter below (#22) is this incorrect? Also, where would the strainer be located just so I'm looking at the same part you're describing? Thanks

 

[mikidymac]

That’s just the pickup with the fuel gauge. There’s no pump in it.

The strainer is the white plastic filter mounted above the fuel tank.

 

[buckwheat12n]

Ok, thanks for clarifying

 

[benjilafouine]

I wonder if rotary valve is not out of alignment however I don't know if this can happen without some manipulation. I have the same ski, it is very simple. Have you tried "jerking" slowly and gradually the throttle to see if it will pickup speed?

 

[buckwheat12n]

I checked the strainer, there was a very small amount of black particles in the bottom of the canister it sits in. Prior to the carb rebuild I did check the strainer and didn't notice any particles floating around at that time.

I dumped the particles out and put the canister back together and then took the fuel selector switch completely apart and sprayed it out with carb cleaner. I put it back together started it up and it ran perfect (no bogging at all) for about 30 seconds to a minute, then stalled. I started it back up and it started running poorly again. I shut it off, pulled the canister off and there was now a lot more of the black particle in the canister (see pic). Any ideas?

 

[POPPS]

After having seen the black junk in your fuel/water separator, I would remove the on and reserve lines at the pick up,(one at a time), remove your gas cap, and take a suitable length of 1/4 inch hose, and gently blow into the fittings using your mouth. Don't use compressed air, it could blow the screen right off. It is possible, that the screen at the base of your pickup is clogged with this black mush.

 

[jts32]

Probably the guts of your fuel selector. It is something that needs to be replaced, tearing them apart and cleaning them doesn't work. You can try running a fuel line from the fuel pick up directly to the carb and see if it runs good.

 

[benjilafouine]

Looks like you have a hose or a fitting breaking (cracking). I have the exact same ski and believe me, this is "not" normal. The strainer is the first line of defense after the gas tank so first step would be to check the hose going to the strainer and the fuel selector (try to put it on reserve to see if it does any good).

On mine the most I usually get are a few grains of sand but very little. If these pieces are plastic or rubber I have no doubt that it will get your carb clogged. Unless the gas tank has a huge deposit at the bottom that you could not drain.

Is this ski new to you?

 

[jts32]

Actually just to be safe, take the on line off the fuel selector and put it on the in line of the strainer, just in case it is junk coming from the tank it won't make it to the carbs

 

[mikidymac]

Replace the selector, cleaning doesn’t work.

 

[buckwheat12n]

At this point I'll definitely buy another fuel selector switch and most likely new fuel lines from the pickup to the switch/strainer and go from there.

 

[mikidymac]

Only oem. Some of the aftermarket stuff is junk.

 

[buckwheat12n]

I replaced the fuel selector switch along with the fuel lines going from the pickup to the switch and strainer.

I also pulled the pickup out of the gas tank and inspected it and the screen (it was clean) also no debris in the tank.

Unfortunately, still having the issue.

I also double checked the strainer basket after running the ski for a few minutes and it was clean. I also pulled off the top portion of the strainer basket and cleaned it and also pulled the filter in the carb just to double check that no junk was in it, it was clean. so I at least took care of the gunk.

I'm wondering if either of the two check valves that come off one of the lines from the pickup could play any part in the issue I'm having?

 

[mikidymac]

The pickup doesn’t have any check valves, they are just plastic tubes.

 

[buckwheat12n]

Are there not two check valves that run off of a line coming from the pickup? The line runs from the top of the pickup up toward the front portion of the ski and then tees off. See #33 & #35 below.

 

[mikidymac]

Those are just vent lines for the tank so it doesn't build up too much pressure or vacuum. They do not touch the fuel.

 

[mikidymac]

Did you replace the needle and seat? Did you replace the spring and check pop-off and leak down? IS the accelerator pump squirting fuel?