1994 GTX Boggs down AT WITS END!!!

[bruceblaisdell]

I have a 1994 Seadoo GTX. It takes off like a bat out of hell then Bogs out at 3/4 to full throttle after 2 to 5 seconds. Then you can acceleralte again for another 2 to 5 seconds before it bogs out again. It runs good up to 1/2 throttle. I replaced the fuel lines, emptied and cleaned the fuel tank, replaced the baffle in the tank, rebuild the one carb, replaced with new the carb with the fuel pump, but still the same issue. Compression on clinders is great. I do not know what to do next or what to check. Can someone please help????

 

[bruceblaisdell]

1994 GTX Bogging out

I forgot to mention I cleaned all fuel filters, in the carbs and the in-line one but still same issue.

 

[Nate Surveyor]

Sounds like a fuel problem

Have you checked your pump diaphragm?

You can tap the fuel return line, and check pressure there. This will tell you a bit about the fuel system. At idle, it should have quite a bit of excess fuel.

Believe it or not, it could be low voltage. The electrical system has to send a hot spark, through COMPRESSED RICH GAS. This takes more current at throttle, than idle. Batt voltage check would be good. If the spark is not hot enough, then it could do weird stuff.

Does it do any better on reserve?

Just a few ideas.

N

 

[superdav]

I have a 1994 Seadoo GTX. It takes off like a bat out of hell then Bogs out at 3/4 to full throttle after 2 to 5 seconds. Then you can acceleralte again for another 2 to 5 seconds before it bogs out again. It runs good up to 1/2 throttle. I replaced the fuel lines, emptied and cleaned the fuel tank, replaced the baffle in the tank, rebuild the one carb, replaced with new the carb with the fuel pump, but still the same issue. Compression on clinders is great. I do not know what to do next or what to check. Can someone please help????

I am having the same issue with my 1995 xp with the rotax 717 engine. I have done all the same things and even checked the timing. It runs the same even if you have it on reserve. I have checked the plugs and they do seem a little black but not fouled. Could the rev limiter have something to do with it?

 

[Nate Surveyor]

Just one little air leak in the carb, or a pin hole in a seal, or O ring, or a tiny hole in a diaphragm will do it.

I'd kit the carb, and then make a clear spot (insert clear fuel line) into the return line, to look for air bubbles.

IF it ain't doin right, something is wrong!

N

 

[bruceblaisdell]

Thanks Nate

Thanks for the help Nate. I will insert clear fuel line in the return line. Are air bubbles bad? and what should happen at full throttle. Also how do I check the spark?

 

[Nate Surveyor]

With a clear spot in the return line, you should not be seeing air bubbles, when all is operating right. You might see a few, right at start up, but they should stop. If they continue, you are sucking air, probably between the pump and the tank.

All this does is assure you that you are not sucking air.

My approach is simply eliminate each item as you go.

I'd order carb kit, or kits. Mine just has one carburetor. I have the 717 engine like Superdav.

My method of checking the spark is not very sophisticated, and will not find all the troubles, but you can find NO SPARK, and WEAK SPARK conditions with it.

Remove plugs, and insert the plug wire on them. Ground out the threaded part, to the head, (unpainted part) and turn it over, watching for spark.

This will not find everything, but you can do it, without spending money!

I can't help much more than this, but I would do this much.

BTW, do NOT do this around any gas vapors. You can get blown up like that. I suggest a nice fan to blow while doing this, and if you smell any gas, DON'T DO THIS!

N

 

[timmyboy76]

superdav/bruce..any luck...

 

[Nate Surveyor]

Maybe clogged tank vent?

Loosen gas cap, and see if it helps. Don't loose the gas cap!

N