1997 GS fuel problem

[dte33]

First off, I am new to pwc's and this forum has been a huge help getting me fsmiliar with my seadoo and even bigger help with me working on my GS.

I have started a couple posts about replacing fuel line and my GS not stating. I wanted to start a new on with my progress and looking for some more help.

Bottom line, my seadoo will not start. The ski turns over but I have determined That it is not getting fuel. I checked/cleaned the filter up under the storage box and it is not filling up with fuel when i try to start it.

Here i what I have sone so far:
1. replaced all grey fuel lines with new lines. I didn't replace the vent lines from the baffle, they were good.
2. Checked the filter in e carb. - it's clean
3. I have spark
4. Tried both fuel on and reserve, still won't start.

Where do I look next? any help is greatly appreciated.
Thanks
Dte33

 

[LouDoo]

Check the fuel selector valve. You can bypass the valve, for testing, just run the line straight from the carb. to either the main or reserve outlet on the fuel baffle. I have not had a lot of luck cleaning the valve, I have found they usually need to be replaced.

You could also check the "O" ring on the water separator/fuel filter, right above the gas tank.

Lou

 

[bigJake]

try putting vasceline on the o-ring on the fuel filter under the hood and be careful not to crossthread it.

did you replace the fuel lines 1 at a time to make sure you put them on correctly?

open the fuel filler cap to release any pressure in case your check valve is not working.

 

[dte33]

I checked the selector valve. I used an air compressor and blew it out. There was nothing in it, both "on" and "res" were clean.
I replaced all fuel lines carefully one at a time.
I can try vaseline, I have been careful not to cross thread it too.

 

[bigJake]

well next would be to check your pulse line, but I don't really know how to do that. Lou?

 

[dte33]

Any one know how to check the pulse line on a 1997 GS?
Also, are their supposed to be vacuum lines on my carb? I have 3 fuel lines (single carb) and someone is telling me I should have a vacuum line, and that is why it isn't sucking fuel in the lines..
Thoughts?

 

[bigJake]

Any one know how to check the pulse line on a 1997 GS?
Also, are their supposed to be vacuum lines on my carb? I have 3 fuel lines (single carb) and someone is telling me I should have a vacuum line, and that is why it isn't sucking fuel in the lines..
Thoughts?

the pulse line is a vacuum line that runs from the crankcase to the mag carb, it works a plastic diaphram that draws the gas. But I don't know exactly how to test it.

 

[LouDoo]

For the lack of a better term it blows and sucks, remove the line from the carb. ground the spark plug cables, put your thumb over the end of the line, turn the engine over, it should blow and suck.

Kinda reminds me of Sis, right Jake?

Lou

 

[bigJake]

For the lack of a better term it blows and sucks, remove the line from the carb. ground the spark plug cables, put your thumb over the end of the line, turn the engine over, it should blow and suck.

Kinda reminds me of Sis, right Jake?

Lou

That's how I figured you test it- but if it is not creating vacuum, other than the line being clogged, what would be wrong?

yep, just like Sis but she doesn't have to be grounded. I remember this one while stopped at the top of a ferris wheel...

 

[LouDoo]

I'm not sure I've got the answer for that one. You might want to PM our big brother (Tony), I'm sure he'll know.

Lou

 

[bigJake]

well somebodys got to ask this just to rule it out - you do have fuel in the tank? :willy_nilly:

 

[dte33]

Ha! Good question, there is fuel in the tank, well over half a tank.

 

[dte33]

One test I just did to verify it isn't the fuel tank was I pulled the line on the filter under the hood that goes to the carb, put a short hose on it and was able to draw fuel from the tank in to the filter reservoir, both with the switch to "on" and "res". So at this point I know everything is good from the tank to the carb. So it looks like the problem is in the carb. Or the engine if that is possible..
Thoughts?

 

[bigJake]

One test I just did to verify it isn't the fuel tank was I pulled the line on the filter under the hood that goes to the carb, put a short hose on it and was able to draw fuel from the tank in to the filter reservoir, both with the switch to "on" and "res". So at this point I know everything is good from the tank to the carb. So it looks like the problem is in the carb. Or the engine if that is possible..
Thoughts?

did you verify you feel suction on the pulse line?
did you put new gaskets on the carbs when you took them off and torque to spec? sounds like you could be sucking air somewhere.

I wasn't clear on your above test. How did you "draw fuel from the tank into the filter resovoir" with the line to the carb disconnected?

 

[Dr Honda]

Hi guys,


In a post above... it said you didn't change the hoses on the baffle. Have you done that yet? When the Tempo hoses decay... the get soft, and the clamp looses it's ability to hold the hose. SO.... there is a good chance you are sucking air past on of them. Not to mention... you will just send more goo into the system.

If it was my ski... I would take the feed hose off, at the carb, and try to suck fuel out of it. You will know right away if there is an air leak, or if its plugged up.

If you get clean fuel at the feed hose... then the carb needs to come apart. You could have a ruptured pump diaphragm.

Jake an Lou's suggestion to check the pulse line is correct... but it's easier to just take the pump apart, and check it over.

 

[dte33]

I have replaced all the grey fuel lines. I did NOT however, replace the grey vent lines from the baffle. I have done what you have suggested and I am able to pull fuel from the tank to the feed hose.

I will investigate the carb nest, thanks for the help!