Just rebuilt the carburetor on my GTS with the single carb mounted on the 717 motor. I used the OEM Mikuni kit. Starts and runs momentarily and will die unless I pull the choke. I can keep it running by doing that. I changed all lines (one at a time) and replaced the fuel selector. I did try to run it in the reserve position with no improvement. The carburetor tests passed including pop-off post rebuild. Used the original spring along with the needle and seat. I missed something and could sure use some suggestions please. Thx.
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2001 GTS won’t stay running after carb rebuild
- Thread starter SW MO Guy
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Hi Popps:
Pulse line is secure. But I will revisit that area. Not sure how to check if bowl is full? Symptom for carb rebuild was that it was very difficult to start ski.
I suspect pop off. It finally popped off at 38, but I sure had extreme back pressure at that point. My SBT pump wouldn’t release plunger to get more air near the pop off value, like there was vacuum? I don’t know. Seems like it runs, then starves?
Thanks again Popps.
You appear to have fuel delivery issues,,,the fuel bowl will be at the front of the ski under the steering unit,,,remove your front bin etc to get at it,,,unscrew it,,,it should be full of fuel,,,if yes,,,then your fuel issues are down stream to the carb,,,,when you reattach it,,,start it gently,,,those plastic threads are easy to strip.,,,if that bowl is not full,,,you could have a crack in the pickup of the baffle,,,(rare),,or a partially blocked fuel selector,,,common,,but not for a newer ski like yours...,Did you check your "clear check"valves on the pulse/pump side of the carb,,,when you pressurized the pump,,,does it leak,,,make sure of course that the return line is plugged off,,,you can put soapy water on the carb,,,or even submerge it in water.
Hi Popps:
Thanks. Yes, fuel bowl/filter is full and clean. Check valves are seated properly and hold pressure. I went back through the carburetor today and all appears proper, but still no luck. Fires and starts, then dies within seconds. All lines are new and I did remove one line at a time when replacing. i selector is new and I believe fuel tank is venting through the check valve through the hull as it should. Also, pressure relief appears to be working too.
I believe you’re spot on with the fuel delivery issue….just having trouble chasing the issue. How can I test delivery at the inlet of the carburetor? If I pull the line, should there be residual fuel that runs out? I would think there would be gravity in play from the bowl to the inlet of the carburetor and fuel should be there. I don’t remember it coming out of the line when I disconnected it today?
Thanks again Popps.
Thanks. Yes, fuel bowl/filter is full and clean. Check valves are seated properly and hold pressure. I went back through the carburetor today and all appears proper, but still no luck. Fires and starts, then dies within seconds. All lines are new and I did remove one line at a time when replacing. i selector is new and I believe fuel tank is venting through the check valve through the hull as it should. Also, pressure relief appears to be working too.
I believe you’re spot on with the fuel delivery issue….just having trouble chasing the issue. How can I test delivery at the inlet of the carburetor? If I pull the line, should there be residual fuel that runs out? I would think there would be gravity in play from the bowl to the inlet of the carburetor and fuel should be there. I don’t remember it coming out of the line when I disconnected it today?
Thanks again Popps.
I’ve gone back though the carburetor and checked all gaskets and pressure tests including pop off. Still starts momentarily and then dies. I can flip the choke and keep it running a few seconds more. Bypassed fuel system and still no luck. I must have overlooked something within the carburetor?
Are the in and return hoses backwars/reversed?,,,If you pour some premix in the cylinders, does fire quickly?,,,is the pulse line secure at the motor and at the carb?,,,okay,,,to rule out a plugged fuel selector,,,did you run a line from the fuel pickup directly to the carb?,,if that works,,,then the fuel selector is the the culprit,,,,,if still starving,,,,run gas to the carb from a separate external container,,,if that works,,,the fuel baffle is the culprit,,,is cracked,,,maybe you have the inline to the carb,,,connected to the vent or return nipple at the fuel baffle?,,,it will be something stupid or rare,,,like a cracked fuel pickup...
Okay Popps and 1of500:
You both have helped me a great deal. I really have to take a micro look at everything. It’ll be something simple I’ve overlooked. I will review again the sticky on the rebuild and check all fuel lines for tightness and accuracy of connections. Thanks again!
You both have helped me a great deal. I really have to take a micro look at everything. It’ll be something simple I’ve overlooked. I will review again the sticky on the rebuild and check all fuel lines for tightness and accuracy of connections. Thanks again!
Follow this exactly if you haven't.
Seadoo Carb Rebuild Thread.
Seadoo Carb Rebuild Thread.
Not 5 min. ago did I reread your initial rebuild post…I really feel that my problem is in the carburetor body somewhere. I will slow down and be more diligent this time. If I don’t find the issue with your degree of detail in your post by following it pic by pic, I’ll be real surprised. Stay tuned! Thanks again for everyone’s help and patience!
Thanks everyone! I cleaned the low speed circuit again by shooting carb cleaner through the pilot jet opening with the pilot jet removed. (Thank you 1of500!). I also replaced the pulse line which I believe to be original. (Thanks Popps). It started right up and I’ll do some fine tuning at the lake, if needed. Also, the carb rebuild thread is super. Read it twice and then scroll through it as you’re rebuilding. Thank you Mikidymac!
Might sound weird, but check your plugs. I was having issues with fuel, would run by squirting fuel in the carbs, then die. Had the carbs rebuilt, did the same thing. Was pulling my hair out, swapped out plugs, they were fouled, and now it runs great. Not sure why it would run squirting fuel in, but it did….
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