Seadoo GTX 951high idle issue

[phatbasser]

How do I adjust my throttle cable down near the carburetors. I noticed there was a barrel adjustment and two nuts on the front and rear side of the mounting bracket. Hopefully I don't have to remove the mounting bracket and loosen both nuts. Hopefully I can just loosen the front nut and turn in the barrel. Any thoughts would be appreciated.

 

[POPPS]

I believe the barrel adjustment is for your oil pump,,,put mirror there and see that the 2 marks are aligned which i suspect they will be,,,if the cabble needs adjusting,,,you will need 2 10 mm wrenches,,to loosen the jam nuts,,,you can tape the throttle lever to the handle bar,,,and loosen/tighten the nuts till you get the WOT opening that you want,,have some play before WOT so that there is no tension on the cable,,conversely,,,at idle,,,there should be a smidgeon of play so that there is no stress on the cable at rest,,,,I assuming this is not a DI,,you don't adjust them,,,they are capped.

 

[phatbasser]

Basically I'm trying to figure out why my idle is higher then before I rebuilt the carbs. I followed this thread exactly
Thread 'The Seadoo Carb Rebuild Thread'
The Seadoo Carb Rebuild Thread. I also checked the two connection points for the throttle cable ball and I verified that I slipped the ball end of the cable in the correct hole at its mounting point. So even when I backed off the idle adjustment screw all the way the idle still seems a little high. I checked that there was enough slack in the cable and when the throttle lever is depressed it seems like everything opens and closes correctly on the throttle plates. I have also set the low speed adjusters to 1 1/2 turns out as a starting point. This is my second time doing this and I had no issues with my first rebuild on my other GTX 951. Any assistance would be appreciated. I plan to check all my fuel lines as I replaced them and understand if air is getting in it could cause a higher idle.

 

[POPPS]

Its quite possible that the pulse line is binding on your throttle,,,it weaves between the carbs and can be a nusance,,turn the idle screw out so that there is no idle,,,the carb stop should not even be touching idle screw,,now look too,see that your butterflies are closed,,.then pull the throttle,,,at the bars,,,see that the butterfly arm comes back to rest,,,that will hive you a good baseline to start from...

 

[phatbasser]

Its quite possible that the pulse line is binding on your throttle,,,it weaves between the carbs and can be a nusance,,turn the idle screw out so that there is no idle,,,the carb stop should not even be touching idle screw,,now look too,see that your butterflies are closed,,.then pull the throttle,,,at the bars,,,see that the butterfly arm comes back to rest,,,that will hive you a good baseline to start from...

I completely removed the carburetors again and checked everything aside from dismantling it. Reinstalled with new gaskets checked the pulse line was not rubbing up against the throttle everything comes back to rest and when I start it it idles at around 3100 and the idle screw is completely backed off. So I am extremely puzzled at this point. I'm almost inclined to take the carburetor out and dismantle it to determine if possibly I installed the internal gaskets the wrong way but I find that hard to believe. I'm also running this on a hose right now and I know the idle would run higher but I can't even adjust it down. Any other thoughts from anyone before I move forward. Thank you

 

[POPPS]

If the butterflies are closed,,there is no way it would run,,,no air,,,so it is getting air from somewhere,,remove the carbs,,,you may have pinched base a gasket,,,or even,,,the gasket dropped to the bottom of the hull,,,happens to all of us,,,which is why i put pure original crazy glue on the edges of carb gaskets,,,the fuel is there,,,and it is gettng air from somewhere else,,,

 

[1of500]

One thing I recommend for future reference is to leave the throttle cable on the bracket and not touch it keeps you from having to adjust. Pull the carbs with the cable attached and verify that they fully close when the idle screw is backed out.

 

[phatbasser]

Thanks for your responses. Yes I did leave the throttle cable on the bracket and have never removed it. However the front nut was a little loose and I tighten it but I also noticed there was a barrel adjuster to the front of the bars Under the Hood and adjusted the slack in the throttle cable from there and that made no difference. Does the throttle cable adjustment that's mounted on the bracket do the same thing as the barrel adjuster. It would seem to me that it does. I pulled the carburetors again and made sure that the base gaskets were attached correctly. In addition, I disconnected the throttle linkage between the two carbs to verify that my throttle cable was not pulling the butterflies and the idle still sits at 3100. So where else could air be coming in from. Thanks

 

[1of500]

The barrel adjustment also effects oil pump and tps sensor

 

[phatbasser]

The barrel adjustment also effects oil pump and tps sensor

I have readjusted the barrel back to the original setting. Thank you. There is one other item I forgot to mention, the nipple on the pulse line broke and I couldn't find a replacement but I did manage to get a brass 1/8 inch angled elbow that I had professionally tapped into the cover. Could this possibly be causing less fuel flow on the pulse line and causing a lean condition? Here is a picture.

 

[phatbasser]

I believe the barrel adjustment is for your oil pump,,,put mirror there and see that the 2 marks are aligned which i suspect they will be,,,if the cabble needs adjusting,,,you will need 2 10 mm wrenches,,to loosen the jam nuts,,,you can tape the throttle lever to the handle bar,,,and loosen/tighten the nuts till you get the WOT opening that you want,,have some play before WOT so that there is no tension on the cable,,conversely,,,at idle,,,there should be a smidgeon of play so that there is no stress on the cable at rest,,,,I assuming this is not a DI,,you don't adjust them,,,they are capped.

Hello, I have my carburetors off and checked everything when I did the rebuild to make sure I had all my gaskets and orings set properly and I'm ready to reinstall. However I want to adjust the cable tension for the throttle first before I install the carburetor. I can't adjust it when it's installed as it's too tight to get in there. At this point I left the jam nuts the Way they were when I unhooked the bracket from the carburetor. Based on this picture do I move the bracket forward or backwards with the jam nuts to give me more play. I would think backward as that would push the cable forward .Thank you

 

[mikidymac]

You need to set these adjustments with the carbs installed.