accelerator pump?

[collin1105]

I have a 2000 sea doo rx and not sure if the accelerator pump is bad or not. I will be at idle and i will pull full throttle and its kind of slow in the water till i hit about 10 mph and then it takes off awesome. i replaced the wear ring and the impeller last year. I ride in fresh water so i know the lines are fine and not breaking down. Just slow off the start and deff not how it should be. Any info would be awesome

 

[Sportster-2001-951C-Stock]

I believe you're most likely on the right track, especially if your spark plugs are fresh and properly gaped. The accelerator pump nozzles in the carb bores do tend to gum with fuel varnish over a period of time. Also IMPORTANT, if your fuel system has never been fully serviced, it's time to do it, ie: carbs rebuild and gray fuel line replacement, clean or preferably replace fuel selector valve as well and possibly clean the fuel tank if there is notable garbage in there.

Run a compression check on the engine too, I'd do this first and at least once per season to get an idea/monitor cylinder condition. You may decide not to put the work into it if the cylinder pressures are low, although these skis are well worth rebuilding and fixing up, IMO, especially if in good cosmetic condition.

http://fiche.seadoowarehouse.com/se...&make=seadoopwc&a=259&b=17&c=0&d=-CARBURETORS

 

[AdamXP800]

What makes you say just because you ride in fresh water the fuel lines aren't breaking down? What year did Seadoo stop using the tempo lines? I thought it was like 2001 or something


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[Seadoobuddy]

Fresh or salt water have no bearing what-so-ever on the Tempo fuel line breaking down. it's the gas that breaks them down and makes green goo.

You may be thinking about Salt deposits blocking the water lines, there again it has no effect on "hole shots" unless the lines are heavily blocked and the motor is overheating (buzzer should sound)

I agree with the others that you rebuild the carbs and replace the gray tempo lines(if you have them). Add an in-line fuel filter too.

 

[Sportster-2001-951C-Stock]

My '01 sportster boat still had factory Tempo gray fuel lines on it.

 

[collin1105]

I have replaced the fuel lines that run into the carb thinking that the lines were breaking down and everything was fine. I had the carb out once thinking that the lines were breaking down but the carb looked clean to me. I took the little filter out in the carb and it was clean also. I am guessing that i should just get a rebuild kit for the carb and hopefully it will be good. Let me know if you guys think that would solve it. like i said the ski runs great after about 10 mpg just off the whole shot its slow

 

[Sportster-2001-951C-Stock]

I thought that model ski has two carbs?

Well anyway, you can check your accelerator pump operation by looking straight down into the carb throat(use a mirror and flashlight?) while operating the throttle you should see(and hear) a good amount of fuel squirting out of the accelerator nozzle as you squeeze the throttle lever. After a few squeezes there won't be much fuel remaining in the carburetor chamber that feeds the acc pump, so pay close attention while watching the first and second shot.

Assuming it's a lean condition, you might also double check the low speed mixture screw settings, to make sure they're set properly. If they're too far in, you might experience a flat throttle response in the low end.

It's also possible instead, your mixture is too rich. If by pulling the choke briefly while the engine is stumbling, it suddenly perks up, that would indicate a lean condition exits but in the case it's too rich, the poor low end operation you describe can be caused by too much fuel as well (too rich), in which case there may be fuel leaking past the metering needle seat in the carburetor. Often when this is the case, the engine will also be hard to start from a hot shutdown as well, b/c fuel will continue flowing into the intake when the engine is not running.

Too rich? Since the engine doesn't immediately fall on it's face and quit when you open the throttle, this issue you describe could be excess fuel, which takes a few seconds to clear out through the cylinders once you open the throttle. Usually you would experience a rough idle, and could probably smell more than the normal amount of gasoline from the exhaust, maybe enough to quickly irritate your eyes.

Sometimes similar issues can be caused by near fouled spark plugs as well, try changing them if you haven't already. Think about when the problem first occurred, was it right after adjusting or changing something? Could be an air leak at one of the fuel line fittings, or the fuel/water separator cup o-ring isn't sealing.

Just a few more ideas of things to check for...