WorkInProgress
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HI I'm a new member just signed up now. and I have a problem with my jetski and could use some help.
I have a 97 seadoo gts with the 717 engine and single carb and my accelerator pump isn't working.
A little history, I bought the jetski about 6 months ago its my first one ever. it sat unused for about 7 years because the carbon seal went out and the guy never got around to fixing it so I bought the jetski and replaced the carbon seal and all related parts and rebuilt the jetpump. the carb on the machine was broken and cracked almost in 2 so I bought a different carb off ebay that was posted as being for my machine but arrived with a tag saying removed from a GSX and it has a accelerator pump which my old carb didn't have. I rebuilt the ebay carb and pressure and pop off tested the carb and installed a new accelerator pump diaphragm and all was going good everything was perfect for about 1 month and I screwed up somehow and my jetski ingested a bolt down the carb throat while running WOT and did a bunch of engine damage and I had to replace the engine block with a low hour one on ebay, a rebuilt crankshaft from SBT, a new 159 degree rotary valve and good condition new rotary cover and all new engine seals but I reused my top end.
all is back together and working good with good power except its slow on the take off. when I go from idle to WOT it hesitates. basically like I floor it, and it stays at idle for about the count of 3 then it takes off like a rocket. turns out my accelerator pump is not squirting which is probably my whole problem I'm pretty sure.
the accelerator pump jet in the carb throat is clear, the hoses are new and clear. if I have the ski running and I manually push the diaphragm of the accelerator pump it doesn't squirt either so I'm pretty sure adjustment is not the problem, the hose after the pump leading to the jet is dry, no evidence of fuel, take off the line going from the carb to the accelerator pump and it has a good steady stream of fuel flowing out of it. so fuel is getting to the accelerator pump just not getting past it. should It have any real pressure coming out of that hose or does it just need flow? its basically flowing out like its gravity feeding out of the carb. is that normal or should it really be squirting out the hose before the accelerator pump?
as I stated before this is my first jetski so I wasn't very familiar with rotary valve engines until I rebuilt this one :thumbsup: mostly I'm trying to figure out if I should have real pressure coming out of the hose going to the accelerator pump or is just good flow good enough? I am not really familiar with how the accelerator pump should operate other than it should be squirting into the carb on first throttle but its not.
thanks in advance guys
I have a 97 seadoo gts with the 717 engine and single carb and my accelerator pump isn't working.
A little history, I bought the jetski about 6 months ago its my first one ever. it sat unused for about 7 years because the carbon seal went out and the guy never got around to fixing it so I bought the jetski and replaced the carbon seal and all related parts and rebuilt the jetpump. the carb on the machine was broken and cracked almost in 2 so I bought a different carb off ebay that was posted as being for my machine but arrived with a tag saying removed from a GSX and it has a accelerator pump which my old carb didn't have. I rebuilt the ebay carb and pressure and pop off tested the carb and installed a new accelerator pump diaphragm and all was going good everything was perfect for about 1 month and I screwed up somehow and my jetski ingested a bolt down the carb throat while running WOT and did a bunch of engine damage and I had to replace the engine block with a low hour one on ebay, a rebuilt crankshaft from SBT, a new 159 degree rotary valve and good condition new rotary cover and all new engine seals but I reused my top end.
all is back together and working good with good power except its slow on the take off. when I go from idle to WOT it hesitates. basically like I floor it, and it stays at idle for about the count of 3 then it takes off like a rocket. turns out my accelerator pump is not squirting which is probably my whole problem I'm pretty sure.
the accelerator pump jet in the carb throat is clear, the hoses are new and clear. if I have the ski running and I manually push the diaphragm of the accelerator pump it doesn't squirt either so I'm pretty sure adjustment is not the problem, the hose after the pump leading to the jet is dry, no evidence of fuel, take off the line going from the carb to the accelerator pump and it has a good steady stream of fuel flowing out of it. so fuel is getting to the accelerator pump just not getting past it. should It have any real pressure coming out of that hose or does it just need flow? its basically flowing out like its gravity feeding out of the carb. is that normal or should it really be squirting out the hose before the accelerator pump?
as I stated before this is my first jetski so I wasn't very familiar with rotary valve engines until I rebuilt this one :thumbsup: mostly I'm trying to figure out if I should have real pressure coming out of the hose going to the accelerator pump or is just good flow good enough? I am not really familiar with how the accelerator pump should operate other than it should be squirting into the carb on first throttle but its not.
thanks in advance guys