• This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.

97 GSX bog from idle. Pop-off too low?

Status
Not open for further replies.
[video=youtube;HDbis6ldyKo]https://www.youtube.com/watch?v=HDbis6ldyKo[/video]
This is my 96 from a dead stop with 3/4 throttle.

Its not the same as the XP for sure but it does have some punch. At least enough to jump out of the water and lift the pump out of the water from a stop.
 
Last edited by a moderator:
[video=youtube;HDbis6ldyKo]https://www.youtube.com/watch?v=HDbis6ldyKo[/video]
This is my 96 from a dead stop with 3/4 throttle.

Its not the same as the XP for sure but it does have some punch. At least enough to jump out of the water and lift the pump out of the water from a stop.

This is 100% stock ?

If so I am missing something down low. Mine doesn't jump out like that.


Sent from my iPhone using Tapatalk
 
Not 100% I have .5mm overbore and a solace prop. But the prop improved other things. Still had the same punch with the stock impeler but sliped a bit while playing.

Got a video ?
 
Not 100% I have .5mm overbore and a solace prop. But the prop improved other things. Still had the same punch with the stock impeler but sliped a bit while playing.

Got a video ?

I can put one together next time I am out, just don't know when it will be.


Sent from my iPhone using Tapatalk
 
Well, and updated to this old thread:

I ended up not taking the GSX out last year, tried to make the most of my XP riding season.

I am back trying to solve this problem.

It still has a bog until it gets past 4-5000 rpm, then it runs awesome.

I think I want to remove my accel pumps and jet the carbs the same as my XP, or at least the same as what a 96 GSX would have.

What do yall think about that idea?
 
I have the same issue and would LOVE if someone solved this once and for all. I feel like I've tried EVERYTHING short of going up a jet size
 
I just realized you PM me. I still dont get PM notifications :(

I ended up leaving my odi grip ground out a bit where finger throttle contacts it so I can get WOT, and idle all the way down. I will be trying a UMI, and different grips this summer to tinker.

I would remove the accel pumps, and even try swapping a good known set of carbs.


Rob



Well, and updated to this old thread:

I ended up not taking the GSX out last year, tried to make the most of my XP riding season.

I am back trying to solve this problem.

It still has a bog until it gets past 4-5000 rpm, then it runs awesome.

I think I want to remove my accel pumps and jet the carbs the same as my XP, or at least the same as what a 96 GSX would have.

What do yall think about that idea?
 
Rich BOG / lean HESITATION

I'd rather jet one or two sizes larger than soak my carbs in caustic soda b/c I know these carbs were jetted on the hairy edge of lean to begin with. Now they're 20 years old and our fuel has changed, meanwhile the ALUMINUM transition ports have a little oxidation growth inside them, so the diameter is ever so slightly reduced.

IMO it's also okay to disable the a-pump and jet accordingly richer, I would leave the a-pump in place until I was happy with the tune b/c you might decide to enable a-pump just in case there still isn't quite enough low speed jet.

You guys did confirm your RAVES are closing as they should, right? There are some aftermarket RAVE bellows out there that aren't worth a poop b/c they hold the valves open..
 
Last edited by a moderator:
You guys did confirm your RAVES are closing as they should, right? There are some aftermarket RAVE bellows out there that aren't worth a poop b/c they hold the valves open..

I thought about that today, runs fine in the rave open rpm's. Not so good at lower rpm.

How do I verify they are opening and closing?

Edit:

This thread list the current jet sizes. Please take a look.


http://www.seadooforum.com/showthread.php?t=76855






Sent from my iPhone using Tapatalk
 
Last edited by a moderator:
Jets are available in increments of 2.5, the 65 jets are two sizes smaller than factory calibration should be? Sounds like you've got 65 jets in there where 70 jets should be. Start with 70's unless you already know they're too small, get 72.5 in case you still have a slight lean hesitation and you want to go next size over or if it's more than just slight hesitation then go up two sizes.

Low Speed Jet P/N is: N100.606-size, so you'd want N100.606-70 Good ebay item ~$5 each

I wouldn't sweat the a-pump unless initial throttle action seemed too rich and you want it a little leaner but if you want to disable it then disable the input fuel to the a-pump and leave it installed or you can remove it entirely and plug all the fittings (block fuel fitting to a-pump and a-pump injector nozzles).

Once all the tuning is dead nuts perfect, the idle mixture screw will need to be set slightly richer to compensate for no a-pump, all else equal. This keeps a tiny bit more fuel in the crankcase during idle than if there was no a-pump.

Sometimes even, the low speed jet selected is larger when no a-pump is installed. That doesn't appear to be the case for your model.... Based on that thread.

Nice thing about an a-pump is it can be used like a small primer...

If you've got the full factory setup (factory exhaust, intake manifold, RV, etc.) I'd want to run the factory jets if possible but it's okay IMO if you need to go a step or two richer than factory for cleaning up a lean hesitation. More than two larger than factory there's something wrong.

If you remove the complete RAVE you can see how far the blade extends. Fully assembled, it must extend far enough to hit the fully closed stop else it's not closing and something's causing that like the bellows is misshapen or the spring that pushes it to the extended position is the wrong one.

FWIW, SBT has been selling defective RAVE bellows for the 787 application.
 
Yeah I think so, maybe too thick or something, too stiff or whatever not sure. If the rave doesn't extend far enough in the relaxed position to hit the stop then it's not closing off the exhaust port timing will not be good for low speed operation.
 
Status
Not open for further replies.
Back
Top