1996 Seadoo XP jetting

[SIMPLEARKANSAN]

Tore into the carbs and made notes of the Jets and seats. The previous owner installed an aftermarket flame arrestor, deleted the choke and installed a primer. Right now it has 1.5 seats, 140 high speed jet and 80 low speed jet. Not sure what springs are being used, but they don’t appear to be the black springs. So after all that, shouldn’t I have different jetting for the aftermarket flame arrestor?

 

[mikidymac]

You can’t use the stock jetting with your modifications.
@Matt Braley should have a good starting point for you.

 

[SIMPLEARKANSAN]

Thanks. That’s what I was thinking also from the threads I have read. Hopefully he’ll see this post and if not I’ll contact him.

 

[Matt Braley]

It seems set up pretty well to me. Once it's all cleaned up it should run good.

 

[SIMPLEARKANSAN]

Thanks, I was afraid with the flame arrestor, I may need to increase size of seats and jets.

 

[Paul Bretz]

So it has smaller main jet and bigger low speed jet than stock with aftermarket flame arrestors?

 

[Matt Braley]

At wide open throttle it's drawing in fuel from both jets. Your overall jetting is still 7.5 greater then stock 96 787 jetting. You can always open the high speed needles 1/4-1/2 for piece of mind.

 

[SIMPLEARKANSAN]

Thanks. Appreciate your help. I’ll happily re-build with current set up.

 

[SIMPLEARKANSAN]

So with the current set up what kind of pop off pressure should I try to get?

 

[Matt Braley]

I'd put those springs in or new versions of them. Some fresh 1.5 needle and seats would be nice. Normally you would lower pop off with an aftermarket filter but going 10 up on the low speed jets was the way they were getting there. Try it and if it has a lean bog when you stab the throttle from idle that you can't get out by opening the low speed adjusters then you can always change springs to lower pop off then.

 

[SIMPLEARKANSAN]

Ok. Thanks again