1997 GSX Won't Start in Water

[sgibson]

Could the fuel selector valve cause that issues because that is the only thing I haven't replaced? @mikidymac

 

[sgibson]

Also, do you know where I can find the stock settings because the manual only gives the stock settings for the low-speed screw? @mikidymac

 

[jts32]

Stock settings are low speed-1 turn, High mag-0, high pto-1/2

Sea Doo PWC Carburetor Reference

 

[sgibson]

Oh sweet I didn't even know about this website thank you! @jts32 I will tune to those settings.

 

[jts32]

You may have to do a little fine tuning on the water to get a smooth idle at 1500rpm, but stock settings should get you very close.

I would also replace the fuel selector, as that sounds like the only component in the fuel system you haven't already replaced.

 

[sgibson]

Yeah just put one on order from the website up at the top of the screen so I don't get another weird one. Everything else on this ski except the motor has been replaced literally lol.

Thank you again! @jts32

As well as all the previous help couldn't have done it without you guys!

I will update as soon as I tune the carbs. Might be a few days.
I will continue to use the old selector until I get the new one, unfortunately.

 

[mikidymac]

If that selector is leaking air which isn't uncommon on "cleaned" old new you are risking seizing your engine.

 

[sgibson]

That's good to know I'll leave my ski on the trailer for now then! Not risking an engine for a $32 part...

Thank you @mikidymac

 

[sgibson]

Just so you guys know I also got a genuine carb rebuild kit from bayareapowersports so I know the carbs are redone correctly and with OEM. So I will probably be working on that this weekend. Also got the needle valve's and seats too.

 

[mikidymac]

Perfect, just don't use the springs from the kits.
Also test pop-off and leak down to "check your work".

 

[sgibson]

What's bad about the springs just curious? It's genuine Mikuni parts.

How do I do those tests? @mikidymac

 

[mikidymac]

The springs in the kits are wrong for the seadoo carbs., your springs should be black or dark army green. If not you need to order new 80 gram springs.

Read all of this before starting..Carb Rebuild Thread.

 

[sgibson]

Oh can you get those from like amazon or ebay or is it special? @mikidymac

And will do thank you!

 

[sgibson]

Would this work? @mikidymac

 

[mikidymac]

yes, as long as they are actual mikuni parts not aftermarket.

 

[sgibson]

Okay cool. They are on order. I checked the reviews and multiple people said it was a factory part. @mikidymac

 

[sgibson]

I know what I will be doing this weekend...

Do I need both of these kits or just one for both carbs? @mikidymac

 

[sgibson]

I would imagine both but want to double-check.

 

[sgibson]

Alright, Guys update,

So I rebuilt the carbs and followed the rebuild carb thread to a tee. I also changed the spark plugs as the old ones were very black on the tips. I put the carbs to stock tuning the fine-tuned them from there.

Idle screw: 4 turns out from seat
Low-speed screw: 1-3/8 turns from seat
High-Speed MAG: 0 turns from seat
High-Speed PTO: 3/8 turns from seat

I have inquired a new issue, the carbs are backfiring at high-speed rpm's.

Here is a link to the video:

Thank you for the help!

 

[sgibson]

It also seems like it is only out of the MAG carb.

 

[LikeabossTM]

It also seems like it is only out of the MAG carb.

Might be a little lean on the mag HS circuit. I'd try turning the adjuster out a 1/4 turn on that one.

 

[sgibson]

Okay, let me go try it real quick. I'll give an update.

 

[sgibson]

Alright, I did that now it is backfiring out of the PTO side do I need to adjust that as well?
@LikeabossTM

 

[sgibson]

The only thing I haven't replaced is the fuel selector valve could this be a source of the issue?

Any ideas? @mikidymac

 

[sgibson]

It is backfiring now only on the PTO side and when I hold the throttle fully open.

PTO High-speed screw is a turn out now.