Super Jet Bogs on bottom and gets worse as you ride

Ok, After two weeks of sitting the ski starts instantly without priming or touching the throttle. So I think I can rule fuel lines and the check valve out. Went through all the electrical in the e box. Everything looked good and was dry. Cleaned and dielectric greased every connection. Cut back the plug wires half an inch. Ski ran perfect for 5 minutes at the lake then died like someone hit the stop button. Think I have a no spark issue now. Gonna look at again tomorrow. I have a complete spare e box and stator. Just ended up parking it and riding my bone stock 91 SN that I picked up last week. Didn't want to waste a beautiful day fighting with it.
 

k-ris

Salvager
Location
United States
If suspect exhaust leak ride with hood off, if expect bad spark new plugs different coil, if suspect bad gas empty completely. To me sounds it could be bad gas. Fill it just enough and it runs that much until it hits the watery area of your gas tank. You said it ran one hour then it bogged when you thought you had a seemingly low gas tank, then you probably added a little more, water mixed in your new splash and didn't run. Also your stop switch could be a problem to, try lowering your idle and pull the plug with the black and white. The idle will be your kill switch momentarily.
 
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I tried to start it yesterday morning and by battery is fully charged I have power to the bilge pump but my no power to the starter button issue is back. Think I know were the problem is. But anyways I kicked it left it in the shed drank beer and wake surfed all afternoon at the lake.
 
ok so I think I got it narrowed down to the kill switch now. If it starts it fires right up and runs and idles fine then just dies like someone hit the kill switch. But every time I check I have spark and I have put new plugs in too just to eliminate things. The plugs are always wet with fuel because I have a primer. I never got it on the water because it was dieing to quick to warrant throwing it into the lake. Also every time I would pull the line on the check valve at the tank it would hiss like the was pressure on the fuel lines.
 
I was in the same spot last summer. Ski started perfectly every time but the power would drop off randomly when ridden. Went through the igniton system several times and finally realized it was the start/stop. I sent it to JSS for rebuild and never had the issue again.
 
same thing happened to me when gas tank full ran great as it went down ran worse and worse ,then pressurized the tank and found out it was my gas cap of all things, took me some time to figure it out , also u do get same symptomes from a cdi going bad !
 
If your tank isn't crushing itself then it's not the problem. They can run with or without the vent but without it will crush itself over time.

If it does it with the black plug to your start stop unplugged then it's not the switch.

The temp sensor will be very noticeable. It will be like a Rev limiter right above idle. Your engine will discolor quick if you got it hot.

I'd tear into the carbs if it's not the switch. Skis can be weird sometimes and just need to be gone through. Good luck
 
Location
England
@MikeyLikesIt is on the money i think. Start stop is F**ked or it could be your ignition coil going down. I had my coil go 2 weeks ago and was making the ski bog then would run fine for a few seconds then bog again. Start/stop can give the same symptoms if that is earthing out causing your ski to stop dead or rough like a bag of sh*te.
 
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