shattered00
Active Member
Hello All,
Yet another summer is here and I am still fighting the second 96 XP. A quick recap of my ski's symptoms. Ski has instant throttle response out of the water and revs up fine. Placed in water, ski either dies when throttle given to fast or throttle won't have any impact on forward movement. Even when slowly depressing the throttle, ski will sometimes get up to maybe 10mph but bog and/or die. Ski idles fine in water for as long as throttle is not depressed. Ski has no positive impact when choke is pulled halfway or all the way while trying to depress throttle.
For actual video of the issue, please check my original thread. 3 years and so close with one 1996 XP - still bogging
Here is what I have done so far. See below that for my question regarding the waterbox/ water valve regulator
- Changed the fuel selector valve/switch ( I tried to find new OEM, but was unable to - I ordered one that said OEM but was not - stamping was from Taiwan in unmarked box).
- Replaced the water separator and ensured it had a new o-ring
- Replaced all grey fuel lines with USCG rated black fuel lines - verified no obstruction in any fuel lines with air compressor
- I have changed the inlet and outlet valves for the fuel tank (one of which goes to the outside of the ski to relieve pressure)
- Changed the rectifier (also tested with red wire disconnected and did not fix the issue)
- New fuel is in the gas tank with slight amount of oil per the manual on new engine break-ins
- All clamps corresponding to fuel lines/carbs/water separator have been tightened
-Carbs have been cleaned out (compression shot through the nozzles to clear out any debris with carb cleaner being shot through after to make sure they were open)) and rebuilt with a genuine Mikuni kit along with Mikuni 80gram black spring and Mikuni 1.5 Needles(viton tip)/seats
- Carbs have been set to factor specs (Low 1, High 0) - I have also tried low from 1 to 1.5 with no difference noticed)
- Carbs have now been rebuilt by a jet ski shop (one of the butterfly valves was found to be bent from what the mechanic said was likely a rare backfire so I had to cannibalize one of the carbs from the second 96 and give to him and he combined them - the second set also had one carb which had a bent butterfly valve again which he said was really rare). Pop off pressure is good, etc. per the mechanic. I really thought the carbs were going to be the problem but it did not change the symptoms at all.
- Cleaned Rave valves
- Changed spark plugs and gapped properly - NGK Br8es
- Rotary valve timing confirmed proper
-Compression 150 in both pistons (engine newly rebuilt)
There is a small oil tank leak somewhere, so I am not sure how that could cause this problem, but just mentioning it in the event that someone can confirm that could cause the bogging issue.
I have been searching the interweb and came across this thread: 1996 won't rev over 1/4 throttle in water. Completely rebuilt. What now? @TurnerBFC @Matt Braley
In the thread, Turner appears to have a similar problem as me. Braley suggested a broken baffle in the water box and subsequently mentioned a bad water valve regulator. Per Braley, to diagnose the waterbox, I would pull it and shake it while listening for a rattle so I will do that, but also later in the thread it is mentioned that Turner replaced the hose and that fixed the issue and that the water regulator valve was also damaged and replaced. Which hose was replaced? The large one that goes from the waterbox to the back of the ski for the exhaust port? What did replacing the hose do to fix it?
How do I tell if the water regulator valve is broken? Is the water regulator valve the "rave" thing that looks like the two rave valves on the engine? Does this seem like something that could be my problem? Braley mentioned that if the hose was soft then the water regulator has failed. I haven't been able to see a leak but I haven't really been able to ride without seat off. Which hose would I be looking for and does soft mean something like that the material is degrading?
Apologies for the long post and all the questions, but I am crossing my fingers that this is the problem. Thank you all for any help.
Yet another summer is here and I am still fighting the second 96 XP. A quick recap of my ski's symptoms. Ski has instant throttle response out of the water and revs up fine. Placed in water, ski either dies when throttle given to fast or throttle won't have any impact on forward movement. Even when slowly depressing the throttle, ski will sometimes get up to maybe 10mph but bog and/or die. Ski idles fine in water for as long as throttle is not depressed. Ski has no positive impact when choke is pulled halfway or all the way while trying to depress throttle.
For actual video of the issue, please check my original thread. 3 years and so close with one 1996 XP - still bogging
Here is what I have done so far. See below that for my question regarding the waterbox/ water valve regulator
- Changed the fuel selector valve/switch ( I tried to find new OEM, but was unable to - I ordered one that said OEM but was not - stamping was from Taiwan in unmarked box).
- Replaced the water separator and ensured it had a new o-ring
- Replaced all grey fuel lines with USCG rated black fuel lines - verified no obstruction in any fuel lines with air compressor
- I have changed the inlet and outlet valves for the fuel tank (one of which goes to the outside of the ski to relieve pressure)
- Changed the rectifier (also tested with red wire disconnected and did not fix the issue)
- New fuel is in the gas tank with slight amount of oil per the manual on new engine break-ins
- All clamps corresponding to fuel lines/carbs/water separator have been tightened
-
- Carbs have been set to factor specs (Low 1, High 0) - I have also tried low from 1 to 1.5 with no difference noticed)
- Carbs have now been rebuilt by a jet ski shop (one of the butterfly valves was found to be bent from what the mechanic said was likely a rare backfire so I had to cannibalize one of the carbs from the second 96 and give to him and he combined them - the second set also had one carb which had a bent butterfly valve again which he said was really rare). Pop off pressure is good, etc. per the mechanic. I really thought the carbs were going to be the problem but it did not change the symptoms at all.
- Cleaned Rave valves
- Changed spark plugs and gapped properly - NGK Br8es
- Rotary valve timing confirmed proper
-Compression 150 in both pistons (engine newly rebuilt)
There is a small oil tank leak somewhere, so I am not sure how that could cause this problem, but just mentioning it in the event that someone can confirm that could cause the bogging issue.
I have been searching the interweb and came across this thread: 1996 won't rev over 1/4 throttle in water. Completely rebuilt. What now? @TurnerBFC @Matt Braley
In the thread, Turner appears to have a similar problem as me. Braley suggested a broken baffle in the water box and subsequently mentioned a bad water valve regulator. Per Braley, to diagnose the waterbox, I would pull it and shake it while listening for a rattle so I will do that, but also later in the thread it is mentioned that Turner replaced the hose and that fixed the issue and that the water regulator valve was also damaged and replaced. Which hose was replaced? The large one that goes from the waterbox to the back of the ski for the exhaust port? What did replacing the hose do to fix it?
How do I tell if the water regulator valve is broken? Is the water regulator valve the "rave" thing that looks like the two rave valves on the engine? Does this seem like something that could be my problem? Braley mentioned that if the hose was soft then the water regulator has failed. I haven't been able to see a leak but I haven't really been able to ride without seat off. Which hose would I be looking for and does soft mean something like that the material is degrading?
Apologies for the long post and all the questions, but I am crossing my fingers that this is the problem. Thank you all for any help.