Super Jet Still Bogging... it can't be the carb....
- Thread starter swapmeet
- Start date
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Brotastic
- Location
- Arlington TX
I actually did have water in my fuel. I found out Friday. I cleaned out my tank, let it dry over night. Opened the carb, dryed it out with carb cleaner. Put some fresh 93 mix in it and... nothing.
Like I said, I keep thinking I have it figured out and I go to test and theres no change.
I appreciate the feedback. From everyone!
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Brotastic
- Location
- Arlington TX
I believe you, cause you've been doing this for a minute. But this is what the pro-tec site claims.
http://www.pro-tecperformance.com/c2andc3heads.htm
*edit* I tried to cut and paste the chart, but you can open the link.
- Location
- North of detroit
Listening to that video it sounds just like my SJ... I had the same bog. I took off the carb and replaced the gasket to the manifold and that worked. Supertune told me about 2 years ago and he was right on the money..
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Brotastic
- Location
- Arlington TX
You mean the gasket below the carb or the intake gasket?
The gasket(s) below the carb are new and i've greased them to keep them from tearing etc.
The gasket(s) below the carb are new and i've greased them to keep them from tearing etc.
swapmeet
Brotastic
- Location
- Arlington TX
Ok got it back from the ski shop today. They're saying its over propped. Carbs fine, doesn't do anything that suggests any motor issues (pretty much what I already thought, but this confirms it.)
I'm running a Skat 12-17 swirl, but the motors ported so who knows. The owner of the shop described exactly what i'd been experienceing. Its like the ski hits a wall, if you unload the pump or force it to cavitate, its runs like a banshee on meth.
They showed me how to adjust the pitch myself, so i'm going to try and 'de-tune' it a little and see what happens.
Also, I snatched up a Hooker 9/15 today, so depending on when that gets here I may just throw that on and see what it does.
Anyway, I know a lot of people have read my thread(s) and some were wanting to know what the prognosis was. To be honest i'm not 100% sure this is the fix, but I trusted the guy to work on my ski, and paid him for his work and his opinion (he offered to pull the pump, repitch the prop etc, but said I could do it and save the money if I wanted,) so I will listen to what he reccomends and try it out.
Thanks again for everyones help, hopefully I can start having fun again.
I'm running a Skat 12-17 swirl, but the motors ported so who knows. The owner of the shop described exactly what i'd been experienceing. Its like the ski hits a wall, if you unload the pump or force it to cavitate, its runs like a banshee on meth.
They showed me how to adjust the pitch myself, so i'm going to try and 'de-tune' it a little and see what happens.
Also, I snatched up a Hooker 9/15 today, so depending on when that gets here I may just throw that on and see what it does.
Anyway, I know a lot of people have read my thread(s) and some were wanting to know what the prognosis was. To be honest i'm not 100% sure this is the fix, but I trusted the guy to work on my ski, and paid him for his work and his opinion (he offered to pull the pump, repitch the prop etc, but said I could do it and save the money if I wanted,) so I will listen to what he reccomends and try it out.
Thanks again for everyones help, hopefully I can start having fun again.
Mark44
Katie's Boss
- Location
- 100% one place
Agreed.
tom21
havin fun
- Location
- clearwater FL
swap will you give me a call again buddy?
dragginblazer
Do Good Jetski Crew
- Location
- North Richland Hills, TX
Sent from my cellular device using Tapatalk
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Brotastic
- Location
- Arlington TX
I will try to call you Tom if work allows.
I understand what all of you are saying, and agree to some point. But I don't have anyone locally who will look at my ski besides this guy, Its Dales Jet Sports, if any of you have heard of him. He used to race standups etc and has been in business for years.
So what i'm saying is he's seen my ski, started it, listened to it rev. I've made the arguements that ya'll are making, asked questions etc. To the point of boarderline insulting him by questioning his diagnosis. He's sure of it, I didn't want to pay him roughly $250 to do the labor when I know how to fix what he's diagnosing.
Also, the engine ran great with a stock FX-1 pump that it was previously attached to (less load). The only thing i've changed is the addtion of a 144 pump and this impeller (and a head, but they measured 165 & 175psi.) And the guy at Impros (can't rememeber his name, but super helpful) said that the number on the side of the prop is just a label, and confirming what you've mentioned, it probably isn't a 12/17 in reality. I will pull it out and measure the pitch and let ya'll know what it is.
I've tried a lot (A effing lot) of jetting/ N&S settings with my carb, tried other peoples carbs with different jetting combinitations to see if something is inherently wrong with my carb. None of it helped. The only thing I haven't changed is the impeller, and that was the one thing I changed from when the engine was in a 'known good' condition. I feel like a knuckle head for not trying this yet, I guess I didn't want to drop the cash on another impeller. I don't see any harm in throwing on a nice low pitch impeller and seeing what it does.
The other possible issue Dale suggested is binding in the driveline, but even if it was in fact binding I don't think react like this.
Once again, i'm hugely thankful for all the feedback ya'll have given me on this problem and I will defintely tell you if he's wrong. But I paid this guy good money to look at my ski. Whats the point if I ignore the diagnosis he gave me?
I understand what all of you are saying, and agree to some point. But I don't have anyone locally who will look at my ski besides this guy, Its Dales Jet Sports, if any of you have heard of him. He used to race standups etc and has been in business for years.
So what i'm saying is he's seen my ski, started it, listened to it rev. I've made the arguements that ya'll are making, asked questions etc. To the point of boarderline insulting him by questioning his diagnosis. He's sure of it, I didn't want to pay him roughly $250 to do the labor when I know how to fix what he's diagnosing.
Also, the engine ran great with a stock FX-1 pump that it was previously attached to (less load). The only thing i've changed is the addtion of a 144 pump and this impeller (and a head, but they measured 165 & 175psi.) And the guy at Impros (can't rememeber his name, but super helpful) said that the number on the side of the prop is just a label, and confirming what you've mentioned, it probably isn't a 12/17 in reality. I will pull it out and measure the pitch and let ya'll know what it is.
I've tried a lot (A effing lot) of jetting/ N&S settings with my carb, tried other peoples carbs with different jetting combinitations to see if something is inherently wrong with my carb. None of it helped. The only thing I haven't changed is the impeller, and that was the one thing I changed from when the engine was in a 'known good' condition. I feel like a knuckle head for not trying this yet, I guess I didn't want to drop the cash on another impeller. I don't see any harm in throwing on a nice low pitch impeller and seeing what it does.
The other possible issue Dale suggested is binding in the driveline, but even if it was in fact binding I don't think react like this.
Once again, i'm hugely thankful for all the feedback ya'll have given me on this problem and I will defintely tell you if he's wrong. But I paid this guy good money to look at my ski. Whats the point if I ignore the diagnosis he gave me?
tom21
havin fun
- Location
- clearwater FL
not to be a smartass but tell me how you KNOW that your carb is tuned correctly. prove to us that it is and I will agree with you on the prop issue. I cant say how much that setback will change things but I can tell you that set normally it should be fine. so with the other pump in there it should have been better which leads me back to the carb not being correct yet. and while I am still being a jerk go ahead and post a pic of your popoff tool while were at it. lol
I know there are a lot of "experts" on here, I am not pretending to know more than you or anyone else. I do have experience tuning skis and I still get stuck now and then. But I am willing to help you work thru it and if nothing else you should be able to be pretty sure you can tune a carb and know its right. or at least as good as I can do it lol.
Or swap the prop and tell us how great it runs and prove me wrong. so long as the end result is you getting it working its worth the egg on my face.
I know there are a lot of "experts" on here, I am not pretending to know more than you or anyone else. I do have experience tuning skis and I still get stuck now and then. But I am willing to help you work thru it and if nothing else you should be able to be pretty sure you can tune a carb and know its right. or at least as good as I can do it lol.
Or swap the prop and tell us how great it runs and prove me wrong. so long as the end result is you getting it working its worth the egg on my face.
swapmeet
Brotastic
- Location
- Arlington TX
Tom, I respect your knowledge, but I don't understand what I've said for you to take this tone with me.
I don't want to prove anyone wrong. I want my ski to work. It would appear that you determined to prove that your right. Nobody here except Dragginblazer has actually ridden my ski, reved the throttle or listened to it in person. How can you be so sure that the diagnosis is wrong?
I would appreciate it if you were a little more respectful. I didnt say "eff off Tom, what do you know!?!"
I said let me try what the guy who has seen my ski suggests FIRST, and if that fails to resolve my issue than back to the drawing board I go, including carb options/opinions etc.
Also you don't know everything I've tried with my carb. It's not like I turned the low speed screw and just shrugged my shoulders.
Dales rebuilt my carb, changed the low jet and tuned it as best they could given the loading issue.
I don't want to prove anyone wrong. I want my ski to work. It would appear that you determined to prove that your right. Nobody here except Dragginblazer has actually ridden my ski, reved the throttle or listened to it in person. How can you be so sure that the diagnosis is wrong?
I would appreciate it if you were a little more respectful. I didnt say "eff off Tom, what do you know!?!"
I said let me try what the guy who has seen my ski suggests FIRST, and if that fails to resolve my issue than back to the drawing board I go, including carb options/opinions etc.
Also you don't know everything I've tried with my carb. It's not like I turned the low speed screw and just shrugged my shoulders.
Dales rebuilt my carb, changed the low jet and tuned it as best they could given the loading issue.
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Mark44
Katie's Boss
- Location
- 100% one place
Do you know if the carbs have been tuned with a proper tachometer to achieve its highest RPM in jetting?
Mark44
Mark44
Before this turns nasty, I do want to point out what I see. I don't really see anyone necessarily trying to insult anyone. Most guys on here start getting worked up when they see people throwing parts and spending hundreds of dollars at a problem that they don't fully understand. We're all just giving educated guesses based on experience.
I can personally tell you that putting the same engine in the same ski with the same pump can have an major effect. Sometimes even just rebuilding the top end can cause you change 2 jet sizes...I had to.
I can personally tell you that putting the same engine in the same ski with the same pump can have an major effect. Sometimes even just rebuilding the top end can cause you change 2 jet sizes...I had to.
swapmeet
Brotastic
- Location
- Arlington TX
I don't think it has (61x), mainly because the engine hits a 'wall' and won't rev past that spot.
Does that make sense? If you cavitate or unload the pump, it winds up and launches, which further leads me to believe the impeller may be the culprit.
I don't have a tach, so as much as I would like to tell you what that RPM wall is at, I can't. I do know how important that is when tuning. Once I can get it to rev smoothly, then I believe I can properly tune the carb using GroupK's or Watcon's tuning guide. I used them before when I thought it was a carb issue.
The way Dale described it was its like trying to climb a hill with your car stuck in fifth gear. Thats how the ski is acting, and I agree from the way it rides. Also, at the upper 3/4 RPM range, the ski is so short and sketchy at speed that I can't get consistent runs to tune the high speed screw because I usually eat it.
Nut, I understand what your saying about throwing parts (money) at a problem. But the impeller is the only thing that I haven't changed, and its necessary to buy one (around here anyway) to test the theory. If it doesn't solve the problem, I could sell the impeller Its a 9/15 Hooker, somebody will want it.
I want to measure the pitch on my prop and see what it comes out to. Maybe that will answer a lot of questions. In the mean time, the hooker is on its way via USPS.
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- Location
- Stouffville, Ontario
Having very similar issues with my 701. Only downside is that it has always been this way. Hope to see your problem solved soon.
Mark44
Katie's Boss
- Location
- 100% one place
I just had my impeller fixed, it had a small bend in one of the blades and it killed performance. I could not see the bend in the blade till I took the pump out of the ski. It also ran like it was stuck in the mud. No rpm's and no top speed.
- Location
- Granbury, TX
Sounds like your pop off is too high in my opinion. Check your pop off with a tester. You said it was ~27 psi. Try ~20 psi. Don't go by the spring color/N&S calc either. You need to check it with a tester. Then go a few psi lower.
You might surprise yourself.
You might surprise yourself.