Need help and advise on my superjet that I'm having issues with. It's a 62t case with 760 cylinders. I have only ridden the ski twice now and both timea I have taken it out it has run perfect for the first 20 or so minutes, carb it tuned perfect so I have ruled out it being the carb and believe it is electrical. After about 20 minutes of riding it loses its power, the best way I can describe it is its almost like it Rev limits much lower than it should. And if I ease into the throttle around half throttle it runs good. But if I get on the throttle hard or pin it, it just runs horrible and sounds similar to Rev limited but not clean. What I was thinking is it could be either the stator or something to do with the flywheel? Or maybe the coils???? Please let me know what you think it could be. Also I have a flywheel and stator and plate and everything from a 650 would that work if I need it? Thanks
Superjet electrical problems?
- Thread starter cade_dutt
- Start date
bump anybody? put in some other coils hoping that was it. still have the same problem. i have a complete complete stator also? still seems like a weak or bad spark to me, when i gas it hard from low idle or try to pin it, it feels like its almost running on 1 cylinder, but when i have it mid throttle it still pulls hard and snappy. but from idle to hard throttle it feels like 1 cylinder and sounds very odd. should i try the stator? would like some advise or ideas before i have to take out the flywheel and everything if that may not be it
thanks
thanks
OCD Solutions
Original, Clean and Dependable Solutions
- Location
- Rentz, GA
A failing charge coil might present like that but I would try a couple other simpler things first.
Ride it with the hood off, or cracked a bit to let air in. A fuel or exhaust leak could build up over time under the hood.
Also, check if the tank is vapor locking. If it can't pull air in, it could vacuum the tank over the 20 minutes and cause a fuel starvation issue from that point forward. When it's acting up, just crack the fuel fill cap and listen to see if it sucks air in, or blows it out.
If neither of those items makes any difference, then I would swap the stator out.
Ride it with the hood off, or cracked a bit to let air in. A fuel or exhaust leak could build up over time under the hood.
Also, check if the tank is vapor locking. If it can't pull air in, it could vacuum the tank over the 20 minutes and cause a fuel starvation issue from that point forward. When it's acting up, just crack the fuel fill cap and listen to see if it sucks air in, or blows it out.
If neither of those items makes any difference, then I would swap the stator out.
thank you! i will try both of those ideas, did not know to try that so it sounds like either of those could be the problem
Perfect amount of time for an exhaust leak to cause that kind of condition too
have not found the problem yet. but I'm about 100% sure mine is the exhaust leak, just have not had time to take it out yet to see if it is fixed. taking off the hood seemed to fix my problem so try that and if that fixes it its the exhaust leak
JT_Freeride
John Tetenes @Jtetenes
- Location
- Long Island
Yours sounds like it has a clogged return line pull the return line from the gas take when the ski is out of the water and see if fuel come pouring out when running. Easy thing to rule out. And also the check valve on the gas tank.
thanks. i will check that also but i recently changed all the fuel line and had the problem before and after the new fuel line but it is worth a check
Vumad
Super Hero, with a cape!
- Location
- St. Pete, FL
Are you running an over temp sensor? Is your motor getting too hot?
If you have an exhaust leak, you will lkkely see some sprt of smoke when you lift the hood.
If you have an exhaust leak, you will lkkely see some sprt of smoke when you lift the hood.
JT_Freeride
John Tetenes @Jtetenes
- Location
- Long Island
The clog will be in the return plate in the carb
not running a temp sensor it was cut off due to am head. and no engine runs cool, with duel cooling and cold ocean water it runs cool
and because i actually don't see smoke you could be right.. which side is the return plate on?
Vumad
Super Hero, with a cape!
- Location
- St. Pete, FL
If you have stock sbn 38s the return is built into the plate on the slave carb, and on the csrb body on the primary carb, just follow the lime back from the slave carb. The slave carb plate is on with an orjng sonyou should be able to tske it kff without messing up any gaskets.
sorry should have told you, but i have duel 48s
ive rebuilt them before but not sure exactly which part that is. is it on the side with the diaphragm or other side
JT_Freeride
John Tetenes @Jtetenes
- Location
- Long Island
Where the return line goes into the slave carb the one with out the fuel pump. Pull of that plate and blow through it. If you can't it's clogged.
sorry for all the questions have 1 more. mine is set up for separate fuel valves so each carb has separate fuel delivery lines. so should both be able to be blown through? and should it be blown through freely? or have some resistance thanks