I have a nearly new 2014 Yamaha Superjet, which has been running perfectly since we bought it earlier this year (guessing it has ~20 hours on it). We ran it last night with zero problems, but then this afternoon, within 100 feet, it would die. Start it back up, get up on plane and standing, then it dies again.
We had similar problems awhile back, and not sure if it solved any problems, but we just left the fuel petcock on "reserve", and the problem went away.
Not sure if it's a coincidence, but within the hull where the engine sits, there is about 2" of standing water. We have a second Superjet, and it's dry in the engine compartment. Doesn't seem like it should be related, but it was something I noticed when I had the hood off. I suspect that regardless of whether it's related, the seal around the drive shaft has gone bad?
We've been running the same premium fuel, same fuel ratio, same oil (Yamalube 2R), and in fact, filled the ski with the same gas from yesterday. Literally, rode it last night, put it on the lift, and immediately had problems right from the dock today.
It "feels" like it's just running out of fuel, checked the cables and the choke is off, throttle cable opens the carbs when you pull the trigger, so I don't think it's mechanical.
Any guidance on where we should start looking? Haven't pulled the plugs yet (to see if they are fouling), figured (hoped) this was a common problem and the remedy might be simple.
Thanks in advance for any guidance / insight others might be able to provide, appreciate you reading this and helping out.
Scott
We had similar problems awhile back, and not sure if it solved any problems, but we just left the fuel petcock on "reserve", and the problem went away.
Not sure if it's a coincidence, but within the hull where the engine sits, there is about 2" of standing water. We have a second Superjet, and it's dry in the engine compartment. Doesn't seem like it should be related, but it was something I noticed when I had the hood off. I suspect that regardless of whether it's related, the seal around the drive shaft has gone bad?
We've been running the same premium fuel, same fuel ratio, same oil (Yamalube 2R), and in fact, filled the ski with the same gas from yesterday. Literally, rode it last night, put it on the lift, and immediately had problems right from the dock today.
It "feels" like it's just running out of fuel, checked the cables and the choke is off, throttle cable opens the carbs when you pull the trigger, so I don't think it's mechanical.
Any guidance on where we should start looking? Haven't pulled the plugs yet (to see if they are fouling), figured (hoped) this was a common problem and the remedy might be simple.
Thanks in advance for any guidance / insight others might be able to provide, appreciate you reading this and helping out.
Scott