Super Jet Superjet Lost All power

[yamaha415]

My wife was riding her ski the other day and fell over. She said it seemed underpowered after she got going again so I jumped on it and it has nothing. If you hold the throttle wide open in just sputters along. I thought maybe she somehow got some water in the gas so I drained the tank, changed the filters, completely disassembled the carbs (everything looked good inside and ski clinic completely rebuilt them last summer). Compression is 150 PSI each jug. Took it out today and same thing. I dont know where to look from here maybe reeds or something going haywire with the ignition.
Any suggestions would be great.

 

[eak_photography]

see if you sucked up something in the pump, ive sucked up some wood chunks and my ski would do exactly what you're describing

 

[jamesgunter68]

see if you sucked up something in the pump, ive sucked up some wood chunks and my ski would do exactly what you're describing

X2 on this, little things inside the pump have a big effect.
Pressure wash the pump and intake area and try again.

 

[yamaha415]

X2 on this, little things inside the pump have a big effect.
Pressure wash the pump and intake area and try again.

Ten four. Visually the pump and intake look clean but maybe it's something I can't see.

I should add that the motor is not revving up at all. Out of water it sounds fine but in water full throttle is what about 1/8th to 1/4 throttle used to be

 

['kotajoe]

Clean the internal filter on the carbs

 

[yamaha415]

Clean the internal filter on the carbs

Did that when I took the carbs apart

 

[Cliff]

may have broke a baffle in the waterbox. been there, done that

 

[yamaha415]

may have broke a baffle in the waterbox. been there, done that

Put my buddies water box in for the second ride so I don't think it's water box related

 

[YamaCore]

also check for spark, sounds like it could be running on one cyl?

out of the water does it run good?

 

[Marcgraham27]

check the pink and black wires on the overheat sensor to make sure they havnt ground out

 

[yamaha415]

also check for spark, sounds like it could be running on one cyl?

out of the water does it run good?

Seems to run good out of the water. I'll check for spark

 

[yamaha415]

check the pink and black wires on the overheat sensor to make sure they havnt ground out

It's got a ada head on it so it doesn't have a sensor on the head. I assume you are talking about in the ebox though. I'll check that too

 

[Marcgraham27]

when i put an ada head on my first ski i just zip tied the sensor out of the way. after awhile the wires rubbed together and i had the same problem

 

[yamaha415]

also check for spark, sounds like it could be running on one cyl?

out of the water does it run good?

Spark on both cylinders not great spark, but spark non the less. And it revs up fine out of the water

 

[yamaha415]

when i put an ada head on my first ski i just zip tied the sensor out of the way. after awhile the wires rubbed together and i had the same problem

The sensor is long gone, but ill pull apart the ebox to see if anything is shorting in there

 

[yamaha415]

The sensor is long gone, but ill pull apart the ebox to see if anything is shorting in there

Inside ebox is dry and looks good.

 

[eak_photography]

maybe a bearing went bad in the pump and its bogging down the motor? you could always take it in to a shop for a diagnostic

 

[LimitedSlip7]

I'm having the same problem with a buddies ski. Haven't been able to figure it out yet either.

 

[Dmac80sc]

How does it sound?

 

[Dmac80sc]

I was just thinking maybe stripped splines but you say it sounds fine out of water?