Super Jet Superjet pisser sputters and pump loads up but barely moves

[catfish4767]

I went riding over the weekend and the ski had been running good however the last time I rode I noticed the pisser sputtered as I was idling out of the cove. And when I'm running outside the no wake buoys it's not a steady flow like normal. I'm running a bpipe with one pisser, single line. The line from the bottom of the pipe runs to the head, top of the pipe runs to a T into the stinger. After the T is a flow control valve. Should this be set up differently?

Also, as I left my cove yesterday the ski seemed fine at idling speed and I hit a wave or two then it wouldn't go above an idling speed but felt a lot of vibration under my feet. I had this happen on a SN before but it wouldn't move anywhere because the driveshaft was worn. Does this sound like the same situation just not as worn down? Ski runs fine at idling, just when I give it throttle it doesn't go anywhere.

I know best thing is to remove it and take it apart and check it all out but it's on my dock and the ramp is on the other side of the lake. I'm just looking for feedback/things to check on the dock before I tow it to the ramp. Thanks guys

 

[x2mafia]

Sounds like you got something in your pump possibly wrapped around the vein where your water in fitting taps in. Also do you have your overhead temp sensor still hooked up? Could be overheating putting it into limp mode because of the water blockage

 

[x2mafia]

Also if something is in your pump and its cavitating bad that would cause lack of water flow as well because it works off of pressure. Check out that flow control valve and make sure there isn't a blockage as well

 

[Vortex]

Check compression

 

[Sasquachcrap]

Same issue here with blown head gasket.

 

[catfish4767]

I'll check compression when I get home. Motor was rebuilt just before I got it. I'll check pump and flow valve too. Thanks guys

 

[SXIPro]

pump full of flotsam and jetsam

 

[catfish4767]

Sounds like you got something in your pump possibly wrapped around the vein where your water in fitting taps in. Also do you have your overhead temp sensor still hooked up? Could be overheating putting it into limp mode because of the water blockage

The temp sensor is not hooked up. I have a Protec head on the motor

 

[catfish4767]

Compression in the front cylinder was 120 but had stuff squirting out (see pic for after shot). Back cylinder was 145. And it's a R&D head. Unsure of domes. There appeared to be nothing caught in the pump.

 

[catfish4767]

back cylinder did not have anything coming out while checking compression

 

[Sasquachcrap]

What was the compression on both cylinders? 120 145. I had the same issue. Replace the head gasket. Be sure you top deck is flat. My cylinders had a wonky top cylinder. Blew 2 gasket in the same spot. Resurfaced the cylinders and its gold now. My motor was freshly rebuilt too. Not by me.

see where the materiel is being removed and that was the high spots it took .020 of cutting to get it flat.

 

[x2mafia]

was your front plug white washed?

 

[catfish4767]

was your front plug white washed?

It didn't look like it but I can't remember now. I'll check tomorrow

 

[badvinny]

120 and 145 is pretty poor, especially if you have a Protec head. For a motor that was just rebuilt the 120 is unacceptable but if you are lucky it is just the head gasket as Squatch mentioned.

 

[catfish4767]

120 and 145 is pretty poor, especially if you have a Protec head. For a motor that was just rebuilt the 120 is unacceptable but if you are lucky it is just the head gasket as Squatch mentioned.

It is. Just checked old pictures and the previous owner had it at 180psi in each hole about a week before I picked it up. I'll take the head off this weekend and see what I find

 

[catfish4767]

Looks like the 120 cylinder has a cracked dome. And the o rings look like they need to be replaced correct? Just trying to figure out why the rest cylinder would have 140psi. The piston with the dark spot has 140psi. Cylinders looked fine to me

 

[Vortex]

Looks like the 120 cylinder has a cracked dome. And the o rings look like they need to be replaced correct? Just trying to figure out why the rest cylinder would have 140psi. The piston with the dark spot has 140psi. Cylinders looked fine to me

Good idea to replace o rings on each removal of the head. You may have blown the small o ring on the 140 cyl when the other one went out. Check your piston wall clearance on the 140 cyl as well. Might be time for a bore/hone and new pistons

 

[catfish4767]

Good idea to replace o rings on each removal of the head. You may have blown the small o ring on the 140 cyl when the other one went out. Check your piston wall clearance on the 140 cyl as well. Might be time for a bore/hone and new pistons

New Pistons even if the top end was new in November and has less than 5 hours on it?

 

[badvinny]

was it a fresh rebore also