do cooling lines airlock?

[fulltilt429]

What up all? Got an 08 superjet, I recently removed my head pipe, cleaned the couplers and reinstalled. Installed new headpipe gasket, and made sure everything is connected. I have single cooling, stocks head, bpipe with a flow control valve set at 3.5 psi.

I put the ski in the water and allow it to warm up about 2 minutes of very light idle. This entire time I'm getting a slight trickle out of the pisser, I roll into the throttle to wide open, and still no change. I flip a u and pin it back to the dock and still nothing but a trickle.

I pull it up and check all my lines all OK. I adjust the fcv to basically no resistance and let it idle till I get good flow, and than ride and all was OK....

My question can these motors get an airlock, or did I just have some crud in there?

 

[fulltilt429]

Anyone?

 

[Matt_E]

I have never had it happen, and I can't see any good reason why they would.

 

[stanton]

sounds like your FVC is setup wrong or in the wrong spot.

 

[Matt_E]

x2 - you should have a bypass before the FCV.

 

[fulltilt429]

I have the t to the pisser b4 the fcv

 

[Matt_E]

If your lines don't have an obstruction and are hooked up to the pump, you should get water flow.
To trouble shoot this, try disconnect the line before it hooks up to the engine.
Start the motor (in the water) and idle it for a few seconds. You should have water coming out of that line.

From there, reconnect the line and take the line from the top of the head off.
Same thing - repeat this until you find the problem.

 

[Proformance1]

Maybe a shell or obstruction in the cooling line, when you stopped it it came loose. I had that happen once in cleveland with all the zebra muscles on the beach.

 

[fulltilt429]

Yeah I took it all apart and checked for obstructions tonight and couldnt find anything. That must have been what is was. Also how do you guys know what temp your at?

 

[easyrhino]

I've cleared tree bark from an elbows by starting it up, lifted the pump out of the water and covered the exhaust with my hand. I know it was tree bark because it floated around in the engine until it ended up in the other elbow (that was not feeding the b-pipe). I road it back to camp that way and had to pull the head to clear it and replaced every water line that was touching the chamber. I ran great with a dry b-pipe. Sounded like my old YZ. Than I notice weak stream out of the pisser.

 

[Proformance1]

Waterproof Temp gauge in a T after the motor, once I got used to it now I can feel the temp with my hands and tell where im at.

 

[stanton]

I have the t to the pisser b4 the fcv

IMO this is incorrect, the water will take the path of least resistance and thats directly overboard. the pressure needs to be very high for the valve to do anything thats why you had to set it so low. i run it before the t so i can visually monitor the water flow and have more consistent pressure on it. i do have dual cooling so not sure if it matters.

 

[Dustin Mustangs]

That's not how the person who designed that valve would tell you to run it. With it setup like that, when it is closed you would have no flow through the headpipe and more importantly only a very small amount of flow past one cylinder/dome. That really sounds like trouble to me buy hey if it works, it works!

 

[Proformance1]

That's not how the person who designed that valve would tell you to run it. With it setup like that, when it is closed you would have no flow through the headpipe and more importantly only a very small amount of flow past one cylinder/dome. That really sounds like trouble to me buy hey if it works, it works!

I'm with you, Art said to put the flow control after the T and to restrict the other sode if the heads flow out. Gotta cool that motor at all times

 

[stanton]

That's not how the person who designed that valve would tell you to run it. With it setup like that, when it is closed you would have no flow through the headpipe and more importantly only a very small amount of flow past one cylinder/dome. That really sounds like trouble to me buy hey if it works, it works!

and i disagree with him too, my exaust overheated when i followed his directions!
like i said i have dual cooling so the exhaust and engine circuts are seperate as can be. i always have a small ammount of flow coming out the exhausts pisser(after the fcv) except for at idle, and i dont idle, and it increases flow with rpm. everything is cool and even works great. now for single cooling i can see it doing that, but your exhaust would start melting hoses too!