Cooling Issues / My ski almost sank?!?

[2lick]

Background Info:
This winter I had a project superjet. I ran it for 6 weeks this summer with no problem. Then one day the rear crank seal popped out. So my fix was too pull the engine, flip it, put in new seals, etc and put the engine back in. While I was pulling the motor I decided to replace my cooling lines beacuse the type of hose I had used was rubbing throught.
I did all of that and reasabled the boat with new hose. I hooked up my colling lines like this (see below pic1). I am not positve on how my cooling lines were hooked up before the escapade. However I modeled it after this so it should be the same. AM I MISSING SOMETHING STUPID!

Picture is Dual cooling lines ran as a parellel system: Green is a crossover line to work as an emergncy if one line gets clogged.

Problem:
Now when I am at idel very little water comes throught my exhaust pisser. The more throttle I give it the more water flows throught th pisser. ISNT THIS BACKWORDS AF HOW IT SHOULD BE. So when Im going slow all the water goes into my stinger/waterbox. I notice more smoke now too out of my front exhaust? I think?
I dont think its cooling right?!

Problem2:
When I tied my ski off too a boat sitting in a cove in about 40 minutes if was half under water!!! I have the old fuel inlet under the nosepiec/bill (squarenose) open for air. Do you think the water box was full and wieghted it down and it slowly took on water there?

HELP HELP HELP
Top Priority is to get the cooling right so I dont hurt anything.
I can always park it on a beach untill I figure out the other ********.

Thanks-NICK

 

[jetskier79]

Background Info:

Problem:
Now when I am at idel very little water comes throught my exhaust pisser. The more throttle I give it the more water flows throught th pisser. ISNT THIS BACKWORDS AF HOW IT SHOULD BE. So when Im going slow all the water goes into my stinger/waterbox.[/B]

The little water at idle/lots at throttle is correct. You want less water in your stinger at low speeds.

I have the old fuel inlet under the nosepiec/bill (squarenose) open for air. Do you think the water box was full and wieghted it down and it slowly took on water there?

Put that gas cap back on. You do not need a gaping hole in the front for air. I would say there is a very good chance that this is the culprit.

 

[2lick]

damnit I havent rode this thing since sat I ment opisite of how i descrided it.

I GET LOTS OF WATER THROUGHT PISSER AT HIGH SPEED AND LITTLE OR NEXT TO NONE AT IDEL/LOW SPEED!!

 

[Matt_E]

I GET LOTS OF WATER THROUGHT PISSER AT HIGH SPEED AND LITTLE OR NEXT TO NONE AT IDEL/LOW SPEED!!

I think that's normal. High speed = much more pressure in the pump to push water into the cooling circuit.

 

[2lick]

I know what you mean Matt_E, I was thinking the same thing but....

before I pulled the engine and replaced/re-ran the cooling lines it was not like this. Thats why it concerns me.

I know its cooling the head pipe beacuse it is making a circut. Can I hurt my engine if no water goes into the stinger and waterbox....

 

[2lick]

FYI: I took my pump off just now and blew air throught the lines and tried all possible paths all path flowed good.

 

[2lick]

nothin?????

 

[Frosty]

i run pretty much that same cooling set up... except no cross over and two bypasses from the head. Anyway, yup.. at low speed you will have less water coming from the pisser because the pump pressure is much lowere than at WOT.

Also, are you running scuppers or one way check valves - maybe that's what's leaking. Or, how about your intermediate bearing housing - make sure that is sealed good to the bulkhead or it can leak. I would totally close off the open fuel inlet in the nose if you are not using it, but I don't think your water box would have weighed the nose that far down to allow it to sink... that would only add a few lbs of water to the nose...

 

[SUPERTUNE]

I don't think thats a very good way to set-up the cooling, Here's a starting point... use this diagram to start with and go from there.
http://www.x-h2o.com/attachment.php?attachmentid=3565&d=1143383308

 

[Big Kahuna]

I would loose the crossover, it may mess up your flow.........

 

[Mark44]

I would loose the crossover, it may mess up your flow.........

I second that.:biggthumpup:

Mark44

 

[yamaslut]

actually that may prevent a meltdown w/ that particular setup... I would leave it if you plan on running that

 

[Big Kahuna]

if one circuit is flowing better, it may actually try to siphon water from the weaker circuit causing improper waterflow............

 

[yamaslut]

if one circuit is flowing better, it may actually try to siphon water from the weaker circuit causing improper waterflow............

I would doubt that would happen, since they are both comming from the same source, w/ approx the same amount of pressure behind the two. There would have to be a break in one of the lines before the 'T' in order to allow the flow of water to the other side. Cause if the line is clogged before the 'T' it will essentially hydro lock (if that is the right term) and not allow any flow... You need to have air flow in order for water to flow in an open loop system like that. Conversely, If there was a clog on one line after the 'T' it would then direct water to the other side to keep it from burning up too fast.. Not saying it would be sufficient for proper cooling, but it may get ya back to the beach...

I don't really understand how it could be a bad thing...

I had my ski setup like that, w/o the "link" between the two and a very well repected engine builder :sneaky: told me to do link the two circuts just to be safe

 

[yamaslut]

thinking about it... it would be a very simple experiment to do w/ just some hose a couple t's and the faucett... Hmmmm???

 

[romack991]

i'd agree with lose the crossover and pay attention to your pissers,
or go away from the parrallel cooling.

the crossover could cause erratic flow to either side and you wouldnt be able to tell it very well.

 

[yamaslut]

i'd agree with lose the crossover and pay attention to your pissers,
or go away from the parrallel cooling.

the crossover could cause erratic flow to either side and you wouldnt be able to tell it very well.

nah...

 

[junkman]

well im confused on what he is saying. He stated that in regards to the low speed/idle low water flow and at higher rpm/speed more water. He said it was not like this before. IF it was different please explain what it was like. As like previously stated that is normal. Can you keep the ski in shallow water with the hood off and look inside to see were water might be leaking in from?