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Engine overheating
- Thread starter Toona
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The easiest place to disconnect your cooling hose is at the cylinder head. You can disconnect it there and see if air will flow through it. You can just blow through the hose. The air should blow out the holes in the jet pump. If air does flow, then check for a blockage at the hose nipple/elbow that screws into the cylinder head. If air does not flow when blowing through the hose, then your blockage is in the hose or at the jet pump.
Alternate way of checking it: If you have an extra piece of hose, you can connect one end to the elbow/nipple of the cylinder head and put the other end of the hose over the side of the boat. Then run engine on the garden hose briefly. If water does not come out of the hose, then check the hose nipple/elbow for blockage. If water does flow out of the hose, then your blockage is either in the hose going to the jet pump, hose fitting at the jet pump, or in the jet pump passage.
Alternate way of checking it: If you have an extra piece of hose, you can connect one end to the elbow/nipple of the cylinder head and put the other end of the hose over the side of the boat. Then run engine on the garden hose briefly. If water does not come out of the hose, then check the hose nipple/elbow for blockage. If water does flow out of the hose, then your blockage is either in the hose going to the jet pump, hose fitting at the jet pump, or in the jet pump passage.
gazzaskirepair
Active Member
Ur cooling system is blocked
Now it’s a case of disconnecting hoses and using hose pipe to flush the lines
Start at head and check from head to pump
Then head exhaust out let , remove little hoses on exhaust to see where flow exits
It’s just a case of checking where the blockage is and you may end up removing exhaust pipe
Confirm engine is a 951cc
Now it’s a case of disconnecting hoses and using hose pipe to flush the lines
Start at head and check from head to pump
Then head exhaust out let , remove little hoses on exhaust to see where flow exits
It’s just a case of checking where the blockage is and you may end up removing exhaust pipe
Confirm engine is a 951cc
Yes it's 951. Thank you, I'll be checking this soon. I'm just finishing up getting my other ski, the same year, make and model, running.
I just got my other ski running and I do see water in that one.
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gazzaskirepair
Active Member
If in salt water , use salt away
Unfortunately, it's only fresh water. Thank you though
gazzaskirepair
Active Member
No it’s fortunately fresh water, salt water kills jet skis. Over time if not maintained
Yes, that's exactly what it should look like.
No, it never does. So, these are the two houses I need top check, rightRemove the lines on exhaust and confirm you have water flowing through them
I have had the small water elbows and in-line connectors blocking up restricting flow
You can also heck you are getting water out of the exhaust system
If you are not then the cooling system flow is restricted causing the water to heat up causing the over temp
Remember it’s water flow you need and the amount of water coming from pump
Does it over heat on hose in the trailer 
Can I just disconnect those two hoses and hook up two extra hoses to those two elbows that I have lying around to see if water is coming out? That way I can tell if the blockage is in the hose or in the elbow? This is all fine to test on hose water, right?
In your picture, its the large one between the spark plugs you want to disconnect first. It connects to an elbow on the cylinder head. Unhook it and try to blow through the hose. Also, look into the elbow for a blockage. If you can't see a blockage with a flashlight, insert a zip tie into it to see if it is open. You can do this in your driveway. If you can't blow through the hose, the blockage is down by the pump.
After you get the main hose flowing, then check the little ones.
Let me add something, you might be able to blow through the big hose because its "tee'd" into the water regulator and the air may go out there.
We already know your main line is clogged. The question is: is it at the pump, in the hose, or in the elbow?
If you get a piece of 1/2" ID heater hose and connect to the cylinder head elbow and put the other end over the side of the boat, you can then run the engine briefly on the garden hose. Water should come out the hose you have over the side. If it does, then your engine and elbow are clear. Then you'll know whether or not you have to disconnect the hose down by the pump.
We already know your main line is clogged. The question is: is it at the pump, in the hose, or in the elbow?
If you get a piece of 1/2" ID heater hose and connect to the cylinder head elbow and put the other end over the side of the boat, you can then run the engine briefly on the garden hose. Water should come out the hose you have over the side. If it does, then your engine and elbow are clear. Then you'll know whether or not you have to disconnect the hose down by the pump.
I guess until you get the carbs fixed, you can't run the engine... When the time comes, if you can't find the clog in the cylinder elbow, you have to check by the pump or in the pump.
Here is a pic of the hose that goes from your cylinder head to the pump. The screwdriver is pointing to it.
Here is a pic of the water passage in the pump.
If its the jet pump cooling passage that is clogged, you'll have to remove the pump to get to it. Not a big deal though.
Here is a pic of the hose that goes from your cylinder head to the pump. The screwdriver is pointing to it.
Here is a pic of the water passage in the pump.
If its the jet pump cooling passage that is clogged, you'll have to remove the pump to get to it. Not a big deal though.
Seadoosmoker
Member
heads up new GTX's coming from the factory with loose house clamps....
Yes, but these are the old 2-strokes.
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Awesome, thank you. I just finished putting new fuel lines through it, replaced the fuel selector and got the carb back in. Fuel lines passed the pressure test so I'm going to get new fuel and then I'll ensure all the fuel lines and carbs are good, then I'll move onto the cooling hoses. Thank you
I undid this hose and nothing came out
gazzaskirepair
Active Member
Where did you connect the water hose pipe too
I had the ski hooked to a hose and that hose off the engine just went out the side of the engine compartmentWhere did you connect the water hose pipe too
Perfect, I'll test it tomorrow. Thank you
But the test I did was correct? Disconnect that hose and wait for water to hopefully come out?
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If you were hooked to the garden hose, water should have come out of that hose. Since the garden hose makes the flow of water flow in reverse, the water should come out of the engine and out of that hose that is in your hand in your pic. When the ski is in the water, water flows out of that "T" you disconnected it from and flows into the engine. If nothing came out, remove the hose from the cylinder head elbow and clear the elbow. You may have to remove the elbow to clear it.
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