I bought a 2001 gtx in Oct 2010 that was stored for 8 years after 40 hours of use. i am assuming it was not flushed or maintained by the previous owner. It does not overheat with the garden hose hooked up in my driveway (the water squirts out the back) but when i put it in the water for the first time it overheats and no water squirts out the back. i read the manual and did the rocking back and forth, put it in reverse, checked the intake grate and tried it 3 times but it kept overheating. I am new to PWC's so any info or help would be great. thanks.
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2001 gtx overheating - previously stored for 8 years
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manolocross
Well-Known Member
Check the temp sensor and perform the test....My ski did fine on hose and when i put it in water for first time began to overheat...tested the temp sensor and it was bad...search the forum on how to test...what engine is in your ski?
That's great is that's the only problem you have had after being stored for eight years. I would remove all the hoses and probably replace them, if they look o.k. flush the out with a garden hose or pressure washer. Also the passages in the pump. Blow compressed air into all the passages to make sure they are clear. If no blockages are found, or you can't clear the blockage remove the motor head.
Probably not a bad idea to remove the head anyway, so you can check the general condition of the engine, there are two large O rings one for each cylinder (keeps water out of the cylinders).
Lou
Probably not a bad idea to remove the head anyway, so you can check the general condition of the engine, there are two large O rings one for each cylinder (keeps water out of the cylinders).
Lou
it has the 947 motor.
More likeky that
1. excessive wear ring clearance
2. clog in cooling system lines, or fittings
3. sand in cylinder drain line
http://partsfinder.onlinemicrofiche.com/seadooforums/Seadoo_oem/Seadoo_PWC.asp?Type=13&A=87&B=9
Bills86e
1. excessive wear ring clearance
2. clog in cooling system lines, or fittings
3. sand in cylinder drain line
http://partsfinder.onlinemicrofiche.com/seadooforums/Seadoo_oem/Seadoo_PWC.asp?Type=13&A=87&B=9
Bills86e
Cavitation:
1.Water is pressureized in the jetpump and flows thru the engine. Any line or fitting should be wired out- air chucked to clear any corrosion/debis.
2. the area after the impeller is the venchuri, where three holes allow water into the supply water line. The nozzel is tapered and the mass is amplified. If the clearance between the blades and "walls" exceed .040" , the water is churned into an air/moisture mass bubble instead of a solid liquid thrust.
Bills86e
1.Water is pressureized in the jetpump and flows thru the engine. Any line or fitting should be wired out- air chucked to clear any corrosion/debis.
2. the area after the impeller is the venchuri, where three holes allow water into the supply water line. The nozzel is tapered and the mass is amplified. If the clearance between the blades and "walls" exceed .040" , the water is churned into an air/moisture mass bubble instead of a solid liquid thrust.
Bills86e
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ski-d00
Well-Known Member
the reason it may not overheat in the driveway is because the cooling system runs backward with a hose on it and the temp sensor is getting colder water first.
The temp sensors fair frequently, if you're getting good flow through the motor especially the exit line on the lower right side of the motor and the motor and pipe are not that hot to the touch, you should test your temp sensor.
pee holes may only dribble water out when at idle in water but should stream more at higher rpms, it will stream constantly on the hose. though.
The temp sensors fair frequently, if you're getting good flow through the motor especially the exit line on the lower right side of the motor and the motor and pipe are not that hot to the touch, you should test your temp sensor.
pee holes may only dribble water out when at idle in water but should stream more at higher rpms, it will stream constantly on the hose. though.
OK..............UNCLE! I dont know how to search the forum on how to find out how to test the temp sensor. Can anyone help? I tried but was not getting any answers. Thanks!
manolocross
Well-Known Member
un plug the wire then Remove the temp sensor fron engine...Get a cookin thermometer...get a voltmeter and set it for continuity(when you touch bothleads of voltmeter and it beeps)get a plate fill with waterabout a half inch deep and heat it up in microwave for 30 seconds...check temp of water...get it to 150 degrees...before puttin sensor in water check with voltmeter onelead on sensor body and other lead to plug of sensor,should be no beep...now let sensor tip sit in water(not touchin plate)water should be 150 degress....then check again with voltmeter,there should be no beep on voltmeter...now get the water to 210 degrees and let sensor tip sit in water for one minute,check with voltmeter,There SHOULD BE A BEEP ON VOLTMETER...the sensor should notmake the voltmeter beep before 190 degrees. If it does REPLACE IT! Let me know how it goes and if you have any questions!
manolocross
Well-Known Member
Before you test the temp sensor WHAT ENGINE IS IN YOUR SKI?!!!!
947 with Carb
jhjesse
Well-Known Member
How do you know it is overheating? Did you put your hand near or on the engine when the overheat alarm went off and check.
It will only pee out one port and at idle it will just dribble out.
On the hose it will put out a good stream. As stated above the water will run backwards on the hose, therefore it will pee out the port.
Try having someone sit backwards on the seat while you ride around and check the pee hole.
JMO, it is the temp sensor.
It will only pee out one port and at idle it will just dribble out.
On the hose it will put out a good stream. As stated above the water will run backwards on the hose, therefore it will pee out the port.
Try having someone sit backwards on the seat while you ride around and check the pee hole.
JMO, it is the temp sensor.
i found a temp sensor on ebay for $38. rip off dealer wanted $74. I will let you know how it goes. thanks
since it only overheats in the water is there anyway to test if it overheats other than putting in the water? It is a pain to keep putting it in and taking it out. i would like to simultate putting it in the water.................... in my driveway. i took out the temp sensor and cleaned it off and I would like to see if that solves the overheating problem.
Not really, unless you can find a shop or someone that owns a test tank. I suspect that your problem is with the pump, probably the wear ring. With a feeler gauge check the clearance between the impeller and the wear ring, should be no more than .004", about the thickness of a dime. Let us know and we'll go from there.
Also check the general condition of the wear ring. Are there any chunks missing? Is the wear ring brittle?
Lou
Also check the general condition of the wear ring. Are there any chunks missing? Is the wear ring brittle?
Lou
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jhjesse
Well-Known Member
ski-d00
Well-Known Member
to simulate in the water, all you have to do is disconnect the inlet line from the pump and connect your hose there. that way the cooling flow will be identical to when in the water and not going backwards as it normally is on the hose. depending on your hose water pressure, it will probably be close to pump pressure at idle.
I think Lou means .040" and not .004" above for impeller clearance.
I think Lou means .040" and not .004" above for impeller clearance.
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