95 Yamaha super jet 700 runs for 2 to 3 minutes and then has no power and acts like the thermo switch works. The themo switch has been disconnected. Let I cool down and it is fine for the same 2 to 3 minutes. Checked all fuel lines, filters, tank etc. Rebuild kit on carb and new reeds which were bad even though I didn't think that was causing the problem? A mechanic said it might be the stator which is 460.00 from the dealer but not sure. Any help would be greatly appreciated.

The fan is controlled by a thermo switch . It's located on the radiator and has power going to it always and when temp goes up it grounds circuit and fan come on.

The start stays engaged the entire time? I would guess it's a bad ignition switch -- it would be sending power to the starter (through the solenoid) regardless of if you switched it off.

Maybe it could be a bad starter, too. I'd start with the switch.

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There are several reasons why a Maxim-X fan might not run. One reason might be that the fan fuse has blown. The fan has a 10A fuse all its own which is located under the cover for the indicator lights by the ignition keyhole (there are four #2 Philips screws that need to be removed before the cover can be removed to access fuses and indicator bulbs).

If the fuse is OK, then the next possibility is that the 'Thermo Switch" which trips the fan isn't making a connection. The Thermo Switch is threaded into the thermostat housing and has a push-on wire connection. Actually, the temperature sensor is also threaded into the thermostat housing but it is the smaller of the two sensors/switches. The larger of the two, which I believe is accessible from the left side of the thermostat housing, is the switch that trips the fan. Often the push-on connection gets oxidized and needs cleaning. Often the wire connection becomes loose and can simply be tightened and pressed securely back into place to restore the connection.

Another reason the fan might not spin is that the power connector has a bad connection. From toward the right side of the fan you'll see a short length of wire (maybe a foot) with two conductors leading to what I seem to recall is a red plug. Like all the other plugs, that can oxidize and create a bad connection. The plug can also come loose if someone before you has broken the locking tab or maybe didn't plug the two halves properly together again. You'll find the plug end up around the right side of the thermostat housing.... between the thermostat housing and the right frame rail. That's also where one white and one yellow plug are tucked away (the yellow is the power plug for the left coil and the white is the power plug for the right coil). It's a pretty tight cluster of wires and plugs but finding the red one for the radiator fan power is fairly easy because tracing the wire back to the fan is fairly easy.

So, if the fuse is OK and the thermo switch is working, and the connection from the thermo switch is a good one, and the power connection for the fan is solid.... then the fan might be burnt out. If so, they come up on eBay often enough so it shouldn't be too difficult to find a replacement.

But, from my experience, my money is on the fuse first, the bad thermo switch connection second and possibly a failed thermo switch third. That's what I've seen most often. Whatever it is, it's a reasonably easy fix.

Check your fuses. If they are ok check your themo sensor. If you disconnect the plug on the thermo sensor ,with ignition switched on, the fan should start.

I wonder what the fuel problem was. It kind of sounds like the idle jet, and/or low speed jet needs to be cleaned. Also while your in there, i would clean all the jets, and check the float bowl height.

Great bike I use to have a 81 XJ650J, hell of a bike, i miss it.

1994 700 cc waverunner when it has run for 15 min engine bucks at full throttle at 3/4 ok i have changer plugs antreated fuel

What switch are you resetting? If it's a limit or roll out then first check for proper air flow (filter, A/C coil) to see if it's overheating. Then watch the burner flames. When the blower comes on do they change shape, color or waiver? If so you may have a cracked heat exchanger.