Question about Yamaha Waverunner Xl 800 / Xlt 1200 Jet Ski Pwc Cover

1 Answer

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.

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  • johnny bonacci
    johnny bonacci May 31, 2017

    It could be that your crankseals are leaking. The carbs rely on crank pressure to operate properly. If the seals are leaking it can cause very inconsitent issues with how the ski will run. Also the seals can ruin a stator if they are leaking. Pull the flywheel cover off and see if it is wet with oil inside. I think you need a stator to fix your problem, and the ski will still run with leaking crankseals, but if they are leaking they can shorten the life of your new stator. And yes stators are not cheap.

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  • 331 Answers

Have you tried without fuel tank cap?
Seems to me as a fuel delivery problem...

Posted on Nov 14, 2017

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Posted on Jan 02, 2017

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tombones

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SOURCE: Won't idle without choke

The pilot jet controls the air/gas fuel mix at idle . If the jet gets plugged up not enough gas gets to the emgine at idle. You will need to remove the carbs and float bowls and clean them, paying special attention to the pilot valve. Count the number of turns to remove the pilot screw and replace the same number of turns then turn counter clockwise 1/2 turn.

A “very helpful” rating for this answer? Thanks!

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Posted on Jun 30, 2009

Anonymous

  • 1392 Answers

SOURCE: 2000 Yamaha TW 200 lacks power, has a high speed

If your header is glowing red, you are getting way too much gas in the cylinder, and it is burning it in the pipe. You either have a misadjusted float, or your timing is off. You could be as little as a tooth off, and have a problem. I would suspect the carb flooding more so.

Posted on Jul 13, 2009

Anonymous

  • 1 Answer

SOURCE: 2002 YAMAHA BANSHEE WILL NOT REV

I have a 2004 banshee at the yamaha dealer being worked on.It would not run when i took it up there they cleaned the carbs and put it back together it will start but when you rev it, it holds itself wide open and wont shut down unless you pull the plug wires.they also checked the floats in the carbs said they where ok. they think it is a vent issue with the gas tank or the fuel shut off valve.IS THAT POSSIBLE

Posted on Aug 27, 2009

Anonymous

  • 1 Answer

SOURCE: 1997 Yamaha Kodiak 400, hard to start, once you

I would follow the fuel line all the way check the filter it should be inline and check the pump as well i would say its one of them two.

Posted on Jun 21, 2010

heimlich

David Belcher

  • 1978 Answers

SOURCE: I have a yamaha

Check that the intake manifold is not cracked or separated, extra air might cause you to need the choke. Some times the first carburetor cleaning does not do the trick. Take the carburetor off again, take out the slow jet, and shoot through it with cleaner to make sure it is clear. Now shoot through the passageway of the body and make sure that the body of the carburetor is clear . When all passageways in the body are clear then reassemble and put it back on. If the air screw is set correctly you should have a machine that idles.

Posted on Sep 09, 2010

Testimonial: "Thank you very much Heimlich. that should do the trick. "

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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.

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I have a 1986 Yamaha MaximX 700, i have cleaned the carbs with carb cleaner and seafoam, but when i start it, the only way to keep it running is having the choke all the way on and twisting the throttle...


Hi, Caseytkerns and the usual suspects are:
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2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
How to Clean Motorcycle Carburetor the RIGHT way Evan Fell Motorcycle Works
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Yamaha XJ700N Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xj-owners-manuals

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1 Answer

Gas problem fixed on my bike. Now the problem is keeping it running. It starts after a few tries but it stalls right out and than it's hard to start back up. I have an 1985 Yamaha 700 Maxium


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.

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