Question about 2003 Yamaha YZ 250

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No feul It seems like im getting no fuel! everytime I spray the spark plug with starter fluid and it runs for a few seconds then it dies out. I figure it may be the feul filter but im not sure where it is. Please advise....Thanks

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  • monteguod May 06, 2010

    Yes i put a new spark plug but no luck

  • GCSmithACL May 11, 2010

    Have you tried changing the plug?

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  • Yamaha Master
  • 1,508 Answers

There is usually a tiny filter on the pickup on the fuel tap, you need to remove the tap from the tank to get to it. Before that pull the fuel line off the carb and open the tap and see if it flows. If fuel runs out , leave the tap alone
There also may be some jets blocked in the carb

Posted on May 05, 2010

Testimonial: "Ok I will try it thanks"

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Posted on Jan 02, 2017

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I have a cub cadet GT 2550. Has new battery cranks but will not start. Thinking it's not getting fuel. Checked fuel filter and fuel flows through.


If spraying starter fluid in the intake causes it to run for a few seconds, then you have a fuel problem. That starter fluid is the fuel. If it didn't have spark, it still wouldn't run. I would start checking the carb and make sure nothing is stuck or plugged.

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93 toyota pickup 4x4 it will stay running after I turn it on to start it up, it starts up then after a few seconds it kills


if I'm reading this right...
... the engine starts and dies within a few seconds.
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Disconnect the plug to the cold start injector. Even if you have an issue with the engine running then dying after a few seconds after doing this, if you don't smell fuel after disconnecting the cold start injector and try to restart it, the cold start time injector time switch may be failing.

Buy a can of starting fluid and have someone start the engine then spray short bursts of the fluid around all the intake fittings. If spraying the fluid in any particular area keeps the engine running, I'd start looking for leaks around that area.


It does sound like an AFM or COR issue considering it dies after a few seconds, but the fuel smell when trying to restart the engine may be a separate issue that needs corrected / isolated first.it will keep running.

... you smell fuel after trying to re-start when it dies.


Disconnect the plug to the cold start injector. Even if you have an issue with the engine running then dying after a few seconds after doing this, if you don't smell fuel after disconnecting the cold start injector and try to restart it, the cold start time injector time switch may be failing.


Buy a can of starting fluid and have someone start the engine then spray short bursts of the fluid around all the intake fittings. If spraying the fluid in any particular area keeps the engine running, I'd start looking for leaks around that area.


It does sound like an AFM or COR issue considering it dies after a few seconds, but the fuel smell when trying to restart the engine may be a separate issue that needs corrected / isolated first.

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siphon out the old fuel and put brand new fuel in the tank. Change the air filter even if it looks ok. Put in a new spark plug. Then get a can of starter fluid and an assistant. Squirt some starter fluid into the air intake and start it up. have your assistant continue to spray the starter fluid for a minute or so until it runs on its own. J.

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Hi. Replace the air filter. Then use some starter fluid and an assistant. Spray some starter fluid into the air intake as you start it up and keep spraying so that it runs on the starter fluid for a few seconds until it really takes off. J.

If this does not do it then you will have to have the carburetor rebuilt as it has hardened gunk in it.

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Sounds like a security problem that is preventing starting. It will run for a few seconds and then die.

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