Revving Engine

[ralphy]

It seems like everytime my fuel level gets to a certain level on my 85 250r, the engine revs at an abnormally high rpm. I have to smack the throttle to get it to come down. It did it to me when I first bought it, so I took the carb apart and cleaned it out and have not had a problem until yesterday. I don't think it is the carb this time. and the throttle is not sticking. A buddy of mine told me that the engine will rev high when it is out of gas, so i swithced the fuel supply to reserve and it didn't do it. Any ideas?

[Macs]

On a 2 stroke, if the engine is starving for fuel it will rev uncontrollably ( SP). When your fuel gets to that certain level, is it close to being empty at the on port?

[ralphy]

Yesterday when it happened, I could see the top of the in-tank fuel filter sticking out above the level of the fuel in the tank. I then swithced toreserve and it didn't seem to have a problem. I did not run it very long in reserve though because I was afraid it would do it again.

[Macs]

Then that is your problem.

[smokinwrench]

When a 2 stroke is running out of gas they get a lean mixture and this causes them to rev out of control, just switch to reserve and head for the gas can.

[Dirtcrasher]

Take your petcock apart and make sure it's all clean. Make sure the tank is venting too....

[ralphy]

Thanks everyone, you calmed my nerves a little.