GZ 250 Forums - View Single Post - won't start

mrlmd1 · 11-02-2009, 05:58 PM

Let's start off the discussion with what you mean by "bad gas"?
Sediment?, water in it?, old, where all the volatile explosive vapors have evaporated?
Gas can last a year and still be OK if there's no water in it, sediment could clog filters or carb jets, so just emptying out a gas tank and starting over may not be the solution to your problem, but it's an OK place to start looking if you suspect that.
Just my comment that if you had "bad gas" it would be unlikely to run fine, then suddenly stop, then run OK again, then suddenly stop again. When it was running, was it smooth as usual, or rough, missing, backfiring, anything unusual? Lousy gas usually makes an engine run lousy.
You may have some other problem,like an intermittent electrical disconnect, short, something else. Even a faulty side stand switch or other cutoff.
How did you check the spark plug firing? Did you remove it and look at the spark? If changing the gas and trying to clean the carb doesn't work, look for some electrical problem.

11-02-2009, 05:58 PM	#6
mrlmd1 Senior Member Join Date: Jan 2008 Location: Crawfordville, Florida Posts: 2,853	Re: won't start - bad gas? Let's start off the discussion with what you mean by "bad gas"? Sediment?, water in it?, old, where all the volatile explosive vapors have evaporated? Gas can last a year and still be OK if there's no water in it, sediment could clog filters or carb jets, so just emptying out a gas tank and starting over may not be the solution to your problem, but it's an OK place to start looking if you suspect that. Just my comment that if you had "bad gas" it would be unlikely to run fine, then suddenly stop, then run OK again, then suddenly stop again. When it was running, was it smooth as usual, or rough, missing, backfiring, anything unusual? Lousy gas usually makes an engine run lousy. You may have some other problem,like an intermittent electrical disconnect, short, something else. Even a faulty side stand switch or other cutoff. How did you check the spark plug firing? Did you remove it and look at the spark? If changing the gas and trying to clean the carb doesn't work, look for some electrical problem.
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