Re: Re: Re: Re: Re: Re: What makes a gas engine run rich

Posted by Paul Vance on March 03, 2001 at 19:19:24 from (64.209.134.135):

In Reply to: Re: Re: Re: Re: Re: What makes a gas engine run rich posted by Gene on March 03, 2001 at 14:41:18:

Gene, on monday, order the proper main jet. On sunday, check your fuel pressure!! If you have WAY! too much pressure gas will leak from the carb while the tractor is running(poorly). If you have just a little too much pressure, fuel will be pushed passed your needle valve and fill up your bowl, the extra gas will be sucked into your intake, causing a slight rich condition(tractor still runs decent). Did you check float level with tractor running? Even if you did, check pressure.
Also, what is your altitude? I live at 7000ft atmosphere psi is avg. 11.6 roughly 20% less o2 than at sea level. Any carboureted engine that is brought here from sea level will run exactly as you describe yours running until you decrease mainjet size by one quarter. This may not apply to you but I see it very often here. (Santa fe NM.) Let us know your results> Paul Vance

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