cub fuel problem

Posted by John Boudreau on September 25, 2005 at 18:47:35 from (205.188.117.73):

I have 55 cub. It starts and runs fine for about 5-10 minutes then quits. I can see that there is NO fuel getting to the carb when it quits as the clear fuel filter is dry. I have done just about everything I can think of to fix the problem, e.g.
#1. removed the petcock assembly and gas bowl and filter. Took all part, nothing blocking found, blew out with air. Gas still stops flowing. Petcock and fuel bowl assembly is a year old
#2 drained the gas tank, dried and blew out with air. problem continues
#3 took carb apart. Expected to find varnish or something but it was spotless. remove needle vlaue, idle screw etc., all appear in good shape blew out with air reammemsbled. Starts and quits after a short time

Almost forgot I checked and cleaned out the fuel lines (1st thing I did + I reaplced the fuel filter)

It appears there is the fuel line is getting a vacum lock which stops the flow of gas. If the tractor sits idle a few minutes the gas will again begin to flow. I can get the gas to flow again immediately if I disconnect the fuel line and syphon it by mouth gas will flow fine the tractor will restart and run 5 to 10 minutes before the same thing happens again. I'm open for suggestions, Thanks, JB

Follow Ups:

• Re: cub fuel problem Rudi 11:14:47 09/26/05 (0)
• Re: cub fuel problem Nat 05:50:29 09/26/05 (0)
• Re: cub fuel problem old 19:18:07 09/25/05 (0)
• Re: cub fuel problem El Toro 19:08:04 09/25/05 (0)

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