I have to prime my engine to get it to go. It will run at idle with
choke on; once warmed up it idles with choke off. If I try to rev up,
it starves and dies. I have checked the fuel filter, tank, and see no
problem. I also checked the fuel pump (dia. type on front of carb),
and it looks ok -- didn't see any problems with the diaphragm or
springs. I don't see the typical fuel in the inlet chamber that you
normally see. There is also very little fuel visible in the filter
when it is running. I also pulled the vacuum line off the bottom of
the fuel filter with it running. It kept running, and I could feel
some vacuum when I put my finger over the end of the line (BTW, how
much vacuum should it have?). Definitely no fuel line clogs.
I shut it off last year, but did put stabil in it and ran for several
minutes before shutting it off.
Any ideas here?
2 things check if your choke is properly adjusted remove airfilter put chock
on and look to see if it closes the venturi of the carb all the way.
If it dies when you go from idel to high speed (when engine is at operating
temp) the low speed circuit is too lean and is either misadjusted or has a
pluged circuit in the carb.
Choke appears to work properly. Engine dies right-away when
throttling up. No adjustments were done on this tractor, but just in
case, where and how do you adjust the low speed circuit? Would
putting in a carb rebuild kit do the trick?
Lastly, what is the proper vacuum for the fuel pump vacuum line? I do
get some suction, but wonder if there is enough. I hate to tear into
the carb just to find out later that fuel pump suction line didn't
have enough vacuum.
Special tools no , but real carb cleaner to soak the carb costs a bit,
sometimes you can see the piece of dirt, do you have an external fuel
filter, It suprises me that allot of good motors come without them
One thing a lot of folks don't check is the gasket between the carb and the
side of the engine. If this gasket is loose, or leaky, it makes it nearly
impossible to start. (Needs ether or gas in the air intake to start).
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