I have an old craftman mower. It starts right up after 5 quick
primes, but then the only way to keep the mower running is to push the
primer button every three seconds. If you dont push it, it just runs
for about 5 seconds and then dies. Why?
Take the drain plug out of the bottom of the carburator bowl and let an
ounce of dirty gas drain out. While the drain plug is out, clean the crud
out if the hollow in the drain plug. There's supposed to be some kind of
jet in there. When it's partially plugged up, or there's just a little
water in the carburator bowl, it will act just like that.
Also check for a small crack in the priming bulb.
two things i think of: 1-remove gas cap and then start it up.. if it
keeps running then you need to clean the gas cap.. the vent hole is
2- the carb. is dirty and not letting gas into
the engine... when you prime it you bypass the little opening where the
gas comes out to the engine... after the gas in the primed area is
burned up it will kill... kinda like telling you someting- the carb. is
firstname.lastname@example.org (Nathan) wrote in message
OK experts, a related problem: same type mower and almost same type
Ditto all the OP's comments, except after about the third time of
repriming it will run ok. It doesn't matter if you push the primer
bulb 5 times, 8 times, or 10 times - it will run for a few seconds
then quit. After the 3d time of doing this it will start & run ok.
This would make me think the problem is not a dirty screen, bad fuel
pump, or clogged jet. What else??
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