Run the 18 HP Cub Cadet 90 minutes, take a break for an hour, then the
Cub won't start, regardless of whether I use full choke, partial
choke, or no choke. Battery is OK. Next day, tractor starts fine, no
Is the engine still overheated after a one-hour rest? Any tips.
I just had that exact thing happen with my 20hp Cadet. After MUCH work,
the repair people discovered it was a "bad coil" or something which when
heated up failed and when cooled way down was OK. I was told that they
had to pull the engine to get at it so the repair bill was pretty high.
Assuming no shenanigans (sp?), they did a fine job and I consider the
$ worth it. The machine is over 15 years old and runs like a top!
What you have is a classic case of "vapor lock". You can turn the gas valve off
and run the starter for 20 seconds and then give it gas again on no choke and
try it. or you can cool down the carburator by running water on it.
check and see if you are getting any fire(spark) from the spark plug
wire after it kills and wont start...that is where i would look first..
it might be the coil heating up and doing that...if thats OK then you
check the spark plug(a spark plug that is contaminated with deposits
will start up fine and glow when hot and act like its firing all the
time and not let the engine run at all.. once the engine cools down the
spark plug will cool down and act OK and the engine will run fine until
it heats up and do the same thing again.. we had a car back in the 50's
that did that once a week on our trip to the park.. my dads car would
conk out in the same spot each trip.. wait an hour and start right up..
On Mon, 08 Sep 2003 22:12:05 GMT, firstname.lastname@example.org (BroJack)
When it refuses to start, pull a spark plug and check and see if you
have a nice hot blue spark. If not it more than likely is a bad
ignition coil. They are more apt to fail when they get hot. If its got
a good spark I would look at the carb running a bit to rich, and
possibly cause it to flood when shuting down. This may be from some
trash in the bowl and getting under the seat of the float inlet valve,
or an adjustment. More than likely its a bad coil or trash in the
carb, or possibly a filter.
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