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Old 04-20-2014, 12:18 PM
BillWil BillWil is offline
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Join Date: Sep 2005
Location: Central Michigan
Posts: 75
Engine difficult to start

The Honda engine on my 21 inch self propelled mower would not start this spring. I checked the spark and all was well, I checked the flow of gas from tank to carb and all was well. Spark plug was new went I put it up for the winter but I pulled it out to check it - - no gas in the cylinder.

I had drained the tank, run it dry, and drained the bowl last fall. Anyway I sprayed some carb cleaner into the air intake to see if it would briefly. It did so I went about checking every thing again and found fuel in the bowl, but none in the carb and then tried the cleaner in the intake again. Instead of stopping it continued to run and has started and run since.

I know I am looking a gift horse in the mouth, but what would cause that to happen?
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Old 04-20-2014, 01:02 PM
kgs1 kgs1 is offline
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Join Date: Apr 2013
Location: hulbert,mi
Posts: 146
Dirt or minute particles in the carb that sucked through and basically cleaned itself out! If you have little particles in the small jets etc, it will make it run funny or not at all so when you sprayed the cleaner in it, it probably went through the system. If it happens again, take carb off and clean it thoroughly jets and all.
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Old 04-21-2014, 01:39 PM
BillWil BillWil is offline
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Join Date: Sep 2005
Location: Central Michigan
Posts: 75
Thanks, I'll do that.
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Old 04-22-2014, 01:03 AM
herler herler is online now
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Join Date: Apr 2012
Posts: 4,671
You probably need to replace the air filter.

Understand these engines suck air, and it is the passing flow of air going through the carburetor that draws fuel from the bowl.
Clogged air filter, no air flow, no fuel either.
Insufficient or weak air flow can do it too.

Granted it's an unlikely problem, but I'd still replace that air filter unless it's new.
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