IN 2013 I bought a MTD 21' mower with a 139cc Powermore engine,Model 11A-AOJT706. After priming,it will run for about three seconds then stop.After doing this many times, will not start. I put in a new spark plug,took off the carb, and it was clean.Put in fresh gas. What else can it be?
Did you empty the carb bowl and clean out any old fuel & contaminants? This is the most effective way to determine fuel issues. It also gives you the opportunity to remove all old fuel from the fuel lines, filter, & drain the tank bone dry. You may have already introduced water from your previous efforts so take out the plug & pull the cord a few times to dry out the cylinder. Next start the first time with starter fluid since you may still have contaminants in the primer system. In the future use only non-ethanol fuel, a marine grade stabilizer such as "Sea Foam" and replace all fuel every spring. Fuel begins to varnish and break down after 1 month unless stabilizer is used. Ethanol gas absorb water from the surrounding air in about 2 months & only gets worse.
Testimonial: "Well, I took off the carb, used a compresser and carefully cleaned all out. Put it back together, primed, and it started,and stayed running!!! Thank You."
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