Question about Mtd Yard - Man 160cc, 21" Self - Propelled Lawn Mower

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Have a self propelled yardman mower with a 6.5 hp Honda engine. First 3 years never had an issue with the thing starting. Past 2 years it has been a battle. I have read of a few similar situations on this site. Here is what I have done to this point. I have replaced the plug and air filter. Drained the fuel tank and Carb. removed float bowl and cleaned with carb cleaner. Replaced fuel lines. changed and checked oil level made sure the micro switch on the safety shut off was permanently in the (I assume closed position) it is mechanically pushed in. I have spark to the plug...and I can remove the drain plug on the carb and have fuel coming out. All I am getting is at best a 2-3 second firing of the engine and at worse back fires and fowling of the plug. An observation I have made (not sure if it is the root cause) is sometimes if I mess with the linkage coming from the back of the engine and going to what controls the butterfly's on the carb (and you have to do this for 2-3 minutes) the engine will run fine. That is if you can get it to fire to begin with. Not having any idea how that system works or if it what I am doing is just a band aid for the actual cause. My question is. What do I need to do? I appreciate any suggestions and advice. Thanks....Stuck in tall grass.

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U may want to check the coil make sure it is keeping fire to the plugs and make sure the plugs is not getting to much fuel to them make sure u do not flood the cabuerator out then get back with me let me no what else it doin get back to me at RobJ799@ymail.com

Posted on Sep 13, 2010

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