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Have changed plug and gas. hard to start but will

Have changed plug and gas. hard to start but will start at full choke and prime(prime bulb acts like no vacuum and does not come back to full shape quickly). Runs at about 1/2 choke. will triger up to full throttle run about 1 minute and then dies. Some what erractic won't stay running??

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I would suggest cleaning the carb (remove it) and air filter. There are a few really small passages in the carb that need to be cleaned which get gummed up due to the 2 stroke mixture and sitting for the winter. (Even if you drained the fuel)

DO NOT use a piece of wire or anything to clean out any small passages. Use carb cleaner and compressed air, put it back on, and see if it's better.

If that doesn't do it, a carb rebuild is in order. Not very many parts on those little buggers. If the cleaning doesn't solve it, it's most likely a bad diaphram from sitting and drying out. (Which I'm learning towards due to the lack of pressure when you prime and having it starve for fuel and die after a minute of running). There is a square plate on the bottom of the carb held on by 3 or 4 screws. That's the cover for the diaphram. Remove the screws and plate and look at the diaphram to see if it has a hairline crack, if it's sticking (there's a spring under it), or if any thing else looks out of whack.

Posted on Apr 29, 2010

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