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This is a lawnboy mower about twenty years old and has run fine intil about a week ago. Now...after starting...It will surge up and down at full speed...then start to bog down unless throttle is placed in the "choke" position. Then will run a little bit longer...then die. Because it will run in the "choke" position, does this indicate it is not getting enough fuel (running too lean)? I placed 2 oz of sea foam in with the fuel...but doesn't seem to help (unless I haven't waited long enough to have it work into the fuel line). Any advice would be appreciated.

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Drain all gas out of the tank and carb the new gas with 10% ethenal is ruining old gas engines after everything sits for a day install a plastic shut off valve in gas line. put high test gas with the seafoam then turn gas valve off after every use it will run good. then call your congressman and complain otherwise we will all be replacing any engine older than 4 years old

Posted on Sep 15, 2010

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