HTHM Posted June 7, 2009 Report Posted June 7, 2009 I have a 4 stroke lawnmower that runs poorly. It will not stay at one speed,but rather revs up and then revs down and revs up and revs down. Is there an easy fix to this? Air filter is clean, fuel is fresh and I do not know much about carburators. So if it is a matter of turning a screw, let me know where the screw would most likely be located, please. Thanks in advance.
Spiel Posted June 7, 2009 Report Posted June 7, 2009 Hmmmm, might have to change the handle to Hometownman, would you like me to look after it. Sorry I have no further advise.
HTHM Posted June 7, 2009 Author Report Posted June 7, 2009 Hmmmm, might have to change the handle to Hometownman, would you like me to look after it. Sorry I have no further advise. Dang it Jim, I'm a carpenter/plumber/landscaper/electrician not a mechanic!
Spiel Posted June 7, 2009 Report Posted June 7, 2009 Dang it Jim, I'm a carpenter/plumber/landscaper/electrician not a mechanic! Touche.
Greencoachdog Posted June 7, 2009 Report Posted June 7, 2009 (edited) The screw will be on the carburator eh!!! There will probably be one or 7... but probably only one, turn the screw all the way in and back it out 1 1/2 turns... start your lawn mower and then slowly turn the screw in and out until you find the sweet spot where it runs the best. You may want to install a new spark plug before you do anything. Hope this doesn't help!!! btw, the screw you're looking for will have a spring around it. Edited June 7, 2009 by GCD
Big Cliff Posted June 7, 2009 Report Posted June 7, 2009 Fix is easy! Go fishing at Sturgeon Lake next Saturday, I'll fix your lawn mower, you catch fish!
Garry2Rs Posted June 7, 2009 Report Posted June 7, 2009 Albert; Bring it with you on Friday and we will get Mike to look at it. Garry
Fisherman Posted June 7, 2009 Report Posted June 7, 2009 A lot of the newer mowers no longer have adjustable carbs other than the idle set speed screw. Most likely the problem is called put it away in the fall, forgetaboutit disease, then come spring it's expected to run like new. Either get the carb interior cleaned by someone who knows how, add a good shot of Seafoam to the gas and let it run a while. It removes the gum and varnish from the interior of the carb. Sparaying carb cleaner down the throat is mostly a complete wate of time and carb cleaner.
Muskieman Posted June 7, 2009 Report Posted June 7, 2009 SEAFOAM!! or get a Goat... you'll have fertilizer the grass will be cut and the kids will have a pet. RFS
HTHM Posted June 7, 2009 Author Report Posted June 7, 2009 A lot of the newer mowers no longer have adjustable carbs other than the idle set speed screw. Most likely the problem is called put it away in the fall, forgetaboutit disease, then come spring it's expected to run like new. Either get the carb interior cleaned by someone who knows how, add a good shot of Seafoam to the gas and let it run a while. It removes the gum and varnish from the interior of the carb. Sparaying carb cleaner down the throat is mostly a complete wate of time and carb cleaner. I think you have the diagnois there! Big Cliff is gonna get her running properly for me. And then I get a lecture on what I was doing wrong. Education is a good thing! Thanks Cliff!
dave524 Posted June 7, 2009 Report Posted June 7, 2009 I'd be more inclined to think it was a weak governor spring rather than a carb problem
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