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LawnBoy mower speed/RPM varies

walkerstoo's Avatar

Join Date: Mar 2002
Posts: 248

05-22-13, 05:54 AM   #1  
LawnBoy mower speed/RPM varies

Mower speed cycles up/down as cut grass.........load on mower doenst seem to matter.....any ideas?? not self propelled

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Pilot Dane's Avatar
Group Moderator

Join Date: Mar 2003
Posts: 16,683

05-22-13, 09:05 AM   #2  
If you have not made adjustments to the carburetor then I would start by thoroughly cleaning it. You might have a jet or orifice clogged that is throwing the mixture off and making the governor hunt.

ilike2mow's Avatar

Join Date: May 2013
Posts: 42

05-22-13, 01:37 PM   #3  
I would thoroughly clean the carb like Pilot Dane suggested and when you do, be sure to make sure the main jet in the middle of the carb is clean. I usually take a wire from a wire brush and stick it through all the tiny holes in the sides of the carburetor and also check from the ends and see if it goes through. Make sure the needle (which is attached to the float) moves freely and doesn't get hung up because that might cause it to run roughly as you stated.

geogrubb's Avatar

Join Date: Jun 2006
Posts: 2,333

05-22-13, 04:13 PM   #4  
Please post the Model number of the mower, LawnBoy hasn't been a LawnBoy for a long time, the mower may have a Tecumseh, Briggs, Kohler, Honda or whatever engine on it, that is what we need to know. Have a good one. Geo

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