lawnboy rpms

Discussion in 'Mechanic and Repair' started by grasskeeper, Oct 31, 2002.

  1. grasskeeper

    grasskeeper LawnSite Member
    Posts: 29

    I've got a commercial style lawnboy, and its just not running as fast as I would like at high speed. Does anyone know if there is any way to adjust the top speed? thanks
     
  2. If throttle is open all the way then adjust governor to gain high end rpm's.
     
  3. grasskeeper

    grasskeeper LawnSite Member
    Posts: 29

    I appreciate the advice Bob. But I am a little, no alot, mechanically impaired. I don't feel like lugging the mower to the shop for something so simple. Can you walk me through it a little bit. Thanks
     
  4. This is probably not exactly your carb but find the governor spring by the carb. The part with the arrow- bend it out very slightly, by gripping the vertical part, to increase rpms. Best to use a tach so you don't increase too much. If you are not sure after looking at carb send me engine # and I will see if I have pic of your carb.

    governor.jpg
     
  5. grasskeeper

    grasskeeper LawnSite Member
    Posts: 29

    thanks Bob. I'll give it a try tomorrow and see what happens. I really appreciate your help.
     
  6. ksland

    ksland LawnSite Senior Member
    Posts: 927

    That picture is of a briggs carb, Lawnboy 2 cycle uses plastic carbs. There is a spring loaded wing vane style governor on the top of the carb sticking into the blower housing. There are clickable "steps" on the circular vane that increases or decsreases the spring tension for the governor which in turn allows it to rev higher or lower. Just take it one click, start it, and try again and so on.
     
  7. vipermanz

    vipermanz LawnSite Bronze Member
    Posts: 1,773

    here's another lb carb[​IMG]

    you can see the rpm adjuster, it's under the air vane
     
  8. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    For those of you who don't know what an air vane is the part you want to rotate is #5.
     
  9. grasskeeper

    grasskeeper LawnSite Member
    Posts: 29

    I haven't had a chance to adjust it yet but this is exactly the type of advice I was looking for. Thanks alot. You guys have been a big help.
     
  10. vipermanz

    vipermanz LawnSite Bronze Member
    Posts: 1,773

    thanks richard!!!, i forgot to add that detail:blush:
     

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