tweaking the RPM's

Discussion in 'Lawn Mowing' started by FYS777, Jun 11, 2009.

  1. FYS777

    FYS777 LawnSite Silver Member
    Posts: 2,305

    how many of you or any, have tweaked the RPM's on your mowers??
     
  2. Jason Rose

    Jason Rose LawnSite Fanatic
    Posts: 5,858

    Always. Any mower I've bought, new and used, gets checked with a tach to be sure it's running at the proper rpm's. Too low = poor cut and it's harder on the drive system. Too low rpm's also is bad for the engine, if it dosn't turn fast enough, the fan isn't moving enough air to keep it properly cooled. Too fast is bad too, but the actual high rpm setpoint is debated, and varies depending on the machine. Most recommend 3600 rpm "no load". But some go as high as 3800 and as low as 3000. I keep everything as close to 3600 as I can.
     
  3. FYS777

    FYS777 LawnSite Silver Member
    Posts: 2,305

    I agree, higher end is much better for sure.
     
  4. lawnman7

    lawnman7 LawnSite Member
    from CT
    Posts: 13

    how do u tweek them?
     
  5. LawnScapers of Dayton

    LawnScapers of Dayton LawnSite Silver Member
    Male, from Dayton, OH
    Posts: 2,573

    on the Kawi's there is a plate on the front of the engine that slides up and down......there are 2 screws that hold it in place. Loosen them and slide it up.......but make sure the throttle is set at full on before you do anything.
     
  6. FYS777

    FYS777 LawnSite Silver Member
    Posts: 2,305

    ha ha, I should say almost every engine has a way to set the RPM's up or down to get maximum performance out of them, I have found that some times when mowers get older, or even new one's aren't running at high enough RPM's so you adjust them up so the engine runs faster,:clapping: another wards TWEAKED
     
  7. Brad Ent

    Brad Ent LawnSite Member
    Posts: 228

    We moved the plate and still can't get enough rpm our of our 23HP Kawi.
    Should we try a shorter spring??
     
  8. Brad Ent

    Brad Ent LawnSite Member
    Posts: 228

    We moved the plate and still can't get enough rpm on our 23HP Kawi.
    Should we try a shorter spring??

    Corrected
     
  9. LawnScapers of Dayton

    LawnScapers of Dayton LawnSite Silver Member
    Male, from Dayton, OH
    Posts: 2,573

    someone else will have to comment....never had that issue
     
  10. dwost

    dwost LawnSite Bronze Member
    Posts: 1,666

    Not sure what the problem is. Could be a stuck or stretched cable? Check all the linkages and make sure nothing is binding. I've done this on every mower I've owned. I run mine at 3600 no load.
     

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