20 HP Underpowered?

Discussion in 'Lawn Mowing' started by grasssin, Nov 10, 2003.

  1. grasssin

    grasssin LawnSite Senior Member
    Posts: 361

    A 20 hp kohler engine, is it underpowered for a 52" deck?
     
  2. TLS

    TLS LawnSite Fanatic
    Posts: 7,937

    Walkbehind,....Not really.

    ZTR,.......Yes.
     
  3. dvmcmrhp52

    dvmcmrhp52 LawnSite Platinum Member
    from Pa.
    Posts: 4,205

    For me,yes. For a homeowner....probably not. I'm sure others will have a different opinion though.
     
  4. dvmcmrhp52

    dvmcmrhp52 LawnSite Platinum Member
    from Pa.
    Posts: 4,205

    Good clarification TLS. I was thinking ztr.
     
  5. Pecker

    Pecker LawnSite Bronze Member
    Posts: 1,454

    Well . . .according to my old realiable arithmetic methods, that would be slightly more hp per inch than a 25hp/60", which I have found to have plenty power under expectable operating conditions (and running a mulch kit). Of course, the 25hp I'm referring to is a Kawi v-twin which would have slightly more torque, thus balancing out the difference, making them relatively equal. My opinion, 20hp/52" is not underpowered.
     
  6. TLS

    TLS LawnSite Fanatic
    Posts: 7,937

    Yeah, but 20 horse Kohlers were always dogs. Very low on torque.
     
  7. PaulJ

    PaulJ LawnSite Bronze Member
    Posts: 1,776

    You can never have too much power. I love the 23hp on my 48" walkbehind. I use a sulky most of the tome so actually it's a ride behind. I have bogged it sown a couople times grinding leaves. wo I don't think it's too much. I would rather hae extra hp than not enough.

    I did have a 20 hp on a 52" walkbehind for a while and it did OK but it did bog some and it was slow. I mean you had to go slow to get a good cut.

    The trend lately is to more hp. so why not.
     
  8. Albemarle Lawn

    Albemarle Lawn LawnSite Bronze Member
    Posts: 1,544

    I have a John Deere 17HP 1cylinder walk behind 54" deck.

    Plenty of power.

    2" less, and extra cylinder, and 3 more horses?

    If that Kohler is running right, you might be OVER powered.
     
  9. TLS

    TLS LawnSite Fanatic
    Posts: 7,937

    Overpowered? Whats that?

    Your 17hp One Holer Kawi is 27.5 ft/lbs torque.

    A 20hp Kohler twin is 32.6 ft/lbs torque.

    Two TOTALLY different engine classes.

    Neither would EVER be considered OVERPOWERED on a 52" deck.

    Minimum I'd want on a 52" is 25hp Kohler or a 23hp Kawi. both in the 41 ft/lb. range.
     
  10. grasssin

    grasssin LawnSite Senior Member
    Posts: 361

    not for a walkbehind, for a rider
     

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