putting a larger engine on a mower.

Discussion in 'Lawn Mowing' started by DillonsLawnCare, Nov 11, 2007.

  1. DillonsLawnCare

    DillonsLawnCare LawnSite Bronze Member
    Posts: 1,100

    hey guys, i was just curious if there is any problem with putting a bigger engine on a mower. for exapmle, my walkbehind has a 17hp Kawi and its a 52" cut. if i put something wicked like a 25+ Kawi horsepower engine on it, would it mess something up? bend something? to many rpms for belts/pulleys?i was just wondering cause ive seen other people doing this. thanks
     
  2. Skyking

    Skyking LawnSite Member
    Posts: 216

    Weight & Shaft size I would think would be the only concern
     
  3. Sweet Tater

    Sweet Tater LawnSite Silver Member
    Posts: 2,123

    I don't know whats invovlved in the change, but yes it can be done, my exmark ztr came with an 18hp and now has a 23hp on it.
     
  4. DillonsLawnCare

    DillonsLawnCare LawnSite Bronze Member
    Posts: 1,100

    like, would the more rotations take a tole on my blades/deck/belts?

    would it increase quality of cut? less bogging down?
     
  5. outlaw1960

    outlaw1960 LawnSite Senior Member
    from denver
    Posts: 307

    same rpm, more torque. should be fine unless you go for insane sizes......my 44" toro hydro has a 20 hp kohler.....outlaw
     
  6. DillonsLawnCare

    DillonsLawnCare LawnSite Bronze Member
    Posts: 1,100

    so it will cut the same. but more power. ???
     
  7. BanvilleLawnCare

    BanvilleLawnCare LawnSite Member
    Posts: 190

    It seems to me like it would just burn more gas. Was the 17hp kohler not enough or is this just kinda like a what if question?
     
  8. DillonsLawnCare

    DillonsLawnCare LawnSite Bronze Member
    Posts: 1,100

    its a kawi, but both.
     
  9. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,327

    Might want to look at the cost of a 25HP kaw....it is going to be high.
     
  10. Juan_Deere

    Juan_Deere LawnSite Senior Member
    Posts: 301

    Might want to compare the specs on the engines also. Many times, a certain range of engines are identical, even though the HP differs. The only difference is the carburetors, so there is no need to buy a whole new engine.
     

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