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5 hp

Discussion in 'Mechanic and Repair' started by the ace, May 28, 2009.

  1. the ace

    the ace LawnSite Member
    from usa
    Posts: 147

    Was wondering if any one knows how much hp can you get out of a 5hp honda engine if you did some modifications to it? I have about 20 lawns where anything larger than a 21" mower is not an option and after buying a commercial 21" toro I'm just not impressed with the power at times so I was wondering if, a.) it's possible to monkey with the engine and get some serious power out of it and b.) is it even worth it?
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    The only thing I would suggest is putting a tachometer on the engine and make sure the high speed rpm's are set at 3600, Anything more is just asking for trouble.
  3. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    Most 21s come out of the box at about 2800 rms - 3000 rms. So bump it up to 3600 and you should be happy.

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