19 HP Kawasaki FH601V engine hp upgrade?

Discussion in 'Mechanic and Repair' started by clif, May 19, 2010.

  1. User Name Taken

    User Name Taken LawnSite Member
    Posts: 92

    Hate to say it but you may come out cheaper to get it at the dealer. No shipping but probably $10+ on the decal itself.
  2. clif

    clif LawnSite Member
    Posts: 135

    Yea, they don't charge me to ship... just didn't want to drive there, but to save $10 I will. Unless someone knows of free shipping elsewhere.... Thanks
  3. clif

    clif LawnSite Member
    Posts: 135

    If you could use the extra hp I say go for it anyway, the shop will never notice the subtle difference unless you point it out to them as underpsi mentioned earlier. If something goes wrong later with your engine, don't mention anything about the mod to them, just let them fix it, and I wouldn't change the sticker just yet either until that warranty expires... :laugh:
  4. nepatsfan

    nepatsfan LawnSite Gold Member
    Posts: 3,142

    This is some good info
  5. WillRyan

    WillRyan LawnSite Member
    Posts: 17

    Is it possible to do this mod with the FH580V 19hp Kaw? Its on the new Scag Tiger cats

    If I can't buy I new shaft could I atleast grind down the factory one?
  6. fatboynormmie

    fatboynormmie LawnSite Bronze Member
    Posts: 1,103

    I don't think this mod will work on your engine as the fh580v is a different engine series and displacement .The fh601v to the fh721 are the same displacement with the only real difference between them is the carb shaft and on the fh721 it also has an oil cooler.
  7. clif

    clif LawnSite Member
    Posts: 135

    I think fatboynormmie is correct. Your 19 hp replaced mine, as they no longer produce it in the 675cc block. Your engine cc size is smaller, and I think if I can remember correctly, you have the bigger hp engine of your series, I believe the other was a 17 hp. Of course, you could always pull the carburetor and check to see how far the valve opens... but something tells me you are already maxed out in hp.

    Not that this matters to you, but just looking at other kawasaki engines, it looks like you could maybe boost the 34 hp to 37hp, and I think the 27 hp to 29 hp, assuming all the other stuff is the same like the FH601v vs. FH721v. The FX series I'm talking about, newer engines. Some food for thought when purchasing a new mower... go for the smaller "upgradeable" engine on the same mower to save hundreds of $$$. :)
  8. WillRyan

    WillRyan LawnSite Member
    Posts: 17

    Dang, oh well. But one of these days I'll check on the valves and see what I can do.
  9. clif

    clif LawnSite Member
    Posts: 135

    The thing that bothers me is that any mower manufacturer (most around here are guilty of this) would even consider a small 19hp engine on a full commercial mower, like mine, 9mph with a 52" deck. Don't even think about cutting tall and thick grass, let alone wet clovers. You will bog down or kill, and be forced to cut it extra tall, really slow, and twice. Talk about inefficient. Guess that's why they did away with the mini z's.
  10. farmersfeedu

    farmersfeedu LawnSite Member
    Posts: 19

    what is the part number for the shaft on a 23 hp kawi. I also have a FH series 19hp but I think 23 hp would be plenty.

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