Kawasaki FX850v or FX921v...

Discussion in 'Lawn Mowing Equipment' started by JDGlandscape, Apr 13, 2013.

  1. JDGlandscape

    JDGlandscape LawnSite Senior Member
    Posts: 506

    I went into a gravely dealer today to get more information and talk about ordering a 460 and I cant decide which of these two engines I should get.

    I did do some searches but I know these are two very popular engines and I figured that it would benefit a lot of people if they could share their opinions..

    It is a 60" cut and I bag about 50% of the time and then just side discharge the rest of the time on my properties. I do have some hills but nothing crazy to go up. I currently run a 52" Lazer Z HP with a 23hp kawi and that seems to do fine.

    I would prefer to get the 27 hp (formerly 31hp) 850, but I want to make sure that it will have enough power for what I do with it. I am fairly heavy too, about 235 pounds

    So basically will the smaller engine have enough power? How do these two engines compare GPH and powerwise?
  2. weeze

    weeze LawnSite Fanatic
    Posts: 8,916

    if you bag alot i would get the bigger engine.
  3. Ridin' Green

    Ridin' Green LawnSite Fanatic
    Male, from Michigan
    Posts: 14,208

    Like I said in the 460 thread, my FX850 is more than enough in my Z950, and I have the MOD deck. I can mulch grass and leaves without phasing it. mowerbrad ran a Z950 with the bagger system and he said it ran it with ease.

    It's kinda funny, but before the rating changes started taking place, no one questioned the 850 when it was rated at 31 HP, now a lot of guys do.
    I have also ran a Z960 with the FX921 which is the 31 you're asking about. Two different brands of macjhines, but the same two engines to compare in them. To be honest I couldn't tell any difference anywhere that I cut with it when compared to my 950, which is a big reason I chose the 950 instead of the 960. I'm sure there are places the added ponies might come in, or show up, but I haven't found that situation yet.
  4. weeze

    weeze LawnSite Fanatic
    Posts: 8,916

    well hmmm. you prolly won't be bagging on overgrown lawns so yeah go with the smaller engine.

    i just have the 26hp(23.5hp) kawi engine on my z920a. the biggest problem for me was the stock factory high lift blades. whenever i got into thicker/wetter stuff the engine would bog down alot. i switched to G6 blades and the difference was night and day. now it never bogs down unless the grass is 4ft tall or something. :laugh:
  5. Tharrell

    Tharrell LawnSite Silver Member
    Posts: 2,964

    My new Super Z has the 850.
    I'm impressed.
    My last mower had a Kawasaki 25 60" deck, sold it with 1200 hrs and this one makes it look weak.
    I've run the Hustler diesel and it never changes tune when getting into thick stuff, this engine is almost the same.
    I always want the most power but this engine is fine for my 60" Super Z.
    If the bigger engine had been on one at the dealership, I probably would have went with the bigger engine because I always thought before that it's better to have it when you need it but honestly this engine is pretty great.
  6. JDGlandscape

    JDGlandscape LawnSite Senior Member
    Posts: 506

    Thanks guys, I think I have made up my mind to go with the 850. I havent heard anyone say that it isnt enough

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