I noticed there is some confusion among the Kawsaki engines.

Discussion in 'Hustler Turf Equip (Archived)' started by lanieluke, Jun 22, 2006.

  1. lanieluke

    lanieluke LawnSite Member
    Posts: 7

    Everyone seems to think that the 19,23, and 25 hp models have the same displacement as most are led to believe by the incorrect information that hustler provides on their product specs. I am sure that this is just a misprint, but this is the information straight from the Kawasaki website:

    19hp = 35.7 cu. in. or 585 cc. 19hp @ 3600rpm and 36.6ft. lbs. @ 2000rpm
    Weight = 71.2lbs.

    23hp = 41.2 cu. in. or 675 cc. 23hp @ 3600rpm and 39.8ft. lbs. @ 2400rpm
    Weight = 88.2lbs.

    25hp = 41.2 cu. in. or 675 cc. 25hp @ 3600rpm and 41.3ft. lbs. @ 2400rpm
    Weight = 90.2lbs.

    So it can be seen that these are not the same engines with different carb settings. While the 23 and 25hp motors are the same displacement the the 19hp is on 585 cc's and weighs almost 20lbs. less than the other two engines. I hope this helps clear up some people's confussion among these tricky kaw power engines.
  2. gps_jetskier

    gps_jetskier LawnSite Senior Member
    Posts: 303

    No confusion here. 23 and 25 are the same motor with different carb setups somehow.

    I'd still like to know what it takes exactly to turn my 23 into the 25 though. There must be carb mods that can be done to do this. Everyone seems to just guess though. No one has any part numbers or details.

  3. lanieluke

    lanieluke LawnSite Member
    Posts: 7

    Well, I stand corrected. I just went out and looked at my 19hp motor. Low and behold Displacement:675cc's turns out kawasaki makes a 585 and 675cc 19hp mower. Everyone else was right. So what makes the motors 19,23,and 25 hp if they all displace the same amount? Oh well, sorry about that!
  4. gps_jetskier

    gps_jetskier LawnSite Senior Member
    Posts: 303

    Seems to be the carb setup. Can't get anyone to confirm exactly what though. Prolly don't want to really. If you can get a different carb kit for $50, then no one can justify the added expense for the next size motors.

  5. lanieluke

    lanieluke LawnSite Member
    Posts: 7

    Haha, True, but that does not stop me from wanting to squeeze a few extra horse power out of my kawasaki if it is as simple as putting on a 23 or 25 hp engine carb. Well, I will keep on the lookout to find out if this upgrade is possible.
  6. blackandgold

    blackandgold LawnSite Senior Member
    Posts: 365

    What are the specs of the KAI series engines?
  7. gps_jetskier

    gps_jetskier LawnSite Senior Member
    Posts: 303

  8. pugs

    pugs LawnSite Gold Member
    Posts: 3,022

    the FH 601, 641, 680 and 721 (19/21/23/25) are all the same 675cc displacement.

    The newer 19 HP engine is smaller. The FH 541 and 580(17/19) are both 585cc.

    And then the smaller twins all share the same displacement which is like 472cc.

    The KAI just adds a nicer air filter setup. If you get an FH430V it will have a clip on the front type air filter setup. If you get a FH430V KAI it will have the high mount air filter(not the donaldson).

    REALSLOW LawnSite Senior Member
    from FLORIDA
    Posts: 668

    What this means is that the 19 should be the real animal for longevity and torque. If they are getting 6 more HP through carburation they have to be turning more RPM and that hurts reliability not to mention you usually trade RPM HP for torque. I have the 19 601 on a 52 MIDSIZE and it is a real animal :weightlifter: way more powerful than my 60 SUPER Z with the 27 HP Kohler.

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