Super Z Made New (Pictures)

Discussion in 'Lawn Mowing' started by puppypaws, Nov 8, 2012.

  1. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,177

    2006 Hustler Super Z with newly installed Kohler 28 EFI engine, hydraulic pumps, wheel motors, Michigan Suspension Seat on flex base, blade spindles, electric clutch, wiring, relays, hoses, belts, control panel, and muffler. The deck was leveled and the pitch set at 1/4", any rust spots were prepped, primed and painted.

    The mower really looked good before I cut a large area of very dusty grass and leaves with no wind to move the dust away.

    I will say this mower starts and runs better than my new Super Z with the 35 carburetored Kawasaki. Fuel injection is by far superior, which people should realize from the vehicles they drive, I doubt seriously anyone would say they prefer a carburetor over fuel injection.

    I've seen remarks made about Hustler's HyperDrive Hydraulic System being smoother than the old style hydraulics, since I own both a new HyperDrive System, and now new pumps and wheel motors from the old style system, I can tell you without reservation this is not true. My old mower operates just as smoothly as the new mower, the only difference being is the old hydraulic system is somewhat freer feeling (which my wife likes better), it takes a little more effort to move the steering levers on the HyperDrive system.

    I have more blow-out on the new VX4 deck by far, and yes, I know you can drop the skirt down into the "A" hole position to help this, but I've heard others speak of hitting objects and bending the skirt. I try to run fast enough to leave the blow-out behind, but in many places this is impossible, and now with the dry weather and leaves to move, I will use the XR-7 deck which does an excellent job with no blow-out.

    I checked the speed and actually picked up 1/2 mph with the new engine, whereas with the new pumps and wheel motors and old engine I had lost the same 1/2 mph. This means the mower is back to its original speed of 13.2 mph.

    I would love to hear the theories on how the old engine could not achieve the same speed; even with both engines turning the same rpms (3650)?

    I attaching a photo which is not doing the cut justice due to grass being in a very dry state, while also going into dormancy from cold weather. I am moving leaves, and the XR-7 deck is doing an exceptional job of breaking them into smaller pieces and moving them completely out of the cut in one pass.

    I am still extremely impressed by the older style XR-7 deck, and the ride with flex forks, flex seat base, and new Michigan Suspension Seat is excellent, even at the 13+ mph top speed, and yes, contrary to popular belief this mower will cut grass at its top speed and do an exceptional job.

    I noticed on the Hustler web site they have now lowered their Super Z speed to 14 mph on the Parker wheel motor machine, and raised the speed to 16 mph on the HyperDrive machine I have. How they do this I honestly don't know, I have yet to check, or have anyone else check a Super Z that achieved its advertised top speed. My old mower is at 13.2 mph, and the new HyperDrive machine is at 14.2 mph, these speeds are not checked by GPS (which will get you to within 1/2 mph depending on satellite location), but are checked by distance and time, the same as it done when calculating drag car speed, the most accurate means possible.

    HUSTLER (NEW 28 EFI 11-9-12) 001.jpg

    HUSTLER (NEW 28 EFI 11-9-12) 003.jpg

    HUSTLER (NEW 28 EFI 11-9-12) 004.jpg

    HUSTLER (NEW 28 EFI 11-9-12) 002.jpg

    HUSTLER (NEW 28 EFI 11-9-12) 006.jpg
  2. LandFakers

    LandFakers LawnSite Fanatic
    from CT
    Messages: 6,309

    Looks good, nice and clean. Those Hustler sure are fast. My exmark does 8mph.
  3. LibertyFarmLandscaping

    LibertyFarmLandscaping LawnSite Bronze Member
    from NE TX
    Messages: 1,091

    Looks great. Have you tried the new gramar seats? They are awesome.
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  4. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,177

    No I haven't, but they sure look very comfortable!
  5. StanWilhite

    StanWilhite LawnSite Silver Member
    Messages: 2,397

    The "A hole position"??? Oh no he di-ent! :laugh::laugh: Sorry couldn't resist.
    Man a fuel injected engine is so much better than a carbed engine there's no comparison. Ease of starting and efficiency can't be beat. As you said, anyone with a fuel inj engine in their car or truck has got to realize that. Congrats!
  6. LibertyFarmLandscaping

    LibertyFarmLandscaping LawnSite Bronze Member
    from NE TX
    Messages: 1,091

    Yes, they are very comfy. I tried one out at Retrodog's yesterday all over the rough area behind his shop. It was very nice!
  7. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,177

    What exactly did you run at Retrodog's?
  8. Realslowww

    Realslowww LawnSite Bronze Member
    Messages: 1,527

    From the info I read the Parker 280 wheel motors on the Hyper drive turn 266 RPM where the old White unit turned 250 that is why the new mower goes faster. If a mower loses speed part of it could be worn tread on the tires making the wheel no go as far when it turns a RPM but that is only a slight difference. More than likely the pumps are down on pressure not allowing the wheel motors to spin up all the way? I have not researched it so I cannot say.

    I am glad to hear this report because when I tried a new Super for me I realized my XR7 unit could do the same and probably more as the new mower if I updated it.

    From what I can tell a Generac uses the same whole pattern as the SB Kohler makes more power than a BB Kaw or Vangaurd and they are testing fuel injection from what I am told + they are made in America.

    The drive is easily updated on the old mower as well and it is like 150 pounds to 200 pounds lighter and lower so for steep mowing it should work better.

    Yes the new mower is better but for me not really.

    You like speed you should try the 26's on the rear, that would be one awesome Z.
  9. GMLC

    GMLC LawnSite Platinum Member
    Messages: 4,345

    Smaller tires would give you a higher top speed. Larger tires would be slower but give you more power. Think of your dirt bike or mountain bike, bigger rear sprocket=easier up hills, smaller back sprocket=higher speed.
  10. Ridin' Green

    Ridin' Green LawnSite Fanatic
    Male, from Michigan
    Messages: 17,828


    That would be true if you were changing the gearing in the pumps/motors because it would affect how hard the engine has to work to move the wheels/tires, but just going to larger wheels and tires will bump up the top speed slightly, though it should also take slightly longer to get to top speed. The size difference isn't enough to make that much difference in real world performance in reality.

    A good example of this is with the JD HD garden tractors, the 425 vs the 445. They are virtually identical in all aspects except for rear tire size. Both use the exact same rear end and drive shaft from engine to trans, and run at the same engine RPM's (they also use the same engine with the only difference being the 445 is fuel injected and runs at higher compression to make its 2 extra HP), but the 425 comes with 23X10.50X12 tires, and the 445 comes with 26X12X12 tires. The 445 has a top speed of 8.5 mph while the 425 has a top speed of 7.5.


    The only real and appreciable advantage that puppy would see with the slightly larger tires would be an even better ride.

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