Grashopper 725d diesel or 729 gas

Discussion in 'Tractors' started by Greener Results, Mar 5, 2010.

  1. Greener Results

    Greener Results LawnSite Member
    Messages: 35

    I am looking an a frontmount grasshopper with a 52 inch deck and pos. and extra 60 inch deck, non powerfold, with 15 cub metal hoppers

    I need a mower that can power through tall and short grass, and bag all the time,

    will the gas kubota 29 hrs be enough power or should i run the 25 hrs diesel

    Fuel savings?

    Life Longevity"


    Please help so i dont buy the wrong unit

    also, i am planning on get a fuel tank for my business, and am wondering what fuel discounts tend to be for buying in bulk, this will also determine my choice

    Diesel in Toledo is 2.90 a gal
    gas is 2.40

    do the math! what is the better buy???????
  2. johnnyusa

    johnnyusa LawnSite Senior Member
    Messages: 514

    29 kubota will power right through tall grass.
  3. Greener Results

    Greener Results LawnSite Member
    Messages: 35

    New Decks without chains to link them to the mower What s with these metal bars on exmark and toro mowers, is there any deck sway incase you run into anything accidentally or do the bars just bend?

    I have a 2006 lazer z 27hp kohler with tripple bagger 60 inch triton deck full floating option with chains, ive hit stuff and the chains have saved my ass and machine from serious abuse.

    Any input on these new decks?
  4. lawnlandscape

    lawnlandscape LawnSite Senior Member
    from Midwest
    Messages: 780

    We have a 721D Front Mount. Why would you not get a diesel? Engine should last much longer, with fewer problems.
  5. alanauer

    alanauer LawnSite Member
    Messages: 241

    Greener, the diesel will last twice as long, burn less fuel (off-road diesel at that), and require less maintenance. You could equalize its extra cost by not getting the second deck. It won't be much faster (and no faster in tall stuff) and it's mighty heavy to lift manually.

    The vacuum system also increases the cost but it works as efficiently as any I've seen. I got mine (with the 25' hopper) mainly for leaves, though I'm now mowing more and more with it. Put some car polish on the hopper floor to help the leaves slide out.
  6. ZTR_Diesel

    ZTR_Diesel LawnSite Senior Member
    Messages: 371

    I'm learning now the reasons I dearly wish I had gone for a used 721d instead of the gas engine ZTR I bought instead. Lots of issues (dropped valve at 460 hours, fouling carb & plugs, very sensative to fuel & ethonol content.) Not that the Kubota Gas engine would be near so troublesome---not at all. But the additional torque of the diesel and the fact that since it's designed to run at full load, full speed everyday all day would make me go for the diesel. Plus better resale value. You do NOT need 29 hp on that unit to power through tough grass.

    You need to consider gallons of fuel per hour used.

    The diesel will probalby use considerably less than my 18-hp gas unit.

    The gas 29 hp unit will use considerably more than either unit (and really, you don't need that much power).

    That said...if you need a weed mower, look for a small used tractor and attach a 3-pt mounted Woods mower to it. It's hard to tell by your description it's intended use, but don't fool around using a $12k finishing mower as a brush & weed mower.
  7. lawn king

    lawn king LawnSite Silver Member
    Messages: 2,380

    Well said! I see guys trying to brush hog with $10,000 finish mowers to make a few extra bucks, crazy,crazy!
  8. ZTR_Diesel

    ZTR_Diesel LawnSite Senior Member
    Messages: 371

    If you look on, there are several used diesel 722's with bagging systems already attached for sale, for quite a bit less than a new unit. More than enough power - but I've never worked with a bagger at all. What does: with 15 cub metal hoppers mean? I've never heard of this?
  9. alanauer

    alanauer LawnSite Member
    Messages: 241

    The GH collects in a rear caster-wheel hopper that you can open from the seat. That one holds 15 cu ft; the bigger bagger bugger (sorry, it's been a long day) is 25 cu ft. The smaller fills fast; the bigger gets heavy for a unit that doesn't have the best traction.

    I got the 25 drop-shipped in a factory carton. As simple as it is, the assembly was astonishingly hard. If you buy new, let the dealer put it together.
  10. ZTR_Diesel

    ZTR_Diesel LawnSite Senior Member
    Messages: 371

    Update: I'll soon be able to let you know how diesel Grass-hoppers are overall. I purchased one last week, sold my Yazoo, and will be working with it starting this week. It's an older unit (1993) but seemed solid and I hope still has many more years of life left in it.

    It's 21-hp diesel, has a 61" deck, i would like to find a 52" deck for it.

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