Feed back on propane

Discussion in 'Alternative Fuel Forum' started by gregwl77, Mar 4, 2012.

  1. gregwl77

    gregwl77 LawnSite Member
    Posts: 33

    It's time for some new equipment and I'm thinking about going to propane.... Exmark turf tracer 48" for walkbehind and possibly kubota for zero turn. I'm looking for feed back on propane use, as well as the units above. Thanks for the input!
     
  2. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,076

    Conversions to propane is starting to get hot since the propane is at $2.25
    a gallong and expected to go down in the summer. We have three units converted. The cost to convert is $500 after getting a $1K rebate from state.
     
  3. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    I know there is a slight power loss with propane due to lower BTU, but do you get more hours per gallon?
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  4. djagusch

    djagusch LawnSite Platinum Member
    from MN
    Posts: 4,202

    You in theory use about 20% more propane per hr (basic math behind it). Some in the industry says 7% or nothing.
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  5. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    Combine that with the power loss and it seems like you are going backwards.

    Now increase compression ratio on sai engine and you should be able to squeeze more hp running propane. Than you would need direct injection.
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  6. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,076

    Well I just used 10 gallong in 5.8hrs on a Turf tiger with mulch kit on. It has teh vangard on it 61" So $3.87 per hour. It has plenty of power. Don't know how much gas this unit was always propane.
     
  7. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    That don't seem like much savings considering the aggravation of having to fill up at a propane place.
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  8. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,076

    I go in to the dealer every week anyway and I have 6 tanks so that holds me for a week. We brought out a business who had already converted two so kinda stuck. Today I discovered that my Tiger Cub ran 13 hours on a 10 gallon tank. I was floored.
     
  9. amscontr

    amscontr LawnSite Member
    Posts: 24

    We use a V twin B+S 16 hp propane hydraulic unit to power a huge log splitter and the fuel savings is amazing. A 20 lb BBQ size tanks runs our splitter all winter on 1 tank. Compared to a couple gallons a day @ 4.00 gal gas?
     
  10. BOSS LAWN 2343

    BOSS LAWN 2343 LawnSite Senior Member
    Posts: 407

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