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Can I upgrade a mower engine for more preformance?

Discussion in 'Lawn Mowing' started by Appalachian landscape, Mar 12, 2005.

  1. Appalachian landscape

    Appalachian landscape LawnSite Senior Member
    Messages: 453

    I know it's possible to upgrade any type of vehicle engine, but can you upgrade a mower engine for a couple of extra horses?
  2. CamLand

    CamLand LawnSite Bronze Member
    Messages: 1,299

    what is it you are trying to do, i.e what kind of machine engine on it now?
  3. Appalachian landscape

    Appalachian landscape LawnSite Senior Member
    Messages: 453

    I'm not really trying to do it. I'm just curious. but I have a 15hp kawa twin cylinder
  4. txlawnking

    txlawnking LawnSite Bronze Member
    Messages: 1,905

    O f course it's possible, but it will probly cost you in reliability. On the example of a mower, say you've got a 32" with a 12.5 horse, and it gives up the ghost. Fer shure I'd upgrade it with a 15 hp when I swap engines. Within reason, swapping for an engine with more displacement will be the best choice every time.. Just remember, ( when "hot rodding" ) the candle that burns twice as brite burns half as long...
  5. Appalachian landscape

    Appalachian landscape LawnSite Senior Member
    Messages: 453

    I just thought it would be neat if there was an upgraded air intake and an exhaust system that would out perform the factory set up. Something simple like you can do to a car or motorcycle.
  6. txlawnking

    txlawnking LawnSite Bronze Member
    Messages: 1,905

    Some engine " families " have different hp rating for the same displacement, ( Kohler Command for example ), But I think the difference could be attributed to changes like cam, C. R. , especially carb size and calibration, etc..
  7. Critical Care

    Critical Care LawnSite Bronze Member
    Messages: 1,654

    It's not always that easy. I couldn't figure out how to install the high lift cam on the mower and so I went to installing a B&M 420 MegaBlower but that wasn't good enough, so then came the nitrous...

    Had to go out and purchase a new pair of pants after that.
  8. traman

    traman LawnSite Senior Member
    Messages: 712

    most hot rod parts are for briggs and stratton engines ,they are used in jr. drag racing nhra
  9. pjslawncare/landscap

    pjslawncare/landscap LawnSite Bronze Member
    Messages: 1,410

    Commercial and industrial engines are built for #1 dependability, #2 efficiency. Boosting the power defeats both mentioned purposes and introduces higher operating temps. Hopping up cars & bikes and such is a common procedure because they fall more into the toy class and not necessarily used to earn $$. Swapping to a bigger motor when the original one wears out makes much more sence. Granted, there may be ways to increase power in a sensable way thru improving intake like fuel injection that will increase efficiency and retain reliability, but it is very costly. A good K & N air filter may be about the only cost effective way to gain a little HP but may be hardly noticable

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