Equipment question

Discussion in 'Lawn Mowing' started by grassleg, Jul 17, 2008.


Engage PTO at:

Poll closed Aug 16, 2008.
  1. Full throttle?

  2. Lowest w/o bogging engine?

  3. Half throttle?

  1. grassleg

    grassleg LawnSite Member
    Messages: 32

    so, in some other threads this seems to be a serious debate..and i think we could ALL benefit if we got the solid truth, rock bottom solid...that may not exist..:dizzy:

    At what speed do you engage and disengage blades? full throttle, or low idle.
    I always engage/disengage at half throttle.

    Anybody got one solid answer?
    Techs out there?
    we run strictly exmark.
  2. delphied

    delphied LawnSite Silver Member
    Messages: 2,067

    Ever read the manual?
  3. gorknoids

    gorknoids LawnSite Senior Member
    Messages: 316

    I always do it at full because the effect on the hydraulic system and the engine, on a percentage basis, is at its lowest. If it takes "X" amount of force to engage the PTO, the higher the percentage you exceed "X" by, the less of an effect it will have on the components providing that force.
  4. grassleg

    grassleg LawnSite Member
    Messages: 32

    *eyebrow raised*

    i guess you cant just think about it from the aspect of the PTO clutch but the overall systems within the mower..
    which is why i engage at half.
  5. tamadrummer

    tamadrummer LawnSite Bronze Member
    Messages: 1,102

    Half just as the owners manual says to do. I don't tend to over-think what is clearly stated in the manual.
  6. jkason

    jkason LawnSite Senior Member
    Messages: 546

    Does anyone EVER read the manual?

    Electric clutches - half throttle (or replace when they wear out sooner).
    Manual engagement - doesn't really matter.
    When you're cutting, though, run at full throttle, please.
  7. dakota2112

    dakota2112 LawnSite Member
    Messages: 55

    I'm no expert on this but think about the clutch in a car or truck. If you routinely engage the clutch with the engine turning maximum RPM, you'd wear out the clutch in short order. The same concept applies to the PTO clutch. Lower engine RPM means you get less slippage. Of course too low of RPM might start to get hard on the engine, so half throttle is a good happy medium. I'd go with half throttle (especially if that's what the manual says, and I think that's what my Scag manual indicates).
  8. brandtb1

    brandtb1 LawnSite Member
    Messages: 153

    On my walk behind, I have been told to engage at half to save the wear and tear on the belts. I do cut at full throttle.
  9. mississippiturf

    mississippiturf LawnSite Senior Member
    Messages: 674

    My Exmark manual, as well as the dealer I purchased it from says "half-throttle", so thats what I do.

    On another note, I am attending a family reunion later this month in Nebraska. It will be near Beatrice, so I e-mailed Exmark folks to see if I might could get a tour of their manufacturing facility. The marketing guy has extended an invitation, so I'll report my findings after the tour!!
  10. slawn

    slawn LawnSite Senior Member
    Messages: 326

    Sorry, not trying to hijack the thread. Mississippiturf I'm not far from you, I'll like to PM you if you you don't mind. Your PM must be turned off.

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