Full Throttle?

Discussion in 'Lawn Mowing' started by Scraper, Jul 17, 2002.

  1. Scraper

    Scraper LawnSite Bronze Member
    Posts: 1,656

    I know this has been discussed in the past, but I wanted to see if there were any new views. I was speaking with my dealer (the owner of the shop) the other day and mentioned that I engage my blades at half throttle due to not wanting to wear the electric clutch. He told me that you are supposed to engage at full throttle. He said it's the opposite of what you'd expect, but said that's what you're supposed to do. I trust this guy as he is no spring chicken and has been in the business his entire life as it was his fathers shop prior. I thought we had agreed half throttle was better in past threads which I'm just too darn lazy to find. :confused: I could be wrong.

    Thoughts?
     
  2. smburgess

    smburgess LawnSite Senior Member
    Posts: 469

    He just wants to sell you clutches.

    Always engage your blades at the lowest RPM to can.
     
  3. KLMlawn

    KLMlawn LawnSite Senior Member
    Posts: 443

    I have 2 Wright Standers, both with elec. clutches, purchased from two different dealers ... both have told me to engage the blades at half throttle, NOT full.
    Even though you may or may not wear out the clutch, you will still stretch the belts.
     
  4. Bunton Guy

    Bunton Guy LawnSite Bronze Member
    Posts: 1,746

    Believe what you want. Don't listen to others and make your own decision. My best friend owns a small engine repair shop and I had asked him this question he would never lie to me to make money off of me and he said in his own opinion that its best to start blades at full throttle if it was such a big deal if would be in your MANUAL !!!!!! Just like they tell you checking your oil is a important thing well if it was all that inportant to engage blades at half throttle it would be in bold.
     
  5. Potomac Lawns Inc.

    Potomac Lawns Inc. LawnSite Senior Member
    Posts: 409

    Well my JD f620 mower manuel says to "MOVE THROTTLE LEVER TO THE 1/2 TO 3/4 FAST POSITION.
    PULL PTO KNOB UP
    MOVE THROTTLE FORWARD TO THE FAST POSITION FOR MOWING.

    :blob3:
     
  6. dr grass

    dr grass Banned
    Posts: 242

    wow! i never thought about that. i seem to go through clutches more often than i should. i always ingage the pto at full throttle. between that, and all the posts saying to ingage at half throttle, i guess you got me convinced. im a half throttle ingager now ... lol. thanks for the info.

    Shep :blob4:
     
  7. Cut This!

    Cut This! LawnSite Member
    Posts: 48

    Engaging the blades at full engine RPM is better for the engine but will wear the clutch faster.

    Engaging them at minimum RPM is better for the clutch but more harmful to the engine.

    Most manufactures cycle test their machines at full throttle but also don't usually test with doulble blades.

    So the choice is yours......

    maybe 3/4 is the best?
     
  8. bob

    bob LawnSite Platinum Member
    from DE
    Posts: 4,254

    Also , disengage after you thottle down. This also helps the clutch.
     
  9. scagman

    scagman LawnSite Senior Member
    Posts: 270

    I have a 2002 Scag swz 48" Hydro, manual states " When PTO is engaged or (possibly) disengaged, a squeling sound from the underside of the machine is normal. It is caused by the electric clutch plates meshing as the mower comes up to speed. For best equipment life, engage the clutch with the engine at 3/4 throttle, not under full load.
     
  10. Albemarle Lawn

    Albemarle Lawn LawnSite Bronze Member
    Posts: 1,544

    Barry (eng mower guy) is a Gravely engineer that posts here and that is his recommendation.

    I SCREAM at my employees and send them home if I hear a clutch engaged at full speed.

    Think about how hard you are being on the blets and clutch when you dump at 3600 RPM.

    Would you sidestep your truck's clutch at 3600 RPM? Maybe if you are 16 and your dad bought it for you.

    I have thousands of hours on machines with the Warner Electric clutch and have never had to replace one, or an engine.

    Ken
     

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