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Are aftermarket spark plugs beneficial?

Discussion in 'Mechanic and Repair' started by lzrj, Oct 31, 2006.

  1. lzrj

    lzrj LawnSite Member
    Messages: 245

    Do you replace the factory spark plugs with aftermarket ones when you buy a mower. Haven't looked at what type of plugs my kawi 25hp came with but was wondering if any specialty plus like platinum plugs or any other type would have any benefits to install.
  2. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Messages: 3,526

    My 20 hp Kohler came with platnum plugs and I change them each year just to be on the safe side, its cheap insurance. I avg around 300-350 hours a year on the mower and each year the plugs I take out look about as good as the new ones I install. Ive been tempted to try a regular plug.

  3. noseha

    noseha LawnSite Senior Member
    from MI
    Messages: 554

    on my mower, on my stihls. I use bosch CrNi ws6f-7547 ordered right from stihl. I don't get 1/3 of the life out of champion or ngk. imo
  4. lucforce

    lucforce LawnSite Member
    Messages: 223

    All spark plugs are "aftermarket."
  5. steve45

    steve45 LawnSite Bronze Member
    Messages: 1,325

    Precious metal plugs are normally used to give longer life in applications where the electrodes wear away, or in very hot running engines. This is normally not the case in small engines. Fouling is more common in these applications. I think precious metal plugs would be a waste of money.
  6. lucforce

    lucforce LawnSite Member
    Messages: 223


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