Reply To: Heli coil questions/help.

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June 9, 2022 at 10:48 pm #261280
Buccaneer
Participant

    US Member

    Fore whatever reason, our spark plugs have been sized
    metric for a long time. Yours will be the 14 mm and the larger
    plugs some older motors take are 18 mm.
    Seems that was was a recent post about sparkplug heli-coils, the
    good, the bad, and the ugly, so you should be able to search
    on site for info.

     

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