Reply To: rings and piston orientation for Firestone 1957 3.6hp Motor

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May 15, 2020 at 9:38 am #203139
seahuntboater
Participant

    Frank can you please do me a favor and double check the ring part number? I may have found a member with a NOS set. Otherwise I am trying to use my bore measurement.
    Bore measurement is 2.11 inches which is more like 2 1/8 and I think you may have said spec is 2 1/16. Maybe it was honed in the past? Threre are locating pins on piston.
    Existing rings are beveled with face width of .12 inches and radial wall of .09

    Model info again is.
    Firestone 3.6hp Code is 133-7-1075 stock number 10-A-111 serial 10751146.

    I don’t want to buy rings only to find they are wrong.

    If you have any other advice on buying rings based on dimensions let me know please.