Reply To: 1954 big twin

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October 11, 2019 at 11:53 am #185021
Bob Wight
Participant

    US Member

    85 is a little low but it should run. I’d run it with some fresh gas and oil and some Engine Tuner or other decarbon product and see if that might loosen up some sticking rings and let the compression come up some. You may also have a bad head gasket.

    Bob

    1937 Champion D2C Deluxe Lite Twin
    1954 Johnson CD-11
    1955 Johnson QD-16
    1957 Evinrude Fastwin 18
    1957 Evinrude 3022
    1958 Johnson QD-19
    1958 Johnson FD-12
    1959 Johnson QD-20
    1982 Evinrude 25hp

    “Every 20 minute job is only a broken bolt away from a 3-day project.”
    "Every time you remove a broken or seized bolt an angel gets his wings."