Reply To: Removal of scale build up in cylinder water jacket

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August 10, 2020 at 9:35 am #211255
Bob Wight
Participant

    US Member

    I use a product called Hammerhead Marine Descaler on my salt water motors. Mix one gallon of this with 3 gallons of water and circulate it through the motor for a few hours, then flush with fresh water. Works real well and is safe to use on aluminum.

    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."