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#161971
JACQUES
Participant

    aside from saving casting material the cavity likely serves no purpose so filling it with jbWeld after a good wire brush job and carb cleaner should not cause any problems .

    I would not apply anything on the outer side edge of the main cavity in case a loose piece of JB weld end’s up the water tube or engine 5 miles from shore .

    wait for secondary opinions ….

    Joining AOMCI has priviledges 🙂