Quote:
. . I understand that all residual from the gas must be removed and perhaps it is a problem that cannot be fixed.
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Unlike most other boat builders, SeaCraft NEVER foamed in the tank, at least in the Moesly and Potter era. Foaming in tanks is a BAD idea because the foam holds moisture against the tank and causes corrosion. It cost more because they had to ventilate the bilge, but there is no foam to get contaminated, which is what I assume you meant by "residual". The center section between the stringers where the gas tank lives is wide open. On my boat I can look forward from underneath the stbd stern seat/hatch and see the back of the gas tank.
1988 is probably a Tracker-built model and I'm not sure if their tanks are foamed in. If there are vents built into the hull or gunnels, tank is probably not foamed in.