1984 Johnson Evinrude 2 thru V-6 Service Repair Manual P/N 394607, Page 135Get this manual
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Fuel Tank2 1'" Inspect the filler cap and gasket for wear, damage, or leakage; replace if necessary2 Remove shut-off valveRemove gum and varnish deposits by washing in OMC Engine Cleaner (OMC Engine T