1988-1992 Mercury Force 5HP Outboards Service Manual, Page 24Get this manual
HINSPECTING FUEL CAP AND GAUGE ASSEMBLY 1234567Inspect cap gasket (A) for signs of cracking and replace, if necessaryIf parts other than the cap gasket are damaged, replace the complete capRemove galJge assembly (8) from fuel tankInspect gauge gasket (C) for signs of cracking and replace, if necessaryInspect float (D) for damage and make sure it is not oil soakedInspect pick-up tube (with screen) (E) for damageIf parts other than the gauge gasket (C) are damaged, replace the complete gauge assembly