1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 106Get this manual
Upper Housing and Fuel Level Indicator65 and 100 The fuel level indicator is mounted to the upper housing and fuel line assemblyThe entire assembly may be removed by removing the four attaching screws Lift the assembly from the tank carefully to avoid damaging the indicator float or the screen at the end of the fuel lineCheck for free movement of the indicator on the indicator pinRemove the pin from the indicator support by compressing the free end and pulling it outInspect the indicator to make sure that the floaO arm CD is not bent and that the float is not damaged or oil-soakedRemove the two screws CD attaching the indicator support to the upper housingLift the indicator lens out of the upper housing, and clean it with solvent or lacquer thinner to remove any foreign matter which may be clouding the lensInspect the lens seal for cracks or shrinkage which may allow leakageWhen reassembling support to housing, tighten screws to torque of 1,6-2,2 Nm (15-20 inIbsThe release valves must seat tightly to prevent gasoline or fumes from leaking out, but must open clear passage for air to enter the tank and for fuel to be drawn out when the fuel hose is connectedDirt may keep the release valves from seating properly The release valves are best cleaned by removing the core plugs and disassemblingReplace valve seats (O-rings) to assure tight sealInstall small ends of springs on valvesand secure the assembly in the housing using new core plugs staked in placeThe air inlet disc valve must seat tightly to prevent fumes from escaping the tank when the fuel hose is connected, but must allow air to enter the tank The disc valve spring retainer is staked to the upper housing and may be removed by filing off the burrs if replacement is necessary Restake with small punchReassemble upper housing to fuel tankTighten screws to torque of 2,8-4,0 Nm (25-35 inIbs LN