Dual Function Reservoir Exploded
F1UZ-9B263-B $90-200 plus sh
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Thoroughly clean & inspect each part. Replace any that are worn or damaged. Apply a light film of clean motor oil to each part before assembly. Do NOT use silicone grease on any fuel system component. The only acceptable lubricant is clean motor oil.
If the valves' upper &/or lower O-rings split, crack, or leak, fuel can be transferred from one tank to another, possibly resulting in overflow & fire.