1996 Mercury Force 25 HP Service Manual 90-830894 895, Page 36Get this manual
Fuel Tank Maintenance
The inside of the fuel tank should be cleaned once each seasonDirt or water may have entered the fuel tank during refillingClean the tank by flushing with cleanlead-free gasoline or keroseneIf fuel restriction problem is encountered, the fuel filter on end of outlet tube may be obstructedRemove cover and inspect filter for varnish, dirt or depositsClean filter by rinsing in cleanlead-free gasoline or kerosene