1988-1992 Mercury Force 5HP Outboards Service Manual, Page 25Get this manual
IREPLACING PRIMER BULB 1Place the primer bulb (A) in hot water (180 to 200 degrees F) until hose (8) becomes soft and pliablePull hose and ferrule (C) from each end of bulbInspect ferrules and replace if necessaryReheat and push hose and ferrule onto each end of primer'bulb
NOTE: Make sure the primer bulb is installed with the end marked TANK oriented toward the tank5Flush hose with clean fuel before connecting it to the motor