rmmustangs
New member
"I have a 1993 Merc 40 hp 4 cy
"I have a 1993 Merc 40 hp 4 cylinder that I would like to replace the water pump and thermostat (if it has one), how difficult is it and do I need a repair manual? Also theres times when the engine is not producing full power, any ideas?
Any help would be appreciated."
"I have a 1993 Merc 40 hp 4 cylinder that I would like to replace the water pump and thermostat (if it has one), how difficult is it and do I need a repair manual? Also theres times when the engine is not producing full power, any ideas?
Any help would be appreciated."

