87 Mariner 60 low water pressure

bobbuffalo43

Cadet
Joined
Jun 7, 2003
Messages
11
At full rpm, water pressure is only 1-2 pounds on gauge. Water at P-hole seems forceful, and gauge and hose have been tested (reads 3-4 lbs. when I blow in the outboard hose end). The gauge fitting on the head is clear. The engine runs fine and does not seem to overheat. Water pump has been replaced (many times). Previous owner says this condition has existed for years with no ill efrfects. Could there be something missing somewhere?
 

ricksrster

Commander
Joined
Jun 19, 2005
Messages
2,022
Re: 87 Mariner 60 low water pressure

Is yor tell tale a strong stream? A Meercury spec I read said that you what at least 5 PSI at WOT in all manuevers.
 
Top