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Cooling water is drawn into the water pump through the inlet screen on the gearcase. This water then travels to the powerhead via a copper tube. It then circulates the water passages within the engine block, thereby, cooling the powerhead. At this point, most of the cooling water is expelled out through the exhaust, providing additional cooling to the exhaust housing and tuner. On most outboards a small amount of this cooling water will also exit via the "tell-tale" hose, added for visual pump operation. Many outboards also incorporate a thermostat into the cooling system to regulate powerhead temprature, as well as pressure relief or poppett valves.
What else can I help you with?
What year is your Johnson outboard model no 10R76R?
10R76R is a 1976 model, 9.9 hp Johnson outboard.
What is the ignition point dwell setting for a 1976 25 HP Johnson outboard motor?
20degrees
Is sears 3.5 gamefisher outboard engine air or water cooled?
Most outboard boat motors are water cooled to my knowledge
What is the weight of a 4.5hp Johnson Outboard 1985?
What is the weight of a 4.5hp Johnson Outboard
How old Johnson 4hp outboard motor model bj4brcud?
Johnson 4hp outboard bj4brcud
How do you replace starter 1993 88hp Johnson outboard?
how to replace starter 1993 88hp Johnson outboard
What year is a Johnson outboard model number CD25R?
The Johnson model CD25R, is a 6hp outboard, produced in 1968.
What is the point gap for a 50 hp Johnson outboard?
The point gap for the 50 hp Johnson outboard is set at .020".
What is the weight of a 30hp Johnson Outboard 1985?
The dry weight of a 30hp Johnson outboard, 1985 model is 123 lbs.
What Johnson outboard motor is a J200stlcdr?
A 200 hp Johnson outboard, model number J200STLCDR is a 1986 year model.
What year is a Johnson outboard model number J88MSLCUS serial number R 7486088?
A Johnson outboard, model number J88MSLCUS, is a 1987 model, 90 hp outboard.
What year is a Johnson outboard model JHF 23 A?
Model number JHF 23 A would be a 1968, 3hp Johnson outboard.
