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A Mercury outboard water pump is a engine cooling system. A outboard water pump is what blows steam through to get the car cool,
By simply storing your outboard in a vertical position, powerhead up, the cooling water will drain out of the engine via the gearcase.
1978 80 Mercury Outboard IDLE ADJUSTMENT
For a 2005, Mercury 3.3 hp outboard, a NGK BPR6HS.
To determine the age of a Mercury outboard, you will need to know the engine serial number, and the horsepower rating.
The value of a 50 hp Mercury, or any other outboard, is largely dependant on the age of the engine.
It's always important to flush your motor with fresh water after operating in salt water. The salt deposits from the salt water used to cool the engine eventually builds up in the cooling system and could clog or restrict the flow of cooling water causing the engine to overheat.
A 9.8 hp Mercury outboard, serial number 4020915, would be a 1974 year model.
To find the year model of a Mercury outboard, both the serial number, and the horsepower of the engine, are needed.
You have to check with the serial number that is on the engine.
For the Mercury 9.9 Two Stroke Engine it is 50:1...
jacket cooling system is a that the part of the engine were