Mercury, 50hp-1980 Head Gasket

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jpriesjr0883

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Head gasket blown. I have worked on many outboards but not this specific make/model. Any insight on the level of difficulty would be much appreciated. My hope is that I can replace the gasket without removing the powerhead from the lower. Words of wisdom are needed:)
 

7920hpMercury

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Re: Mercury, 50hp-1980 Head Gasket

Might could take it off in place, lower bolts will be very difficult to access. And many times will be rusted/frozen in place and easy to break off. So much easier to pull the powerhead off in my opinion. If you pull the powerhead, be sure and unscrew the bolt to the plastic shift piece that rides on the long shift guide that is bolted to the water jacket and block. Good luck.
 

Searay300

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Re: Mercury, 50hp-1980 Head Gasket

I have a 1983 50 hp merc, 4 cylinder. If I am correct, but not sure the head gasket is just the end plate where the spark plugs are? I removed this yesterday because water was running down the back side of the motor. I have been experiancing a lack of power from the motor. It dies out when under load, or pressure, but runs ok for most the time on a hose.
 

Chinewalker

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Re: Mercury, 50hp-1980 Head Gasket

No such thing as a head gasket on your Merc - at least not in the traditional sense. You have a cylinder head water jacket gasket. Its only purpose is to seal water inside the cylinder block passages. It has nothing to do with the cylinders or compression.
 

byrdman4u

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hello all I need help if any one can I have a 1974 500 50 4 cylinder and its leaking water from lower end of unit cover u can see video on youtube 1974 mercury 50 hp can any tell ne how to fix the water leak thanks jim from michigan
 

jimmbo

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hello all I need help if any one can I have a 1974 500 50 4 cylinder and its leaking water from lower end of unit cover u can see video on youtube 1974 mercury 50 hp can any tell ne how to fix the water leak thanks jim from michigan

Try by starting you own new post, this one is 7 yrs old
 

GA_Boater

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hello all I need help if any one can I have a 1974 500 50 4 cylinder and its leaking water from lower end of unit cover u can see video on youtube 1974 mercury 50 hp can any tell ne how to fix the water leak thanks jim from michigan

Change the gasket and start a new thread.

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