1982 Mercury Black Max 150hp troubles

TRea

Recruit
Joined
Aug 4, 2010
Messages
2
Hello, This motor has set up for a couple of years but was running great when stored. I recently took it out and it started right up. I watched for the water pump to kick in which it did but kinda slow. Ran it for about 5 min when the overheating(i am assuming) alarm at the control started going off. After awhile I started it again this time watching the water pump carefully. Seemed to be pumping fine then the alarm goes off again. Can someone point me in the direction I need to start looking? Thank you very much!!! New member, TRea
 

Dave1027

Lieutenant Junior Grade
Joined
May 25, 2010
Messages
1,081
Re: 1982 Mercury Black Max 150hp troubles

What is the temp gauge reading when the alarm sounds? I'm assuming you have enough oil in it. That might cause the alarm. How hot is the tell tail stream if you put your hand in it? Is the block hot to the touch? You might need to replace the impeller.
 

TRea

Recruit
Joined
Aug 4, 2010
Messages
2
Re: 1982 Mercury Black Max 150hp troubles

thanks dave for the help. you gave me the direction to start looking for the problem.
 
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