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    1986 Mercruiser 170hp 470 3.7 over heating problem

    Hey all 470 members need help. Ive done every test and changed everything i could change to fix this issue. Head a compression test done on the coolant system. Only leak found was a small one on the front of the heat exchanger. Head gasket good, Exhaust and coolant seperation gasket new, All new...
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    Mercruiser thermostat 3.7 170hp 470

    Hey 470 members, I have a new thermostat to put in. Can anyone tell me what way it goes in thanks
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    Mercruiser 3.7 170hp overheating problem

    I have a Mercruiser 3.7l 170hp 4-cyl, with an overheating problem. I have changed the impeller, the raw water hose from the outdrive and inside on the block, the heat exchanger was not getting raw water, but I pulled the hose off of the copper inlet and raw water was coming through, so that...
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    Mercuriser 170 hp 3.7 liter exhaust boots

    I have a mercruiser 3.7 liter 170hp 4 cylinder. On the inside of the motor on the exhaust theres rubber that connects the pipes. it goes from a four to a three inch. not sure the exact diameter.What cause those to burn or go bad. mines got a hole in it and looks burnt on the inside. this is what...
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    1987 searay Deville II mercuriser 170hp 3.7 trim switch problems

    On my shifter i have the option for bow down or up. The bow down works. But the bow up does not. But the trailer switch up does. any ideas on what will cause this
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    mercury cruiser 170hp 3.7 voltage regulator

    On my mercury 170hp it doesnt have a altenator it has from what iam told a voltage regulator. And from my understanding the voltage regulator read from the fly wheel, how do you test the voltage regulator to see if it is produce enough voltage. and how much voltage should it be produce
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    mercury cruiser 170 hp temp

    I have a 1987 mercury cruiser 170 hp I/O what is the normail operating temp and rpms for this motor. Also if i dont run the blower motor it doesnt get over 175 in temp but it will just crank until the motor cooles down. Any ideas.
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    1987 mercuruiser carburetor

    Have a question. I have a 1987 mercury cruiser 170 hp 4 cylinder 3.7. When the boat sits for awhile i can crank it and it will run for a bit. then after i prim it will start and stall out like it flooded. i look in the carb and its got fuel siting in the barrel. then in netrual it still leaks...
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    1987 merc cruiser 170hp 4 cylinder coolant leak

    Hi everyone. My name is jason new to the merc 170 hp motors. The problem iam having is. When i fill up my coolant resivor my coolant drips out my outdrive as soon as i poor it in. Now if i run the motor it blows it out. I know the impeller is bad on the lower unit. Does that affect he coolant...
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