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    77 Merc 4.5 parts questions

    I have been having trouble getting my motor started. It takes a lot of pulling for me to get it running(6-20+ pulls). Last season I went through the carb & replaced the cracked gas lines, reset the float bowl & replaced the impeller. Once I get it running it runs fine, but at really low...
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    how much will an impeller pump??

    I have had a problem with my 77 Merc 4.5 as it quit pumping water. I just recently replaced the impeller and when I put it back together it still wasn't working. After submitting a post I was given some other advice for things to look for. I pulled the engine off the top of the entire leg and...
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    1977 Merc(4.5) Cooling water questions

    I put in a new impeller yesterday and althoug I had a few frustrating minutes I thought it went well. It all went back together and the gears worked the same as they did before. But when I started the motor up, I am not getting any water out of the pee hole. And I get lots of bubbles going...
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    HELP, Old merc 4.5 questions

    I am new to working on boat motors, although I have owned one and fished for the past 20+ years. <br /><br />I recently took the carb apart to get at a gas line that was leaking(At the time the boats was running). I cleaned out the carb(jet, needles), and put it back together. Now the motor...
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    Carb adjustments for mid 70's 4.5 Merc

    I just took apart and cleaned the carb on my old Mercutry 4.5 horse. Before doing this,the gas line feeding the carb was rotten and was leaking. But even with the line leaking although motor wouldn't idle well, it alwasy ran good once the rpm's increased. I got a new gas line, and cleaned...
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    Help - removing carb on mid 70's 4.5 HP

    I have a mid 70's 4.5 HP mercury outboard for a small fishing boat. It doesn't idle well. I would like to attempt to clean the carb myself, but I am having trouble removing it. I pulled apart what I think is the float bowl right beside the carb, and was able to get the nuts off off the carb...
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