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  1. S

    No Fuel on #2 Cylinder on 1988 75 horse Mariner 3 cylinder

    After a carb rebuild, my motor isn't running right. It runs rough and wont idle. I had it running and pulled the spark plug wire on the #2 cylinder with no change at all in the performance, letting me know that its not getting any fuel. I tested the spark and compression and they are both...
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    2 oily plugs, but one shiny clean

    I have my 75 horse Mariner in for service but before I took it in I was running it in the driveway. It wont idle without shutting off or run at full power. I have spark on all 3 wires, just had the carbs rebuilt, new fuel pump and new fuel line. Compression checked out fine on all three...
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    What is the purpose of the poppet valve?

    My 75 horse Mariner shoots out water where the poppet valve is. The diafragm is torn so I put a screw in the hole to stop the water. What does the poppet valve do any way?
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    Bad Stator 75 horse Mariner

    What are the symtoms of a bad stator. Had carbs rebuilt, fuel pump replaced, new plugs, fresh gas and all new fuel lines but the motor won't idle and of get to full power at wot. It is a 1988 3 cylinder. Also did a compression test and all 3 check out ok and have spark on all 3 plugs. Any...
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    Missing O-Ring on fuel line connector

    When replacing my fuel line on my 75 horse Mariner, I noticed that there was no o ring on the connector to the motor. Would this explain why my motor is running too rich. It is oil injected so my theory is that it isnt pulling enough gas to mix the oil correctly. Is this correct?
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    Trim pump having issues on 75 horse Mariner

    My trim pump motor is starting to work intermittently. Works great when it runs but it will just stop working altogether. When it stops working a tap with a screwdriver on the pump makes it start working again. what is happening here?
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    Could I have a bad fuel line on 75 horse Mariner?

    Just had my carbs rebuilt and fuel pump put on by my mechanic but the boat is still surging and hesitating and not idling properly. He went through the motor and said that my spark and compression were good but he did say I might want to think about changing my fuel line with a new bulb and...
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    Spark advance arm adjustment 75 horse Mariner

    Got my boat back from some carb service and the mechanic adjusted my timing. Now I have lost some of my top end, about 500 rpms worth. I also notice that it vibrates intermittently at wot. It just doesn't have the umph it used to. All the adjustments he made in a tank but he never put it on...
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    First link n sync on 75 horse Mariner

    I am going to be doing a link-n-sync on my 1988 3 cylinder 75 horse Mariner. I will have Solec manual. Can I do it with muffs or do I need to be on the water. What other tools will I need. Any other advice would be helpful
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    Lost some performance after repair please help!!!

    I had my 1988 75 horse Mariner carbs cleaned and floats adjusted. I also had the fuel pump parts replaced. Before I had the work done It would run at 5100 rpm at wot. Now it tops out at 4600. He adjusted the timing and throttle lever and idle screws. It also surges and drops at wot. He...
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    Power trim losing pressure on 75 horse Mariner

    My 75 horse Mariner slowly loses pressure when trimmed up. A mechanic told me it was probably a valve that went bad and didnt think that it was a big deal to fix. When I looked at a schematic of the trim assembly it showed a screw on the side with some little o-rings near the tip. The whole...
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    Need help choosing a prop

    I have a 75 horse Mariner on a 17 foot aluminum Tracker V bottom. The prop on it is a 17 pitch vented stainless. I run about 35 mph at 5600 rpms. According to the specs the recommended rpms should be 4800-5250. I am thinking of going to a 21 pitch prop that would bring my rpms down to the...
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    Rev Limiter

    Does anybody out there know if a 1988 75 horse 3 cylinder has a rev limiter on it?
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    Prop replacement on 75 horse Mariner

    My Tracker currently runs at 35 mph at 5500 rpms. According to the service manual my recomended wot rpms should be 4800-5250 rpms. The current prop is a stainless 17" prop. Should I move up to a 19 or 21 inch prop to bring my rpms down. I know that in doing so I would lose some hole shot but...
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    Can I change my 75 horsepower Mariner to 90 horsepower?

    I have a 1988 75 horse 3 cylinder motor. I know that some of the parts are interchangeable but is it possible to increase my motor to 90 horsepower? Would it be easier to just try to trade up and buy a 90 horse?
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    Motor rocks back and forth at idle

    My 1988 75 horse Mariner 3 cyl rocks a little bit back and forth at idle. It starts great idles good and revs up no problem. Is this normal or an indication of something I need to address? If so what can I do to make it stop?
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    Fishfinder loses bottom at higher speeds

    I just bought a new Humminbird 798 fishfinder that loses the display as get on plane on my aluminum Tracker that has 2 rows of rivets that span the the width of the boat on the very back edge. I mounted it far away from the prop and about an inch below the bottom of the boat. If I mounted a...
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    rev limiter question

    Does anybody out there know if my 1988 75 horse Mariner have a rev limiter on it?
  19. S

    Looking for the gear ratio on a 75 horse Mariner

    Can anyone out there tell me the gear ratio on my 1988 75 horse Mariner 3 cylinder?
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    Can a dead battery affect performance?

    My friend has a 1983 Mariner 90 horse. After he replaced the stator and 2 power packs we took it out for a test run. His cranking battery was dead so we jumped it from his trolling motor battery. The motor ran great for a while then started bogging down when in gear. His rectifier is bad and...
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