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  1. R

    Looking for a prop recommendation

    I have a 1981 50 hp Mercury (4 cyl) on a 15.5' fiberglass runabout. When lightly loaded (1 or 2 people) the motor seems well matched to the boat. It planes at about 3800 RPM and, at WOT, it revs at 5300 RPM (24.0 knots). I normally cruise at about 4200 - 4400 RPM (17 - 18 knots). Mercury...
  2. R

    Advice requested - small kicker motor

    I am looking for a kicker motor for my 15.5' fiberglass runabout. The main motor is a 50 hp Mercury (2 stroke 4 cylinder). I want the kicker for fishing and as a get home motor in case the 50 hp fails. <br /><br />I don't know the weight of the boat but it runs pretty well with the 50 hp...
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    Tach Problems - its going backwards

    I am having a problem with the tach on my recently acquired used boat. It reads backwards. When I start the motor the tach reads just below 0 RPM and when I increase throttle it decreases with the change in speed of the motor When I let off the throttle it moves back to 0 RPM. It's working in...
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    50 hp Mercury - what year is it?

    I just purchased a boat and outboard motor. The motor is a 50 hp Mercury (blue background on the lettering). It is a 4 cylinder. The S/N is 7154345.<br /><br />Can someone please help by telling me the model year of the motor?<br /><br />Thanks in advance.
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