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    Switchbox?

    Took the boat out the other day and it ('82, m50, "classic") wouldn't start (cranked fine). Back home, I checked for spark and had nothing. Noticed that the potting material the area between the terminals in the middle of the switchbox had a "blister" that felt soft and another area that...
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    Prop Advice Needed, Go 4-blade?, Pitch?

    My 1957 Crestliner Voyager 18 with 50hp Merc classic runs at about 27mph and 5500rpm at WOT when lightly loaded. When carrying a typical load, it runs at 5000rpm and just over 20mph at WOT. This calculates to a lot of slip (about 35%) and the boat "feels" like the prop is not hooked up very...
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    Power Loss at WOT - 1982 50hp (4 cyl.)

    My 1982 50hp mercury "M50" (4 cyl.) is running at about 5000rpm @ WOT when pulling a tube or when the boat is loaded. In these conditions, the motor will starve for fuel. (Squeezing the bulb restores power.) Running at lower throttle settings isn't a problem. Prop is a 10" x 13 pitch. The...
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    M50 Fuel Lines/Carbs

    I suspect that my 1982, 50hp 4cyl is going lean at full throttle (it is getting hot, and the power starts surging like there's no fuel). Runs fine at 4k rpm. I rebuilt the carbs, and an expert looked at float settings and set the idle mixture for me. These carbs have diaphragm pumps built...
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    Mercury Overheating?

    I have a 1982 50hp "M50", in-line 4 cylinder. New water pump (impeller and entire pump housing replaced), rebuilt carbs. After I did ignition repairs (new trigger), I took the motor to a local (well-trusted) expert to set the timing and idle mixture. The motor is running great, and peeing...
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    Mercury Tilt-Trim (2 cylinder)

    I'm "new" to old Mercury motors, and have a 50hp in-line 4 from 1982 (an "M50"). Bought this for a boat I'm restoring; It was listed on ebay as a parts motor that was running on two cylinders. A trigger, carb kit and impeller later, it is now up and running. I'm puzzled about the two...
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    Motor/Control Compatibility

    Does anyone have information on what controls are compatible with what motor? I'm interested in an early 80s 50hp Merc (4 cyl) and will also need to get a control. I've seen mercontrol and quicksilver controls on ebay, but don't know what will be compatible. Is there a 50hp 4cyl owner out...
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