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  1. J

    Carburetor swap, WMA9 for a WMA7

    I'm wondering if I can swap a WMA9 for a WMA7 carburetor? I have a 1994, 40 HP Mercury outboard with four cylinders and two original WMA9 carbs, but the lower one is bad, so I'd be mixing the two with the original 9 still on top and would be installing a 7 on the bottom. They appear...
  2. J

    1994 Mercury 40 HP, 8.70 V at dash, 12 V. at motor

    Started boat (Suntracker Pontoon) to the sound of beeping about one second apart. Like a reverse warning horn on a truck. Should be an oil warning, oil is full, but that's not my major concern. I should be able to figure that out later by checking the switch. I mentioned it in case it...
  3. J

    1994 Mercury 40 HP Carb. needle and seat

    I have 2 WMA-9 carburators that have both been rebuilt along with new needles several times. The lower carb is dripping from the bottom again, and I believe is a needle/seat problem again, with the primer bulb going soft and the boat stalling occasionally at low speeds. It won't start again...
  4. J

    1994 Mercury 40HP, No reverse

    Prop won't lock out in reverse, but I think will spin in the proper direction in the water. Just no thrust to move off the trailer. Slight chatter sound when you first move the shifter into reverse that I don't remember hearing prior. I think it may have happened while removing it from the...
  5. J

    1994 Mercury 40 HP, 4cyl missing, dying

    First indication. It was running perfect and I was running it wide open and it just died. Started hard and idled poor after that. It misses now, and will only hit 2000 RPM in gear. Background. Engine overhauled 2 seasons ago from burned pistons, so I checked compression first, and it's...
  6. J

    1993 Mercury 40HP, S/N 0G012038 either not charging, or discharging battery

    1993 Mercury 40HP, S/N 0G012038 either not charging, or discharging battery Problem started intermittent (from gauge reading) late last season.<br />I believe I may have a bad rectifier/regulator from checks I made from a Clymer manual, but I am unsure on the stator check.<br />The stator isn't...
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