Search results

  1. A

    Tachometer connection

    Hi, I have 1978 mercury 70hp outboard 3 cyl, I bought a tach and wondering about tach connection on control box, specifically what are the three connections?<br /><br /> +<br /> +<br /> +
  2. A

    MERC 70 HP TROUBLES

    Hi I have a 1978 70hp merc outboard, I've rebuilt carbs, new tanks, fuels lines, primer bulb, de-carbed engine, checked compression, (135psi on all three cylinders) ,new plugs & have spark at all cyclinders, ajusted carbs more times than I can count.<br /><br />My reaccuring problem is it's...
  3. A

    help with prop/misc

    Hi! I have a 16 ft F/G boat with a 1974 merc 70 hp, I currently have a 12" prop, it seems quite sluggish from the start, but gets better once the boat plains out. Should I have a different pitch of prop? I don't know the rpm, as I don't have a gauge. However it doesn't seem to be running at a...
  4. A

    FUEL FILTER 70 HP MECURY 700

    HI! can anyone tell me if there is fuel filter build on the motor? I don't see an inline filter.<br />thanks
  5. A

    need some advice on 1978 70hp merc 700

    1. I took out my boat today and noticed on one occasion that the tell tale was blowing smoke momentarily then water, is this normal?<br />2. Also what should the fuel mixture be? I was told it should be 50:1 with 2 cycle oil<br />3. Spark plugs and Fuel filter, how often should these be...
  6. A

    What year is my motor?

    Hi! I have a 70hp mercury outboard with serial# 4982255 (canadian made) can anyone tell me what year it is or where to find out. :cool:
Top