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  1. M

    1983 70hp top cyl has fire not running

    "Rebuilt carbs top cylinder no "Rebuilt carbs top cylinder not running, will run on the bottom two cylinders just will not idle. Any Ideas?"
  2. M

    Merc 70 starting and Idle problems

    "1983 70, Runs fine at speed, "1983 70, Runs fine at speed, but when I shut it off it is hard to restart. I have to push the throttle up and let it rev up for a second. Also it runs much better at low speeds trimmed up, when trimmed down this problem is at it's worst? Thanks Tim"
  3. M

    Fuel Pump 83 70hp merc

    "Problem with fuel pump. Have "Problem with fuel pump. Have rebuilt pump repalced all fuel lines, rebuilt carbs (made a big differance in performace) But still suffering fuel starvation at high speed. Can pump bulb and it will pick back up. Also hard to get started cold until I can get the...
  4. M

    Fuel Pump rebuild 83 70hp merc

    Got my rebuild kit and everyth Got my rebuild kit and everything fit fine but came with 3 O-rings? Could not find any inside the pump. Any tips on where they should go? They are big enough to fit around a small finger. 1983 3cyl 70hp. Serial #6382587
  5. M

    1983 70hp Fuel flow problem

    "Hello all I am new to this bo "Hello all I am new to this board. I have a 1983 70hp merc. The motor runs good but has had a problem loosing its "prime". When running at 75% power I have to pump the bulb or it looses power. Today a new problem happend, to keep the motor from bogging out under...
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