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  1. 8

    intermittently won't get up on plane

    Hello, I have an 18 foot bass boat with an 86' mercury xr2 150 2 stroke. More often than not, it will not take off and get up on plane. Sometimes when I increase throttle to take off it will die. Sometimes it will push water but not break over on top. It will usually idle, but rough and...
  2. 8

    fuel line and primer bulb size

    I have a 1986 Mercury Black max xr2 150. I am needing to know what size of fuel line and primer bulb to use from tank to motor? I have seen 3/8 and 5/16 sizes but I have also seen 1/4 inch. I want to know what is OEM for that motor, not sure what is on it now.
  3. 8

    needing diagrams for repairs on 86' merc. 150 xr2.

    I was wondering if anyone could send me diagrams for replacing the trigger on a1986 Mercury black max xr2 150hp with torque specs too. I was also needing a tilt/trim diagram so I can replace my o-rings, my local library had one but the book has vanished and I never got a photocopy. The trim...
  4. 8

    No spark in #3 and #6 cylinders

    I have a 1986 Mercury Black Max XR2 150hp. It has been running rough and coughing and sputtering. I had trouble getting rpm's up to get on plane, so I checked the spark and cylinders #3 and #6 don't have spark. While I was on the water it would surge, kick up and then fall off again. What...
  5. 8

    need help with 1986 tilt cylinder rebuild

    I am needing to find a schematic for replacing the o rings in my tilt/trim cylinder. It leaks off while sitting still or cruising down the lake. It has been doing it for a few years now and it needs fixed. I have replaced the fill cap and made sure the fluid is full. It does not have any...
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