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  1. M

    question about flywheel swap

    Hey everyone, i need a new flywheel for my 85 blackmax 200hp and i was wondering if i can use an 83 flywheel or is the timing diffrent? thanks matt.
  2. M

    Throttle arm adjustment?

    hey everyone. I have a quick question about the throttle arm on my mercury black max 200hp. I was just wondering what the three adjustment screws eack do. 1- the top one seems to adjust a lever that is under the flywheel. 2- the second one im not sure what it does but its in the middle part of...
  3. M

    add to gas injector carb cleaner?

    Hey everyone! Heres the deal my 1985 mercury black max 200 hp wouldnt idle with out shutting off so i played with the idle screw and now it will idle at about 900 rpms and not shut off. (today i backed it back down to where it was and its ok ) I seem to be having several issues with this motor...
  4. M

    over charging battery?

    Hey guys I have a mercury black max 200 hp and its been twice now when im driving around i notice the bettery is charged to 18 volts on the v- gauge it varies alot it will come back down to 13 volts most of the time but i dont understand why its charging the battery to 18v im assuming this could...
  5. M

    Question about LU break in procedur

    hey everyone! I just installed my new lower unit on my merc black max 200hp and i had a question on the breakin tag they say to start at low rpms and slowly increase untill you hit 3500 rpms at the 5 hour mark. Does this mean thats i have to idle around for about two three hours, Also wondering...
  6. M

    Video- blackmax 200 hp overheat

    Heres the motor im having trouble with. Seems to run perfect at idle but the motor heats up to 240 on the outside of the block i checked with a gun to confirm the gauge and im actually dissapointed it isnt lying to me! just buy the idle sound can anyone tell me if its running rough or is it...
  7. M

    temp gauge

    Hey does the temp guage usually connect to the inside or the outside ouf the block on a merc black max 200?? when i plug it up to the outside i get a reading on my gauge with the key on when i plug it to the inside of the block i get a reading with the key off
  8. M

    Motor Runs New t-stats but still over heating?

    Hey everybody!! Now that i figured out that my Foot was the Problem i took it off and put back the heads and water cover wth new gaskets for the head and cover and put in some new t-stats. The motor started up great in the drive way with the garden hose plugged up to the main water line and the...
  9. M

    How to get to the crank shaft the easiest way ?

    Hey just got my boat back in the drive way and took the heads of my pistons. They are fully lubed up and no rust + no scoring in the block and i have 120psi on all. I can turn the fly wheel and everything moves good untill i block at somepoint but i can force it through. I was wondering what...
  10. M

    blackmax 150 siezed up what to do ?

    Bought a winner bass boat with an 85 black max on it. Put a ton of effort in making this boat nice and clean for summer. I was super excited to try it out on sunday, put it in the water and went for a test run. Everything seemed fine the water pump seemed to be working because it was pissing...
  11. M

    Merc black max Siezed pistons?

    Hey everyone. Today i put my boat in the water Mercury black max150 and went out for a test run in the morning. Everything went ok exept i thought it was over heating a bit around 240 F. The spout where the water comes out seemed ok. So i dicided to go for another ride at 5 and i got out of the...
  12. M

    Merc Black max 150 Lower unit steering "colom" loose

    hey everyone first of all i dont know what you call the part of the motor but its where the pitman arm connects to the motor for steering if i pick up the foot i can move about 1/16 in all directions at the bottom and im kind of worried about long term do you think that its very bad for the area...
  13. M

    mercury propeller

    hey i have a 5 blade propeller stainless for a merc black max 150 im asking 500 on kijiji am i over priced or fair never been used
  14. M

    Mercury blackmax 150

    Hey everyone. i have a question about my lower gear unit. when i put the boat in gear(fullthrottle) i can spin the prop in both directions cw no sound ccw ratcheting sound. Are my gears stripped or is this normal. I was told that the prop should lock when turned ccw and the opposite when in...
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