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  1. J

    what year is my Johnson 70 hp??

    I'd like to find out what year my Johnson is, J70TLCNB, did a search but couldn't find it.. I need the bottom gear case for it & wondering if a 1978 70 hp gear case or leg would fit.?? thanks in advance... John
  2. J

    72 Johnson 65hp, pops when it runs

    started it up, & it kinda pops when it runs, puffs smoke when it does, so I put it in forward & speeded it up ( earmuffs on for water), & it sounded like it wanted to clean up & run smoother, but didn't quite make it.. Would new plugs help? I replaced the plugs last year.. I just replaced the...
  3. J

    72 Johnson 65hp manifold sequence.

    On the 72 Johnson 65 hp 3 cyl motor. There are 3 pieces to the manifold.. The outside plate, A thinner one & a thicker plate.. does the thicker one or thinner one go against the motor??? does anybody have a picture they can post?? thanks..
  4. J

    Head bolt torque for 72 Johnson 65 hp

    Can someone tell me the torque & pattern for torquing the head bolts. thanks, John
  5. J

    72 Johnson 65hp water in bottom two plugs

    I took all 3 spark plugs out of my 72 Johnson 65hp I turn it over with the starter & there is water spraying out of the bottom & middle plug holes.. Is that an inmdication of head gaskets??? it looks like there's another gasket in the same area.. Would one of them be blown??? yet the motor...
  6. J

    72 Johnson 65hp 2 purple wires

    On my motor there are 2 thin purple wires that are not hooked up to anything. they have ends on them for a screw or bolt to go through them. What are they for, & where should they be hooked up? The motor has been working without them being hooked up. but I'm sure they must have a function of...
  7. J

    72 Johnson 65hp Hard to start

    My 65hp Johnson doesn't want to turn over right away. when I try to start it, the motor kinda makes one revolution then stops, acts like a dead battery, then sometimes it almost sounds like it might be out of time.after several tries it fires right up, runs for awhile then starts to slow down &...
  8. J

    Shifter shaft cam 1973 50hp mercury

    I took the leg off my 1973 50hp Mercury. As I was working on it the cam slipped off the splines on the shifter shaft. Are there any pictures how this should be fitted so I can get it on correct?
  9. J

    Replacing bunks

    I will be replacing my bunks & making them longer.My bunks are on the flat. Should I be using treated 2x4's or regular ones?? Fir or Spruce.? what kind of carpet, long shag, indoor /outdoor, or special marine carpet? thanks.
  10. J

    extending bunks??

    I bought a 15' tri hull with a Shoreline trailer that has bunks.. The bunks are about 8" short of the transom, & the bottom roller is about a foot short of the transom. The transom has no support under it the way it is.. tongue weight is about 90 lbs. if I move the boat ahead I would have to...
  11. J

    Tri hull vs modified tri hull

    I just bought a boat that I think is an open bow tri hull.. I now understand that there are also modified tri hulls etc.. How can I tell the difference & what I have, a tri hull or modified... what are the pro & cons of either.. i always thought a tri hull is supposed to be more stable on the...
  12. J

    tach on 50hp

    Can I put a tach on a 50hp Merc, & run a guage on the dashboard? Where can I get one, & how hard to hook up to motor?
  13. J

    Lower leg unit

    On my 1973 Mercury 50hp, if I put the lever in neutral, I can spin the prop both ways freely, if I put the lever in forward, I can't turn it to the left & it will ratchet to the right. If I bring it towards reverse there's kind of a first notch,(kind of a stop), it ratchets both ways, if I bring...
  14. J

    !973 50hp leg unit replacement

    The leg has to be replaced on my 1973 50hp Mercury.. I found a guy that has a leg from a 84/85 50hp Merc. he says it will fit on my motor, is he correct? also the skeg has a small piece broke off the tip & has a small bend in it, can these be rebuilt & straightened, or will it work fine leaving...
  15. J

    Bearings go in the leg 73 50hp

    I just bought this boat with a 1973 50hp Mercury.. I checked with the previous owner, & he traded it of because the bearings keep going out in the leg.. Would I just have to get another shaft or should I look for another used leg.. The previous owner thinks the shaft is bent, because he had to...
  16. J

    What year is my motor?

    I bought a boat with a 50hp Mercury on it. It says 50 hp not 500... It says Power tilt/trim on the motor. the serial number is 7022591 . I tried to do a search, but couldn't find it.. thanks..
  17. J

    Water jacket gaskets 72 Johnson 65hp

    I took off the water jacket, (don't know the right name), with 19 bolts in it on the side of the motor. . It has 3 pieces to it. There was a leak out of the bottom of the gasket the one that goes against the motor block. I checked with a straight edge & appears fine, but can't tell exactly...
  18. J

    Dropping the bottom cowl

    I have to drop the bottom cowl on my 1972 Johnson 65hp. Does anyone have a diagram of which bolts to take off or loosen? or point me to where I can see it..? thanks
  19. J

    bubbles in fuel line

    1972 Johnson 65hp. there's a very short plastic hose coming out of the middle carb to a T, then a plastic hose going to the top carb & one goes to the bottom carb.. When I flick the hose with my finger tip it looks like fine air bubbles up to the top carb, & fine bubbles below the T to the...
  20. J

    72 Johnson 65 hp.. I'M STUMPED

    I have a dilemma with my 1972 Johnson 65hp.. I just bought this boat not long ago, & I changed oil in the leg to service it, went out on the lake & found out I had no neutral or reverse. but it did troll in neutral & when I pushed forward on the lever it dug right in & planed out. So after a "no...
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