1987 johnson 40 h.p.

Discussion in 'Bubba's Outboards' started by dearl, Jun 7, 2009.

  1. dearl

    dearl Member

    North Carolina
    The motor runs good, 120 on each cylinder, everything is mechanicaly sound, but I want alittle more top end if possible. Is there anything I can do to pick up speed. I have it on a 89 17' tacker, that was modified to an open center console. Boat probalby weighs 12oo lbs if that. What pitch and size prop should I be running? I can probalby do 28 mph on calm water now. I dont want to go to a larger motor due to weight issues and I fish some very shallow water. Another question what is the maximum distance I can mount my fuel tank from the motor. I am trying to distribute some weight and I want to move the fuel tank to the front of the boat, I heard it was 8 ' but wanted to check before I did anything. Thanks
  2. coach

    coach New Member

    Greenville , Ms
    i ran a 16ft monarc on the misipy river for yrs with two tanks mounted up front........ never had a problem other than pinching the gas line one time .....:big_smile:

  3. Bobpaul

    Bobpaul New Member

    Supply NC
    8', Where do people come up with these numbers? :confused2:

    Like Coach said, put the tank where you want to.

    Get a tach installed, if you want to get the best performance.
  4. Laker2

    Laker2 New Member

    Hey Bobpaul- Good to see your smilin' face chiming in on this one- I still remember reading about a 16 ft jon boat with a 25 Merc and a home made jack plate:wink::smile2: