90 hp johnson

Discussion in 'Bubba's Outboards' started by MBeggs, Sep 26, 2005.

  1. MBeggs

    MBeggs New Member

    Messages:
    14
    State:
    tennessee
    I have a 99 90 hp johnson. Ran great until two weeks ago. It has developed a miss. I changed plugs and fuel filter. It will run when first in water and then misses bad after a few minutes of running. It completly quit last time. I trolled back to dock.(1 hour). Ran fine when loading it up. I know it s time to see the mechanic. Just wondering what the damage may be? Thanks!

    Mark Beggs
    Church Hill Tn
     
  2. Aquacat

    Aquacat New Member

    Messages:
    346
    State:
    Sherman, Texas
    mbeggs, it sounds like you have a electrical problem.
     

  3. Bobpaul

    Bobpaul New Member

    Messages:
    3,039
    State:
    Supply NC
    Mark, is that an OIS (optical ignition system)?
     
  4. MBeggs

    MBeggs New Member

    Messages:
    14
    State:
    tennessee
    Yes, I believe it is OIS. Thank you! I havent fished in a month. Time to pay the man.

    I ussually blow one about every 4 to 5 years. I feel overdue.
     
  5. Bobpaul

    Bobpaul New Member

    Messages:
    3,039
    State:
    Supply NC
    It sounds like the ignition module is going out on it, is why I asked.

    I can change one in about 20 minutes, if that's the problem.

    Your looking at cost of part and about 1 hr labor.