50hp johnson

Discussion in 'Outboards' started by astull, May 6, 2012.

  1. astull
    Joined: Jun 2011
    Posts: 15
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Ford City PA

    astull astull

    I have a 1997 50 hp johnson outboard went to run it for first time today cranking over good but not firing boat ran great when i pulled it last fall any ideas
  2. souljour2000
    Joined: Aug 2009
    Posts: 481
    Likes: 14, Points: 18, Legacy Rep: 195
    Location: SW Florida

    souljour2000 Senior Member

    Id go to outboard forum or iboat.com or one of those online forums where you can ask questions... you probably have dirty carb though or bad plugs but it could be a few things...if it sat since last fall with gas in the carb bowl then its probably plugged the tiny jets in the carb...
  3. villacose
    Joined: Dec 2011
    Posts: 13
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Houston, TX

    villacose Junior Member

    Johnson's are incredibly reliable, i had a 1996 40 hp and ran it year after year after year in Alaska and never did anything to it, but one thing that can happen to a lot of engines is that over a cold winter the vacuum lines crack or slip off the nipples. this is really common on chainsaws too. i would look over every single thing you can without taking anything apart, check for dirty connections, etc, before taking it to someone if you can't fix it yourself.
  4. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 491, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Some simple tests will reveal all on your 50 HP. See if she has fire at the plugs with a tester or spare plug grounded against the block. If you have a spark then it's fuel delivery (the most likely issue). If you left fuel in it over the winter, it's probably gummed up all the passages and needs a complete cleaning. If you don't have spark, then you need to check out the ignition system.

  5. astull
    Joined: Jun 2011
    Posts: 15
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Ford City PA

    astull astull

    thanks for all the help got it narrowed down to dirty carbs going to clean them tommorrow
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.