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    lawrencecharles's Avatar
    lawrencecharles Posts: 3, Reputation: 0
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    #1

    Apr 28, 2011, 03:33 PM
    2004 Johnson 4 stroke outboard motor
    How do you change the spark plugs?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Apr 28, 2011, 03:37 PM

    Most Unscrew, and Screw back in.
    Buy your Replacement set, This will determine which Plug Wrench you'll need.
    If you don't feel you can remove and replace, at least you will have the parts and All Mechanics, and many people can install for you.
    lawrencecharles's Avatar
    lawrencecharles Posts: 3, Reputation: 0
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    #3

    Apr 29, 2011, 10:45 AM
    The spark plug has a cover or cap over the top of the spark plug,I don't have any idea how to take it off without causing damage. Motor is a 2004 40 hp 4 stroke Johnson.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #4

    Apr 29, 2011, 04:03 PM

    If you like this motor and are going to be working on it. I would Buy the Shop Manual, It will save Time and Money.
    lawrencecharles's Avatar
    lawrencecharles Posts: 3, Reputation: 0
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    #5

    Apr 30, 2011, 05:31 AM
    Thank you for your help. Larry
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