vermilionfox Posted May 25, 2009 Share Posted May 25, 2009 I need some help on hoe to replace the spark plugs on my 2004 Johnson 115HP 4 stroke. Looked at the motor, and it's not obvious to me. I also looked at my factory service manual and no help there either. I can't see the plugs! I don't want to screw anything up.Thanks! Quote Link to comment Share on other sites More sharing options...
boatfixer Posted May 25, 2009 Share Posted May 25, 2009 Just follow the plugs wire to them. The plugs are hidden in the cylinder cover. Quote Link to comment Share on other sites More sharing options...
marine_man Posted May 26, 2009 Share Posted May 26, 2009 They're recessed... so as Bruce said, follow them from the coil and pop them off. marine_man Quote Link to comment Share on other sites More sharing options...
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