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    Purpose of the shallow passages on the back side of head covers?

    I recently changed the head cover gaskets on a 1989 Johnson 100 v4 crossflow. I noticed that there are shallow passages on the back side on the head cover and that the head cover gasket completely covers these shallow passages when installed. I wonder why they are designed this way. Are the...
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    Add VRO to a 1982 Johnson 115

    Can you take the VRO off a 1989 Johnson 100 HP and put it on a 1982 Johnson 115 HP? I have a 1990 Crestliner with an in-floor 20 gallon tank and a failing 1989 Johnson 100 HP motor. I can pick up a great running 1982 Johnson 115 HP motor and want to do a motor or powerhead swap but want to...
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