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25hp Johnson won't idle and fouls plugs
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<blockquote data-quote="BentStick" data-source="post: 225748" data-attributes="member: 6997"><p>Hi all.</p><p></p><p> Just purchased my first boat, an '81 14ft Gregor with a 25hp Johnson and 7.5hp Chrysler kicker. The motors do run but the Johnson will not idle and fouls the plugs within a few hours. I have no idea how old the motor is but was told mid '70s. Can anyone point me in the right direction to resolve these two problems?</p><p></p><p> Also, I was advised to replace the lower end oil in both motors. A friend suggested that the Johnson would require 2 quarts. However when I drained and refilled it only took less than half a quart. Did I do something wrong? It looks pretty simple to me. The 7.5 took even less oil.</p><p></p><p>Thanks,</p><p>BentStick</p></blockquote><p></p>
[QUOTE="BentStick, post: 225748, member: 6997"] Hi all. Just purchased my first boat, an '81 14ft Gregor with a 25hp Johnson and 7.5hp Chrysler kicker. The motors do run but the Johnson will not idle and fouls the plugs within a few hours. I have no idea how old the motor is but was told mid '70s. Can anyone point me in the right direction to resolve these two problems? Also, I was advised to replace the lower end oil in both motors. A friend suggested that the Johnson would require 2 quarts. However when I drained and refilled it only took less than half a quart. Did I do something wrong? It looks pretty simple to me. The 7.5 took even less oil. Thanks, BentStick [/QUOTE]
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25hp Johnson won't idle and fouls plugs
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