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  1. D

    spark plug - which one?

    I am having trouble cross-referencing the manual to current spark plugs so I can get replacements. I had a friend tune up the motor, but I still had problems. An old boat mechanic looked at it and said the plugs were not correct, causing them to gum up after only one day of use. The friend...
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    Recurring problem starting a '67 Johnson Seahorse

    This same thing happened a few weeks ago. A friend cleaned things out, changed plugs, and it ran great a week ago. Put in lake today and repeat. First turn of key motor starts right up. It idles a little rough as I play with starter lever. Runs about 30 seconds and stalls. Then not able to...
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    heavy exhaust - running rich?

    I have a 1967 Johnson 80 hp outboard. It seems to be running a little rich. The exhaust is pretty heavy when sitting and idling. I saw elsewhere on this forum that the 50:1 mixture should be maintained for proper lubrication. Is there an additive or something else I can do to run cleaner? I...
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    Lost drive pin

    I have a 1967 Johnson 80 hp outboard. I will admit up front that I am not very mechanically inclined. Anyway, after running great for a few hours Sunday, i hit bottom in the river - not very hard though. So I suddenly lose all thrust. Engine revs but nothing from the prop. I get 'er home...
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