Johnson 6hp spark plug gap
The Johnson model CD25R, is a 6hp outboard, produced in 1968.
My best guess would be about 5-8 mph
1979
The correct plug gap for the 1971 model, 6hp Johnson outboard, is .030-.035 in. It requires a Champion J6J, or NGK B6S.
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RJ8C Champion
140 lbs
You do not need a Skippers Ticket if the motor is UNDER 6hp. If it is 6hp, then you DO need a Skippers ticket. Our website has all the details about skippers tickets, plus there is a wikipedia page on it too.
The sticker on the side of my 6hp two stroke Suzuki OB reads 100 to 1. Unsure of the year.
.035
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