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  1. J

    Only 2 of 3 cylinders working despite sparks, Johnson 70 hp 1978

    The other week, I encountered a strange problem with a Johnson 70 hp from 1978 (two stroke, 3 cyl.). I have had the boat+engine for about a month now, and the outboard engine has worked fine (nice sound, no problems starting etc) until now. The other day, I started the engine (no problems), let...
  2. J

    Johnson 70 hp 1978 does not reach full speed/rpm

    I bought a small boat with a Johnson 70 hp from 1978 (two stroke, 3 cyl.) this Spring. The outboard engine has worked fine (nice sound, no problems starting etc) until now. The other day, I started the engine (no problems), let it get warm and slowly drove away from the harbor; the engine...
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