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    My old '84 yamaha 40 hp 2 stroke is idling and running a bit rough.

    Hello. I have a Yamaha 40 hp which I have problems with the idling. When I start it (usually most when it's cold), it idles pretty rough and at low speed I feel it's not quite right. It coughs a lot. When it gets up to speed. 8-22 knots it almost never misfire. It's very rare I have problems...
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    Yamaha 40 hp 2 stroke 84-86 mod won't start with key.

    Hello my fellow boaters! I have a Yamaha 40 HP, 3 cyl, 2 stroke 84-86 mod which had HAND start before, but I got a parts-engine for free so I built it to a outboard with electrical start. The starter has worked fine for a long time, but one day it suddenly wouldn't start by using key. The...
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    Yamaha 40 hp 2 stroke, 80's outboard running rough.

    Hello. I have a Yamaha 40hp 2 stroke (3 cyl) engine from early 80's somewhere. There are no numbers on the engine, so I'm not sure what model exactly. Before the boat season ended the engine ran very rough. Especially on idle, but it also made some noises in higher RPM's too. Also I felt it...
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