'84 Johnson 50 hp, Need advice

[maggun]

Nr 1 cylinder fires with piston in top and bottom position, nr 2 fires normal i.e. in top position.<br /><br />Im thinking it's the power pack, can anyone comment on that ?

 

[OBJ]

Re: '84 Johnson 50 hp, Need advice

Maggun....I'm curious to know how you determined this. I have an 84' 50hp myself.<br /><br />It would seem to me that since the two cylinders fire opposite, that the timer coil would have to somehow be firing both. If it were bare wires then No 1 would be firing No 2 when it fires. So if indeed what you say is happening, the pack would be at fault.<br /><br />Keep us posted....thanks.

 

[maggun]

Re: '84 Johnson 50 hp, Need advice

I used a stroboscope to discover this. I also noticed nr 1 switches between firing at top, bottom, and both. Nr 2. is working ok, and firing only in top position as it should.<br /><br />Check this clip Ignition timing <br /><br />Open videoclip in quicktime.

 

[maggun]

Re: '84 Johnson 50 hp, Need advice

Thought I might mention..<br /><br />Symptoms is poor performance in general, struggles to get in plane, nr 1 dies quickly if I take the spark plug cap off of nr 2 cylinder. Random sudden drop in rpm...<br /><br />Yes the clip is kind of poor in quality, but if you know what to look for, it should be ok..