evinrude two cylinder 2 stroke 4hp

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kieronriley

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my outboard is only firing on the bottom cylinder I hav changed the plug but still not firing, I don't think there is any spark atall,any ideas,many thanks. Kieron
 
kieronriley said:
my outboard is only firing on the bottom cylinder I hav changed the plug but still not firing, I don't think there is any spark atall,any ideas,many thanks. Kieron
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What is the model number ( not serial) onthe ID plate on the transom clamp bracket. That will identify it precisely and we will know exactly what we are talking about.

As far as I know all Johnson 2 cylinder 4 hp 2 strokes were genuine Johnsons. but depending on age could have different ignition systems .

Check the sparks with a spark tester ( improvised if necessary). A points system should give a good spark which will jump about 3/8" . A CD system a little more
 
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VicS said:
What is the model number ( not serial) onthe ID plate on the transom clamp bracket. That will identify it precisely and we will know exactly what we are talking about.

As far as I know all Johnson 2 cylinder 4 hp 2 strokes were genuine Johnsons. but depending on age could have different ignition systems .

Check the sparks with a spark tester ( improvised if necessary). A points system should give a good spark which will jump about 3/8" . A CD system a little more
Click to expand...

This sounds like quite an old engine. We have a 4hp Johnson twin from the 60(?)s and I remember an evinrude 'Speed Twin' 4hp from the same era. So well before CD ignition.
I will go out to the shed and have a look, but think it is as mentioned. One coil and both plugs spark at the same time.
Might you have a duff plug?

Just seen that you changed the plug.. So the lead?
 
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DownWest said:
This sounds like quite an old engine. We have a 4hp Johnson twin from the 60(?)s and I remember an evinrude 'Speed Twin' 4hp from the same era. So well before CD ignition.
I will go out to the shed and have a look, but think it is as mentioned. One coil and both plugs spark at the same time.
Might you have a duff plug?

Just seen that you changed the plug.. So the lead?
Click to expand...

It could be as recent as 2001..... the model number will tell us the age and the parts lists will tell if it is a CD ignition or points ignition. There was time when some OMC 4hp models had points ignition while others had CD.

1969 is the only year in the 1960s for which a 4 HP Johnson or Evinrude is listed ( although there were much earlier (back to 1916 in the case of Evinrudes). The 1969 model has two sets of points and coils
 
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