Engine surging after tune up

teahead

aka "Rob"
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Probably coincidence but last week, engine running a bit rough when it warms up.

So...decided to do a tune up (points, cap, plugs, fuel filter ). Now it's surging like crazy ; hot or cold.



Spark plugs kinda black.

Too rich I assume? How to adjust?

20170621_185101-1.jpg
 

Stevehose

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plugs are black, is one or both carbs' float flooding? you can see into the float chamber with a flashlight. all vacuum connections back on and tight?
 

deQuincey

Quousque tandem...?
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never saw this behaviour,
my opinion is that in order to help you should detail your work in that engine
you must have done something odd
what
how
how much
those are relevant questions
every detail counts
 

teahead

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plugs are black, is one or both carbs' float flooding? you can see into the float chamber with a flashlight. all vacuum connections back on and tight?


I'll have to check. Didn't know you can see the float chamber from looking down into it.

I doubt new points, plugs, filter, dist cap would cause this. i think it was coincidence and probably something screwed up w/the carbs like a stuck float or something.
 
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