Aircooled VW South Africa

Hi All

I have a 1500 sp motor in my beetle which occasionally fouls up plug no 2. Plugs 1 and 3 are fine, plug 4 has slight black soot on it and plug 2 has lots of soot on it, how is this possible? valves are correctly set.
If I lean the carb then the motor runs like crap any ideas?

If you currently have NGK plugs, try exhanging them for Champion L87YC

will try that thanks

after many months of changing plugs, setting valves, setting timing, tuning carb until blue in the face, motor still running and fouling plugs 4 and 2, I decide to take a look at the automatic choke.
It was not fully opening when motor was warm, adjusted it and now running sweet.
This has been a long road with such a simple solution, I've paid my school fees on this one

Thanks for reporting back, I'm sure it will help someone else.

Glad you back up and running.
It is amazing how the fuel distribution changes due to firing order on these engines. I've always wondered which cylinder of the pair runs richer, now we know, its the first to fire on the head... 2 and 4
Thanks for that