25-11-13, 10:11 PM
Sticking float should also result in overflowing fuel but you might be on the right track. Could be the float needle valve seat O-rings letting fuel past, which would over-fuel the affected cylinder without actually overflowing.
I would also check the ignition switch (clean with WD40), the electrical connectors (particularly the large white one left side under the tank) and the various cut-out switches. Seems odd that the RAC man couldn't find a spark but then got the motor to run.
I'm thinking it might be a case of a fuel issue causing the plugs to wet up, presenting as no spark.
Have you isolated which two cylinders aren't running? Squirt water onto the header pipes to find the cold ones.
I would also check the ignition switch (clean with WD40), the electrical connectors (particularly the large white one left side under the tank) and the various cut-out switches. Seems odd that the RAC man couldn't find a spark but then got the motor to run.
I'm thinking it might be a case of a fuel issue causing the plugs to wet up, presenting as no spark.
Have you isolated which two cylinders aren't running? Squirt water onto the header pipes to find the cold ones.