Evening all - At last today have had a chance to re-visit the garage to try and resolve the rough idle on my 1966 500F. The list of items replaced thusfar are as follows. A service kit was bought for the 26IMB 10 Carburettor and was cleaned as much as possible and any debris removed with an airline. The fuel mixture has been checked with a Colortune and is showing a nice Bunsen blue colour ( currently carb mixture screw is 1 1/2 turns out). I have set the static timing using a test lamp which lights at 10 deg BTDC using the timing gauge.
As per the attached video the roughness seems to smooth out when the revs are lifted but when idling the engine rocks and sounds like it is missing. Hoping for any divine inspiration, given the list of parts all ready changed I am running low on ideas
. Could it be a worn carburettor or idle jet issue. The fuel flow is constant though I do get the occasional bubbles appearing in the fuel pipe
More than happy for any suggestions or areas to re-check if I had hair I would be pulling it out by now
. The carburettor is stamped 'Made in Italy' is it possible this is the original carburettor
Ignition Coil
Distributor Cap
Rotor arm
Spark Plugs
Spark Plug Leads
Contact Points
Condenser now changed to a Swifttune
Fuel pump
Fuel tank sender
Many Thanks again
Barry
As per the attached video the roughness seems to smooth out when the revs are lifted but when idling the engine rocks and sounds like it is missing. Hoping for any divine inspiration, given the list of parts all ready changed I am running low on ideas
More than happy for any suggestions or areas to re-check if I had hair I would be pulling it out by now
Ignition Coil
Distributor Cap
Rotor arm
Spark Plugs
Spark Plug Leads
Contact Points
Condenser now changed to a Swifttune
Fuel pump
Fuel tank sender
Many Thanks again
Barry