Dear Blumbly and Gadge,
I had a good look at the service bulletins kindly provided by Gadge and I think that I have incorrectly labelled the Carby as a G4. I'm mow confident that it is indeed an L.M. (I was of the belief that the idle speed knob inferred that it was G4 but this doesn't seem to be the case).
With regard to the smoking questions:
Do you know if it has been sitting for long? ..... It smoked on start despite clean new fuel, clean fuel tank and clean carby
How long did it smoke for? ....................... From start right through rev range for 10 min - It used a heap of fuel!
Was it thick smoke? ............................... Heavy blue smoke that resembled flooded engine but it ran well and had new needle.
I have a hunch that the rich mixture is causing the extreme fuel consumption and heavy smoke. As per service bulletins I still need to check that the seat is brass. I must admit that I am a little puzzled with the purpose of the G4 spray tube and the LM filler tube and whether these can by-pass and allow fuel to run directly into the carburetta throat and upset the correct air fuel ratio?
I'll get the replacement red spring that I originally asked about and put another needle in it and try it again on the coming weekend. It's starting to fine up in Melbourne, the grass is growing, final football is rapidly approaching so I know she'll be growling if I can't mow the lawns so I've got to get the bastar#d going.
I'll let you know how I fair and send some photos.
Cheers - Bumps
