Attached is an original service bulletin from BMC Australia. The text of the bulletin is as follows:
MISFIRING, SURGE & CARBURETTER FLOODING
Some engines suffer certain vibrations, even though they may be to a good standard of balance, and this may produce surge and misfiring on pick-up and during light throttle cruising.
Such faults may be prevented by changing the carburetter rubber grommets 'A' to Part No. AUD 2676 (front) and AUD 2677 (rear). Additionally, carburetter needles should be changed from GY to AN.
If flooding has been occurring, new float chamber needles and seats should be fitted, as the existing ones may have become ridged.
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