You can telephone Atco-Qualcast(Bosch) Consumer Care on +44(0)8447360108 to obtain the 10 digit part number that you require or for any additional inquiries.
If you need any parts then we can supply them via the website below.
GardeningEssentials.co.uk
GardeningEssentials.co.uk
September 2010
Do you mean a 43? If this pre-dates 1995 with a black alloy engine block then it will have electronic ignition situates under the flywheel.
Fairly common fault although Atco/Qualcast no longer make the igntion module they are still available from Wipac for around £100 a pop.