Starter Motor – Gear Reduction. ISKRA 4.2 KW GEAR REDUCTION TYPE. 9 TEETH 12 VOLTS 4.2 KW. EXCEPT FOR THE HIGHLANDS, ISLANDS OR NORTHERN IRELAND. IF YOU NEED FURTHER INFORMATION. We post everyday Monday to Friday. Are dispatched the same day. Please note that OEM Numbers are for cross reference purposes only and do not imply that original parts will be supplied (unless stated).