Graupner,ZENOAH G231 PUM,1939

ZENOAH G231 PUM Graupner 1939 Water-cooled. High-performance petrol engine in water-cooled form. Maintenance-free electronic ignition system and integral pull-cord starter. Suitable for fairly large model boats including motor yachts, off-shore and dragster racers. Right-hand rotation, as seen from the engine looking towards the output shaft.

Capacity 22.5 cc
Output power 2.09 kW at 12,000 rpm
Weight approx. 1.55 kg
Cooling system Water
Fuel mix (oil/petrol) approx. 1:25