Zenoah PUM320, Watercooled 32 cc Marine Engine

Compared to its predecessors, the Zenoah G260PUM and Zenoah G300PUM, this model has changed a lot. The capacity was increased to 31.8ccm. Here, the cylinder and the piston ring were redesigned. This is now very narrow and has a semicircular profile. The Zenoah G320PUM has larger ball bearings and a larger crankshaft with connecting rod. However, the crankshaft cone and the internal thread remained the same.

The mounting hole on the pull starter side has remained the same but has changed on the crankshaft side.

Technical Details:

• Cylinder displacement: 31.8 cm³ / 1.94 cu.inch
• Cylinder bore:38 mm / 1.5 inch
• Cylinder stroke:28 mm / 1.1 inch
• Power output:4,36PK-3.35 kW
• Effective Compression Ratio: 9,7
  
• Recomended Fuel: 40 cc oil on 1 litre gasoline, (1:25)
  
• Idling Speed: ca. 4200 RPM
  
• Max RPM: ca. 20.000 RPM
  
• Fuel Consumption: ca. 604g/kw h
• Carburettor:Walbro WT1107
• Ignition system:CDI
• Spark plug:NGK CMR7H
• Starting system:Recoil starter
• Weight:1.93 kg / 4.25 lbs
• Measurements:157-166-183 mm / 6.18x6.54x7.2 inch