SP-28 series

The SP-28 is the smallest single-cylinder engine in the 3W International portfolio. The engine is equipped with a carburetor and an improved cylinder design for a higher thermal stability. In the 2nd half of 2019 the engine will also be available with the new ignition SP-IGU.




> TS – Twin Spark, FI – Fuel Injection, HF – Heavy Fuel, ROS – Rear output shaft

General specifications

Type1-Cylinder Gas-Engine
Capacity28 ccm / 1.71 cu in
Powerca. 3.4 HP / 2.5W
Speed Range 2500 - 10000 RPM
Weight2.5 lbs (1.1 kg) incl. carburetor
Crankshaft3 ball bearings
Oil/Gasoline ratio1:50 / 2% mix
Operating Voltage6 - 48 V DC (depending on version)
Test method: Dynotest – Engine data might change due to the engine test procedure and the engine configuration.

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