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Robin Subaru EA175V Vertical Engine

The new Robin 4.5hp 174cc overhead cam engine for lawnmowers.

Featuring a vertical shaft configuration, Subaru's new EA175V 4.5hp is the first engine to offer chain-driven overhead cam (OHC) technology to the small, air-cooled, vertical shaft engine market. Featuring an innovative and completely original design, the engine is built lightweight, yet rugged and powerful enough for demanding applications such as; lawn mower and garden applications including pressure washers, walk behind string trimmers, aerators and lawn vacs to name a few. By incorporating industry-leading technology and numerous advanced features, the vertical shaft engine offer superior power and reliability to competitive engines.

Standard Features:
Forged Crankshaft
Cast Iron Cylinder Liner
Overhead Cam Chain Drive Technology
High Efficient Hemispherical Combustion Chamber
High Compression Ratio for Higher Power and Torque
Large Recoil for greater pulling leverage
Optimized Cooling Fins and Air Circulation for long engine life
Ball Bearing Supported Crankshaft
Low Tone Muffler
Dual Lobe Camshaft for easier starts


Engine Air Cooled, 4-Stroke, Overhead Cam, Chain Drive, Gasoline Engine
Cylinders 1
Displacement 174cc
Cycles 4
Fuel Automotive Unleaded
Max HP (/RPM) 4.5/3600
Bore x Stroke (mm) 68 x 48
Compression Ratio 9:1
Starter Recoil
Fuel Capacity 1qt (1L)
Lubrication SAE10W-30; (System) Splach with Chain Carry
Air Cleaner System Paper with foam pre-cleaner
Ignition Solid State
Fuel System Carburetor with Float


Dry Weight 28.6 lbs (13 kg)
Length (in (mm)) 397
Width (in (mm)) 350
Height (in (mm)) 268