Briggs Engine, BS550ex


Note – This is a hover mower engine and therefore has a different crankshaft than you would have on a lawnmower, pressure washer, etc. Make sure you check the model number on your hover mower before ordering. Fits Greenman GHG190T,BS550 and Cal Trimmer RC190T,BS550 hover mowers.

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Engine Type Air-cooled 4-stroke OHC
Bore x Stroke 2.5″ x 2.0″ (64 mm x 50 mm)
Displacement 9.8 cu in (160 cm3)
Net Power Output* 4.4 HP (3.3 kW) @ 3600 rpm
Net Torque 6.9 lb-ft (9.4 Nm) @ 2500 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 8.5:1
Carburetor Horizontal type butterfly valve
Ignition System Transistorized magneto
Starting System Recoil/electric
Air Cleaner Dry (paper filter)
Governor System Centrifugal Mechanical
Fuel Tank Capacity .98 U.S. qts (.93 liter)
Fuel Unleaded 86 octane or higher
Oil Capacity 0.58 US qt (0.55l)
Lubrication System Splash
Dry Weight 24.0 lbs (10.91 kg)
Weight 30 lbs
Dimensions 16 × 16 × 16 in