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This is the O.S. Max FR5-300 "Sirius" 4-Stroke, 5-Cylinder Radial Engine. Brand new in box. Made in Japan. This engine is very popular with the "Giant Scale" modelers with its abundant power, low vibration, smooth operation, and realistic noise levels.
This engine is the masterpiece of O.S. Multi-Cylinder 4-Stroke Engines!
FEATURES:
- Pushrod-Driven Overhead Valves
- Gear-Driven Camshaft
- Ball Bearing-Supported Crankshaft
- 5-Cylinder Radial Configuration Firing Order: 1-3-5-2-4
- Ringed Pistons
INCLUDES:
- One Motor mount with mounting hardware
- One Locking Prop Nut Assembly
- One Choke Valve Extension (rod)
- One Gauge Tool Set
- One Glow Plug Extension Harness
- Five #F glow plugs
- One Set of Instructions and Decals
SPECS:
Displacement: 9.96cc (x5) (.607 cid x5)
Bore: 24.0mm (.945")
Stroke: 22.0mm (.866")
Power Output: 4.0 BHP at 8,000 RPM
Practical RPM Range: 1,800 - 8,500 RPM
Weight: 2670g (94.2oz) w/mount
Length: 158.5mm (6.24") back of motor mount to front of drive washer
Diameter: 234mm (9.21")
Shaft Thread Size: 3/8-24
Engine Mount Dimensions: 5 Point Bolt Mount
Mount Inner Diameter: 4-1/8"
Mount Outer Diameter: 4-3/4"
Suggested Props: 18x12, 18x13, 18x14, 20x8, 20x9, 20x10, 22x8
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