O.S. Engines

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Quality and performance has made O.S. the standard in RC engines for over 80 years.
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318-365 of 1,758 Results
Cover Plate: 21VG-P Cover Plate: 21VG-P
3.7 out of 5 Customer Rating
Cover Plate: 21VG-P
$13.78
Outer Head: R2102 Speed Outer Head: R2102 Speed
5 out of 5 Customer Rating
Outer Head: R2102 Speed
$91.34
Piston Pin: 30VG Piston Pin: 30VG
4.7 out of 5 Customer Rating
Piston Pin: 30VG
$11.91
Breather Nipple: FS-20, 40 Breather Nipple: FS-20, 40
3.4 out of 5 Customer Rating
Breather Nipple: FS-20, 40
$6.49
Cam Cover: FS-120 III Cam Cover: FS-120 III
3.4 out of 5 Customer Rating
Cam Cover: FS-120 III
$3.26 Price reduced from $10.86 to
Clearance Sale! ⓘ
Carburetor Body: #60M Carburetor Body: #60M
3.4 out of 5 Customer Rating
Carburetor Body: #60M
$21.43 Price reduced from $71.43 to
Clearance Sale! ⓘ
Crankcase: 37SZ-H Crankcase: 37SZ-H
5 out of 5 Customer Rating
Crankcase: 37SZ-H
$52.69
Water Nipple: #2 Water Nipple: #2
5 out of 5 Customer Rating
Water Nipple: #2
$6.49
Muffler F6020; FS155A-P Muffler F6020; FS155A-P
5 out of 5 Customer Rating
Muffler F6020; FS155A-P
$87.21
Assembly Screw E3080: 35AX Assembly Screw E3080: 35AX
5 out of 5 Customer Rating
Assembly Screw E3080: 35AX
$8.43
Pushrod Cover Assembly: FS-70 Ultimate Pushrod Cover Assembly: FS-70 Ultimate
5 out of 5 Customer Rating
Pushrod Cover Assembly: FS-70 Ultimate
$17.99
Rocker Cover: 200 Surpass Rocker Cover: 200 Surpass
4.4 out of 5 Customer Rating
Rocker Cover: 200 Surpass
$22.04
Screw Set (8): 25LA Screw Set (8): 25LA
3.2 out of 5 Customer Rating
Screw Set (8): 25LA
$8.43
Carburetor Complete #61N: FS72 Alpha Carburetor Complete #61N: FS72 Alpha
5 out of 5 Customer Rating
Carburetor Complete #61N: FS72 Alpha
$102.96
60 Degree Exhaust Header: 155FS-a 60 Degree Exhaust Header: 155FS-a
4.8 out of 5 Customer Rating
60 Degree Exhaust Header: 155FS-a
$14.55 Price reduced from $48.51 to
Clearance Sale! ⓘ
Rear Bearing: FS52 Rear Bearing: FS52
5 out of 5 Customer Rating
Rear Bearing: FS52
$22.04
Carburetor Rotor: #120AX Carburetor Rotor: #120AX
5 out of 5 Customer Rating
Carburetor Rotor: #120AX
$37.80
Crankcase: 200 Surpass Crankcase: 200 Surpass
3.4 out of 5 Customer Rating
Crankcase: 200 Surpass
$190.28
Piston: 56 FS Piston: 56 FS
4 out of 5 Customer Rating
Piston: 56 FS
$29.49
Cylinder Head with Valves: FS120SE Cylinder Head with Valves: FS120SE
4.2 out of 5 Customer Rating
Cylinder Head with Valves: FS120SE
$185.03
Cylinder Head & Valve: FF-320 Cylinder Head & Valve: FF-320
5 out of 5 Customer Rating
Cylinder Head & Valve: FF-320
$135.66
Cylinder Liner: 91SZ-H Cylinder Liner: 91SZ-H
4.8 out of 5 Customer Rating
Cylinder Liner: 91SZ-H
$99.65
Super Can Filter, Small Super Can Filter, Small
4.4 out of 5 Customer Rating
Super Can Filter, Small
$11.80
Pulse Spacer: GGT10 Pulse Spacer: GGT10
5 out of 5 Customer Rating
Pulse Spacer: GGT10
$17.11
Rocker Arm Assembly FS-20 Rocker Arm Assembly FS-20
5 out of 5 Customer Rating
Rocker Arm Assembly FS-20
$22.04
Valve: FS-40 48Surpass Valve: FS-40 48Surpass
3.6 out of 5 Customer Rating
Valve: FS-40 48Surpass
$21.10
Rotor Spring #2CK #2B Rotor Spring #2CK #2B
5 out of 5 Customer Rating
Rotor Spring #2CK #2B
$6.49
Cylinder Rebuild Kit: R21 Cylinder Rebuild Kit: R21
4.4 out of 5 Customer Rating
Cylinder Rebuild Kit: R21
$188.45
Outer Head: O.S. Speed R2104 Outer Head: O.S. Speed R2104
3.6 out of 5 Customer Rating
Outer Head: O.S. Speed R2104
$148.60
Pump Body Assembly: WLA-2 GT55 Pump Body Assembly: WLA-2 GT55
4.2 out of 5 Customer Rating
Pump Body Assembly: WLA-2 GT55
$32.99
Radial Mount: Sirius 7 Radial Mount: Sirius 7
5 out of 5 Customer Rating
Radial Mount: Sirius 7
$135.66
Camshaft: FS-91-P Camshaft: FS-91-P
4.8 out of 5 Customer Rating
Camshaft: FS-91-P
$60.72
Carburetor Body: #70C Carburetor Body: #70C
4 out of 5 Customer Rating
Carburetor Body: #70C
$87.39
Choke Valve: WLA-2, GT55 Choke Valve: WLA-2, GT55
5 out of 5 Customer Rating
Choke Valve: WLA-2, GT55
$14.99
Rear Cover Plate: GT22 Rear Cover Plate: GT22
5 out of 5 Customer Rating
Rear Cover Plate: GT22
$30.44
Crankcase: 95AX Crankcase: 95AX
4.4 out of 5 Customer Rating
Crankcase: 95AX
$125.04
Cylinder Liner: FS110A Cylinder Liner: FS110A
5 out of 5 Customer Rating
Cylinder Liner: FS110A
$49.46
Muffler Screw: 120AX Muffler Screw: 120AX
4.4 out of 5 Customer Rating
Muffler Screw: 120AX
$8.43
Muffler Assembly Screw #E-2030 Muffler Assembly Screw #E-2030
5 out of 5 Customer Rating
Muffler Assembly Screw #E-2030
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
O-Ring Large: 120Surpass O-Ring Large: 120Surpass
5 out of 5 Customer Rating
O-Ring Large: 120Surpass
$6.49
Piston Ring: FS110A Piston Ring: FS110A
5 out of 5 Customer Rating
Piston Ring: FS110A
$29.49
Rocker Support: FS155A-P Rocker Support: FS155A-P
5 out of 5 Customer Rating
Rocker Support: FS155A-P
$11.68 Price reduced from $38.95 to
Clearance Sale! ⓘ
Throttle Lever: 120Surpass Throttle Lever: 120Surpass
3.6 out of 5 Customer Rating
Throttle Lever: 120Surpass
$6.49
Cover Plate: GF30 II Cover Plate: GF30 II
4.2 out of 5 Customer Rating
Cover Plate: GF30 II
$44.17
Rear Bearing: 50SX-H, 55HZ, 55AX Rear Bearing: 50SX-H, 55HZ, 55AX
5 out of 5 Customer Rating
Rear Bearing: 50SX-H, 55HZ, 55AX
$34.76
Rear Bearing: GT60 Rear Bearing: GT60
3.8 out of 5 Customer Rating
Rear Bearing: GT60
$25.44
Carburetor Rotor: 61T, FS-62V Carburetor Rotor: 61T, FS-62V
3.6 out of 5 Customer Rating
Carburetor Rotor: 61T, FS-62V
$9.13 Price reduced from $30.44 to
Clearance Sale! ⓘ
Crankshaft: 200 Surpass Crankshaft: 200 Surpass
4 out of 5 Customer Rating
Crankshaft: 200 Surpass
$37.62 Price reduced from $125.39 to
Clearance Sale! ⓘ
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