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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1,201-1,248 of 1,758 Results
Cam Cover: FS155A-P Cam Cover: FS155A-P
5 out of 5 Customer Rating
$3.57 Price reduced from $11.91 to
Clearance Sale!
Cam Cover: FS-95V Cam Cover: FS-95V
5 out of 5 Customer Rating
$11.95
Back Plate: 40-46 LA Back Plate: 40-46 LA
5 out of 5 Customer Rating
$11.80
Cylinder & Piston: 35AX Cylinder & Piston: 35AX
5 out of 5 Customer Rating
$29.85 Price reduced from $99.51 to
Clearance Sale!
Camshaft Bearing: F 120-300 Camshaft Bearing: F 120-300
4.5 out of 5 Customer Rating
$22.37
Back Plate: Sirius 7 Back Plate: Sirius 7
4.2 out of 5 Customer Rating
$192.56 Price reduced from $466.21 to
Clearance Sale!
O.S. Cylindr & Piston Assy OS Speed R21GT O.S. Cylindr & Piston Assy OS Speed R21GT
4.4 out of 5 Customer Rating
$69.66 Price reduced from $232.21 to
Clearance Sale!
Carburetor #21L: 25AX Carburetor #21L: 25AX
5 out of 5 Customer Rating
$29.34 Price reduced from $97.81 to
Clearance Sale!
Carburetor 61HB: GGT10 Gasoline Engine Carburetor 61HB: GGT10 Gasoline Engine
5 out of 5 Customer Rating
$147.01
Idle Gear: IL-300 Dia Star Idle Gear: IL-300 Dia Star
4.5 out of 5 Customer Rating
$29.47
Long Socket Wrench With Plug Grip Long Socket Wrench With Plug Grip
3.8 out of 5 Customer Rating
$19.16
Speed Flywheel Puller Speed Flywheel Puller
4 out of 5 Customer Rating
$48.34
Inner Head: R2101 Speed Inner Head: R2101 Speed
4 out of 5 Customer Rating
$52.69
Mixture Control Screw #11L Mixture Control Screw #11L
5 out of 5 Customer Rating
$11.80
Muffler Body F-5050: FS-95V Muffler Body F-5050: FS-95V
5 out of 5 Customer Rating
$52.73
Muffler E-5040: GT22 Muffler E-5040: GT22
5 out of 5 Customer Rating
$91.51
O.S. Metering Needle Assembly 22D Speed B2103 O.S. Metering Needle Assembly 22D Speed B2103
3.4 out of 5 Customer Rating
$19.14
Manifold Nut M9 Manifold Nut M9
3.6 out of 5 Customer Rating
$6.49
Needle Assembly #10E Needle Assembly #10E
5 out of 5 Customer Rating
$25.44
Metering Needle Assembly 22C(B): Speed B2102 Metering Needle Assembly 22C(B): Speed B2102
5 out of 5 Customer Rating
$5.74 Price reduced from $19.14 to
Clearance Sale!
Needle Valve Assembly: 91SZ-H Hyper Needle Valve Assembly: 91SZ-H Hyper
5 out of 5 Customer Rating
$29.60
Needle #7M #7LFS Needle #7M #7LFS
3.6 out of 5 Customer Rating
$13.78
Needle Valve Assembly: #60B Needle Valve Assembly: #60B
3.6 out of 5 Customer Rating
$22.30
Link Pin E-Ring: Sirius 7 Link Pin E-Ring: Sirius 7
4.4 out of 5 Customer Rating
$6.49
Locknut Nozzle #2BK Locknut Nozzle #2BK
5 out of 5 Customer Rating
$2.59 Price reduced from $8.66 to
Clearance Sale!
Locknut Set: BGX 3500 Locknut Set: BGX 3500
3.2 out of 5 Customer Rating
$26.24
Manifold Seal: FT-120-300 Manifold Seal: FT-120-300
3.6 out of 5 Customer Rating
$11.84
Mixture Control Valve #70C: FS120 Surpass II Mixture Control Valve #70C: FS120 Surpass II
4 out of 5 Customer Rating
$22.26
Mixture Control Valve #10A Mixture Control Valve #10A
3.6 out of 5 Customer Rating
$13.67
Muffler Fixing Screw E-4051: GT15HZ Muffler Fixing Screw E-4051: GT15HZ
5 out of 5 Customer Rating
$11.80
Mid Needle Valve Assebly: 61ER, 941HZ-R Mid Needle Valve Assebly: 61ER, 941HZ-R
3.6 out of 5 Customer Rating
$22.30
Needle Assembly #40N Needle Assembly #40N
4 out of 5 Customer Rating
$22.04
Back Plate Assembly O.S. Speed B21 Adam Drake Edition 3 Back Plate Assembly O.S. Speed B21 Adam Drake Edition 3
4.2 out of 5 Customer Rating
$12.59 Price reduced from $41.99 to
Clearance Sale!
M2000SC 75mm Exhaust Manifold M2000SC 75mm Exhaust Manifold
3.4 out of 5 Customer Rating
$63.18
Cover Plate: GT55 Cover Plate: GT55
5 out of 5 Customer Rating
$41.99
Cylinder Liner: GT55 Cylinder Liner: GT55
4.2 out of 5 Customer Rating
$44.33 Price reduced from $118.99 to
Clearance Sale!
Muffler Assembly Screw F-5050 FS-95V Muffler Assembly Screw F-5050 FS-95V
3.6 out of 5 Customer Rating
$10.94
Needle: 15LA Needle: 15LA
3.4 out of 5 Customer Rating
$9.85
Needle Control Lever In Flight Needle Valve Needle Control Lever In Flight Needle Valve
3.4 out of 5 Customer Rating
$6.49
O-Ring S3-FKM 61H: GT15 O-Ring S3-FKM 61H: GT15
5 out of 5 Customer Rating
$10.94
Front Housing: Sirius 7 Front Housing: Sirius 7
4.4 out of 5 Customer Rating
$210.06 Price reduced from $519.74 to
Clearance Sale!
Muffler Assembly Screw E2050-2: 21XM V2 Outboard Muffler Assembly Screw E2050-2: 21XM V2 Outboard
4 out of 5 Customer Rating
$9.44
Piston Pin Retainers: Speed T1202 (6) Piston Pin Retainers: Speed T1202 (6)
5 out of 5 Customer Rating
$3.28 Price reduced from $10.94 to
Clearance Sale!
Reed Valve Assembly: GT22 Reed Valve Assembly: GT22
5 out of 5 Customer Rating
$26.99
Speed Hex Driver Replacement Tip 2.5 Speed Hex Driver Replacement Tip 2.5
3.6 out of 5 Customer Rating
$5.52 Price reduced from $18.39 to
Clearance Sale!
Valve: FS-95V Valve: FS-95V
5 out of 5 Customer Rating
$25.44
Valve Spring Intake: FS-120 Surpass Valve Spring Intake: FS-120 Surpass
4.4 out of 5 Customer Rating
$6.49
Venturi #61N: FS72A Venturi #61N: FS72A
4.4 out of 5 Customer Rating
$5.74 Price reduced from $19.14 to
Clearance Sale!