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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702-749 of 1,758 Results
Cover Plate: FS-200S-P Cover Plate: FS-200S-P
4.1 out of 5 Customer Rating
Cover Plate: FS-200S-P
$25.44
Exhaust Pipe Nut: FS-120 III Exhaust Pipe Nut: FS-120 III
3.9 out of 5 Customer Rating
Exhaust Pipe Nut: FS-120 III
$6.49
Cylinder Head Gasket, .2mm: 91HZ Cylinder Head Gasket, .2mm: 91HZ
3.7 out of 5 Customer Rating
Cylinder Head Gasket, .2mm: 91HZ
$7.46
Mixture Control Valve 80T: Sirius 7 Mixture Control Valve 80T: Sirius 7
3.3 out of 5 Customer Rating
Mixture Control Valve 80T: Sirius 7
$6.33 Price reduced from $21.12 to
Clearance Sale! ⓘ
O-Ring Small: 120Surpass O-Ring Small: 120Surpass
3.9 out of 5 Customer Rating
O-Ring Small: 120Surpass
$6.49
Piston Pin Retainer P: 40-46 Piston Pin Retainer P: 40-46
3.9 out of 5 Customer Rating
Piston Pin Retainer P: 40-46
$6.49
Piston Ring: GT22 Piston Ring: GT22
3.3 out of 5 Customer Rating
Piston Ring: GT22
$25.44
Reed Valve Assembly: GT33 Reed Valve Assembly: GT33
5 out of 5 Customer Rating
Reed Valve Assembly: GT33
$26.99
Reduction Gear: FR5 Reduction Gear: FR5
5 out of 5 Customer Rating
Reduction Gear: FR5
$24.59 Price reduced from $81.96 to
Clearance Sale! ⓘ
Rocker Arm Retainer: FS-20-240 Rocker Arm Retainer: FS-20-240
4.7 out of 5 Customer Rating
Rocker Arm Retainer: FS-20-240
$6.49
Camshaft Cover Camshaft Cover
4.7 out of 5 Customer Rating
Camshaft Cover
$11.80
Screw Set (8): 15LA Screw Set (8): 15LA
3.9 out of 5 Customer Rating
Screw Set (8): 15LA
$8.46
Valve Throttle WLA-2: GT55 Valve Throttle WLA-2: GT55
4.1 out of 5 Customer Rating
Valve Throttle WLA-2: GT55
$15.76
Throttle Lever: #20C Throttle Lever: #20C
5 out of 5 Customer Rating
Throttle Lever: #20C
$7.49
Thrust Washer: 21-32 Thrust Washer: 21-32
3.3 out of 5 Customer Rating
Thrust Washer: 21-32
$6.49
Lock Washer 5mm Lock Washer 5mm
5 out of 5 Customer Rating
Lock Washer 5mm
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
Motor Mount: OMA-28 Series Motor Mount: OMA-28 Series
3.9 out of 5 Customer Rating
Motor Mount: OMA-28 Series
$8.99
Carburetor 60PS: FS-95V Carburetor 60PS: FS-95V
4.5 out of 5 Customer Rating
Carburetor 60PS: FS-95V
$119.97
Motor Mount: 46, 55AX Motor Mount: 46, 55AX
3.3 out of 5 Customer Rating
Motor Mount: 46, 55AX
$34.86
Silencer Set: F6040, GF40 Silencer Set: F6040, GF40
5 out of 5 Customer Rating
Silencer Set: F6040, GF40
$97.82
Silencer: F-4020, 56FS Silencer: F-4020, 56FS
5 out of 5 Customer Rating
Silencer: F-4020, 56FS
$48.51
Camshaft Gear: FR5-300 Camshaft Gear: FR5-300
3.7 out of 5 Customer Rating
Camshaft Gear: FR5-300
$44.13
Carburetor Body: 75AX Carburetor Body: 75AX
5 out of 5 Customer Rating
Carburetor Body: 75AX
$14.55 Price reduced from $48.51 to
Clearance Sale! ⓘ
Carburetor Insert: 80T, Sirius 7 Carburetor Insert: 80T, Sirius 7
3.3 out of 5 Customer Rating
Carburetor Insert: 80T, Sirius 7
$4.15 Price reduced from $13.83 to
Clearance Sale! ⓘ
Connecting Rod: FS-95V Connecting Rod: FS-95V
5 out of 5 Customer Rating
Connecting Rod: FS-95V
$9.13 Price reduced from $30.44 to
Clearance Sale! ⓘ
Cover Plate Assembly: 15LA Cover Plate Assembly: 15LA
4.1 out of 5 Customer Rating
Cover Plate Assembly: 15LA
$17.03
Starting Shaft: 18TM Starting Shaft: 18TM
3.9 out of 5 Customer Rating
Starting Shaft: 18TM
$17.01
Inner Head O.S.Speed B21 Adam Drake II Inner Head O.S.Speed B21 Adam Drake II
3.7 out of 5 Customer Rating
Inner Head O.S.Speed B21 Adam Drake II
$57.75
Thrust Plate: O.S. Speed B2104 Thrust Plate: O.S. Speed B2104
5 out of 5 Customer Rating
Thrust Plate: O.S. Speed B2104
$9.53
Carburetor Body: 22B, 21XR-B Carburetor Body: 22B, 21XR-B
4.1 out of 5 Customer Rating
Carburetor Body: 22B, 21XR-B
$18.95 Price reduced from $63.18 to
Clearance Sale! ⓘ
Crankcase: 30VG Crankcase: 30VG
4.5 out of 5 Customer Rating
Crankcase: 30VG
$26.21 Price reduced from $87.39 to
Clearance Sale! ⓘ
Outer Head: B2101 Speed Outer Head: B2101 Speed
3.3 out of 5 Customer Rating
Outer Head: B2101 Speed
$108.03
Mixture Control Valve: 12F2 Mixture Control Valve: 12F2
5 out of 5 Customer Rating
Mixture Control Valve: 12F2
$5.15 Price reduced from $17.16 to
Clearance Sale! ⓘ
55HZ-R DRS Ringed .55 Helicopter Engine 55HZ-R DRS Ringed .55 Helicopter Engine
5 out of 5 Customer Rating
55HZ-R DRS Ringed .55 Helicopter Engine
$510.44
101/102 Elements (6) 101/102 Elements (6)
4.1 out of 5 Customer Rating
101/102 Elements (6)
$13.83
T-2090SC Tune Pipe: 21XZ-B, 21VZ-B, 25XZ, 30VG T-2090SC Tune Pipe: 21XZ-B, 21VZ-B, 25XZ, 30VG
3.3 out of 5 Customer Rating
T-2090SC Tune Pipe: 21XZ-B, 21VZ-B, 25XZ, 30VG
$173.43
O.S. Carburetor Body 12F5(B) Speed T1203 O.S. Carburetor Body 12F5(B) Speed T1203
3.7 out of 5 Customer Rating
O.S. Carburetor Body 12F5(B) Speed T1203
$47.99
Connecting Rod with Retainers: Speed T1201 Connecting Rod with Retainers: Speed T1201
4.1 out of 5 Customer Rating
Connecting Rod with Retainers: Speed T1201
$44.17
Crankcase: B2102 Speed Crankcase: B2102 Speed
4.9 out of 5 Customer Rating
Crankcase: B2102 Speed
$147.19
Built-up Parts Set for Cylinder & Piston: O.S. Speed R2104 Built-up Parts Set for Cylinder & Piston: O.S. Speed R2104
5 out of 5 Customer Rating
Built-up Parts Set for Cylinder & Piston: O.S. Speed R2104
$309.38
Heat Sink Head: 18CV-R Heat Sink Head: 18CV-R
4.5 out of 5 Customer Rating
Heat Sink Head: 18CV-R
$91.50
Radial Mount Set: GF30, GF30II Radial Mount Set: GF30, GF30II
4.2 out of 5 Customer Rating
Radial Mount Set: GF30, GF30II
$99.99
Carburetor #70N: FS120SII Carburetor #70N: FS120SII
4 out of 5 Customer Rating
Carburetor #70N: FS120SII
$141.93
Cylinder Head Fixing Screws: 21TM Cylinder Head Fixing Screws: 21TM
4.8 out of 5 Customer Rating
Cylinder Head Fixing Screws: 21TM
$9.85
Cam Assembly Screw Set: SIrius 7 Cam Assembly Screw Set: SIrius 7
4.8 out of 5 Customer Rating
Cam Assembly Screw Set: SIrius 7
$4.72 Price reduced from $15.76 to
Clearance Sale! ⓘ
Choke Arm Assembly: WLA-2, GT55 Choke Arm Assembly: WLA-2, GT55
5 out of 5 Customer Rating
Choke Arm Assembly: WLA-2, GT55
$7.46
Back Plate: 40-46 LA Back Plate: 40-46 LA
5 out of 5 Customer Rating
Back Plate: 40-46 LA
$11.80
Crankcase: FT-160 Crankcase: FT-160
5 out of 5 Customer Rating
Crankcase: FT-160
$174.34
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