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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817-864 of 1,758 Results
Pump Unit PD-08: FS-200S-P Pump Unit PD-08: FS-200S-P
5 out of 5 Customer Rating
$87.29
Piston Ring: 91FX Piston Ring: 91FX
4.4 out of 5 Customer Rating
$26.24
Motor Mount: 15LA Motor Mount: 15LA
4.1 out of 5 Customer Rating
$22.26
O.S. Cylinder Piston Rod Set Speed B2103 Type R O.S. Cylinder Piston Rod Set Speed B2103 Type R
5 out of 5 Customer Rating
$72.89 Price reduced from $242.95 to
Clearance Sale!
Carburetor Reducer 7mm, Yellow: 21XZ-B Carburetor Reducer 7mm, Yellow: 21XZ-B
3.6 out of 5 Customer Rating
$3.54 Price reduced from $11.80 to
Clearance Sale!
Motor Mount: 140RX, FS120, 120AX, FS200S Motor Mount: 140RX, FS120, 120AX, FS200S
3.3 out of 5 Customer Rating
$77.99
90 Degree Muffler Extension: 120AX 90 Degree Muffler Extension: 120AX
4.3 out of 5 Customer Rating
$34.86
High Pressure Check Valve: 91HZ-R High Pressure Check Valve: 91HZ-R
5 out of 5 Customer Rating
$21.10
Exhaust Seal O-Ring (2) Exhaust Seal O-Ring (2)
4.7 out of 5 Customer Rating
$13.78
Connecting Rod: Speed B2101, B2102 Connecting Rod: Speed B2101, B2102
4 out of 5 Customer Rating
$52.58
Piston: GF40 Piston: GF40
3.9 out of 5 Customer Rating
$20.48 Price reduced from $68.27 to
Clearance Sale!
Spinner Nut: 60-91 Spinner Nut: 60-91
5 out of 5 Customer Rating
$15.78
Cylinder Piston Assembly: 21XZ-B Spec 2 Cylinder Piston Assembly: 21XZ-B Spec 2
4 out of 5 Customer Rating
$61.31 Price reduced from $204.38 to
Clearance Sale!
Cylinder Liner: 91FX Cylinder Liner: 91FX
4.8 out of 5 Customer Rating
$26.68 Price reduced from $88.92 to
Clearance Sale!
Cylinder Piston Rod Set: O.S. Speed B2104 Cylinder Piston Rod Set: O.S. Speed B2104
3.4 out of 5 Customer Rating
$242.95
Outer Head: O.S. Speed B21 Pink Rhonda Drake Edition Outer Head: O.S. Speed B21 Pink Rhonda Drake Edition
4.6 out of 5 Customer Rating
$33.38 Price reduced from $111.25 to
Clearance Sale!
Intake Manifold: GF30 Intake Manifold: GF30
3.9 out of 5 Customer Rating
$10.46 Price reduced from $34.86 to
Clearance Sale!
Outer Head: Speed 21XZ-B Spec III Outer Head: Speed 21XZ-B Spec III
5 out of 5 Customer Rating
$30.76 Price reduced from $102.52 to
Clearance Sale!
Pushrod: GF40 Pushrod: GF40
5 out of 5 Customer Rating
$8.90 Price reduced from $29.68 to
Clearance Sale!
Cover Plate: 15CV-A Cover Plate: 15CV-A
5 out of 5 Customer Rating
$10.99
O-Ring Small: 120Surpass O-Ring Small: 120Surpass
3.9 out of 5 Customer Rating
$6.49
Reed Valve Assembly: GT33 Reed Valve Assembly: GT33
5 out of 5 Customer Rating
$26.99
Rocker Arm Retainer: FS-20-240 Rocker Arm Retainer: FS-20-240
4.7 out of 5 Customer Rating
$6.49
Screw Set (8): 15LA Screw Set (8): 15LA
3.9 out of 5 Customer Rating
$8.46
Valve Throttle WLA-2: GT55 Valve Throttle WLA-2: GT55
4.1 out of 5 Customer Rating
$15.76
Throttle Lever: #20C Throttle Lever: #20C
5 out of 5 Customer Rating
$7.49
Thrust Washer: 21-32 Thrust Washer: 21-32
3.3 out of 5 Customer Rating
$6.49
Motor Mount: OMA-28 Series Motor Mount: OMA-28 Series
3.9 out of 5 Customer Rating
$8.99
Carburetor 60PS: FS-95V Carburetor 60PS: FS-95V
4.5 out of 5 Customer Rating
$119.97
Motor Mount: 46, 55AX Motor Mount: 46, 55AX
3.3 out of 5 Customer Rating
$34.86
Locknut Set: FS-120 Surpass Locknut Set: FS-120 Surpass
5 out of 5 Customer Rating
$26.24
Silencer Set: F6040, GF40 Silencer Set: F6040, GF40
5 out of 5 Customer Rating
$97.82
Silencer: F-4020, 56FS Silencer: F-4020, 56FS
5 out of 5 Customer Rating
$48.51
Camshaft Gear: FR5-300 Camshaft Gear: FR5-300
3.7 out of 5 Customer Rating
$44.13
Connecting Rod: FS-95V Connecting Rod: FS-95V
5 out of 5 Customer Rating
$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
$17.03
Starting Shaft: 18TM Starting Shaft: 18TM
3.9 out of 5 Customer Rating
$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
$57.75
Thrust Plate: O.S. Speed B2104 Thrust Plate: O.S. Speed B2104
5 out of 5 Customer Rating
$9.53
Crankcase: 30VG Crankcase: 30VG
4.5 out of 5 Customer Rating
$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
$108.03
Mixture Control Valve: 12F2 Mixture Control Valve: 12F2
5 out of 5 Customer Rating
$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
$510.44
101/102 Elements (6) 101/102 Elements (6)
4.1 out of 5 Customer Rating
$13.83
P4 Turbo Plug Super Hot Off-Road P4 Turbo Plug Super Hot Off-Road
4.7 out of 5 Customer Rating
$14.99
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
$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
$47.99
Connecting Rod with Retainers: Speed T1201 Connecting Rod with Retainers: Speed T1201
4.1 out of 5 Customer Rating
$44.17