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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1,566-1,613 of 1,758 Results
Thrust Washer: FT-120 160 Thrust Washer: FT-120 160
5 out of 5 Customer Rating
Thrust Washer: FT-120 160
$6.49
Bearing R-1560X2ZZ Bearing R-1560X2ZZ
4 out of 5 Customer Rating
Bearing R-1560X2ZZ
$17.99
Prop Shaft: OMA-38 Series Prop Shaft: OMA-38 Series
5 out of 5 Customer Rating
Prop Shaft: OMA-38 Series
$27.99
Carburetor Rotor 70T2: GF30 II Carburetor Rotor 70T2: GF30 II
4 out of 5 Customer Rating
Carburetor Rotor 70T2: GF30 II
$63.12
Extension Adapter E-4011 Extension Adapter E-4011
5 out of 5 Customer Rating
Extension Adapter E-4011
$10.42 Price reduced from $34.76 to
Clearance Sale! ⓘ
Muffler #892: 25SF Muffler #892: 25SF
4 out of 5 Customer Rating
Muffler #892: 25SF
$15.09 Price reduced from $29.49 to
Clearance Sale! ⓘ
Carburetor Rotor: 56 FS Carburetor Rotor: 56 FS
4.4 out of 5 Customer Rating
Carburetor Rotor: 56 FS
$8.88 Price reduced from $29.60 to
Clearance Sale! ⓘ
Crankshaft: 20-25FP Crankshaft: 20-25FP
5 out of 5 Customer Rating
Crankshaft: 20-25FP
$28.59
Cylinder Liner: FS-70 Surpass Cylinder Liner: FS-70 Surpass
4.4 out of 5 Customer Rating
Cylinder Liner: FS-70 Surpass
$35.48
Manifold Seal: FT-120-300 Manifold Seal: FT-120-300
3.6 out of 5 Customer Rating
Manifold Seal: FT-120-300
$11.84
Manifold Nut M9 Manifold Nut M9
3.6 out of 5 Customer Rating
Manifold Nut M9
$6.49
Needle Valve Assembly: #60B Needle Valve Assembly: #60B
3.6 out of 5 Customer Rating
Needle Valve Assembly: #60B
$22.30
Mid Needle Valve Assebly: 61ER, 941HZ-R Mid Needle Valve Assebly: 61ER, 941HZ-R
3.6 out of 5 Customer Rating
Mid Needle Valve Assebly: 61ER, 941HZ-R
$22.30
Piston: FS-40 Surpass Piston: FS-40 Surpass
5 out of 5 Customer Rating
Piston: FS-40 Surpass
$25.29
Piston Pin Retainer: 61RX SX Piston Pin Retainer: 61RX SX
3.2 out of 5 Customer Rating
Piston Pin Retainer: 61RX SX
$6.45
Rotor Stop Holder #2K 74 Rotor Stop Holder #2K 74
3.2 out of 5 Customer Rating
Rotor Stop Holder #2K 74
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Cap Screw 5x25mm (10): GT55 Cap Screw 5x25mm (10): GT55
5 out of 5 Customer Rating
Cap Screw 5x25mm (10): GT55
$13.78
Standoff 5x50.8mm 2" (4): GT55 Standoff 5x50.8mm 2" (4): GT55
5 out of 5 Customer Rating
Standoff 5x50.8mm 2" (4): GT55
$48.51
Stator Assembly: 5020-490 .40 Stator Assembly: 5020-490 .40
3.6 out of 5 Customer Rating
Stator Assembly: 5020-490 .40
$27.90 Price reduced from $92.99 to
Clearance Sale! ⓘ
Inner Head O-Ring O.S. T1204 (S30-FKM) Inner Head O-Ring O.S. T1204 (S30-FKM)
5 out of 5 Customer Rating
Inner Head O-Ring O.S. T1204 (S30-FKM)
$9.89
Carburetor 21M2-B: Speed R2101 Carburetor 21M2-B: Speed R2101
3.4 out of 5 Customer Rating
Carburetor 21M2-B: Speed R2101
$152.36
Carburetor Body: #21C Carburetor Body: #21C
5 out of 5 Customer Rating
Carburetor Body: #21C
$24.00 Price reduced from $79.99 to
Clearance Sale! ⓘ
Crankcase: R21 Crankcase: R21
4 out of 5 Customer Rating
Crankcase: R21
$136.57
Crankshaft: 12XZ Speed Spec II Crankshaft: 12XZ Speed Spec II
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed Spec II
$35.99 Price reduced from $119.97 to
Clearance Sale! ⓘ
RP8 Turbo Glow Plug, On-Road, Cold RP8 Turbo Glow Plug, On-Road, Cold
4.8 out of 5 Customer Rating
RP8 Turbo Glow Plug, On-Road, Cold
$15.99
M1006SC Manifold M1006SC Manifold
3.6 out of 5 Customer Rating
M1006SC Manifold
$21.48 Price reduced from $71.60 to
Clearance Sale! ⓘ
TR02 Tuned Silencer EFRA2165 TR02 Tuned Silencer EFRA2165
5 out of 5 Customer Rating
TR02 Tuned Silencer EFRA2165
$55.45 Price reduced from $184.82 to
Clearance Sale! ⓘ
Rear Bearing: 12TR Rear Bearing: 12TR
5 out of 5 Customer Rating
Rear Bearing: 12TR
$61.99
O.S. Pistion Pin: .12XZ O.S. Pistion Pin: .12XZ
4.8 out of 5 Customer Rating
O.S. Pistion Pin: .12XZ
$8.99
Crankshaft: 21XZ-B Speed Crankshaft: 21XZ-B Speed
5 out of 5 Customer Rating
Crankshaft: 21XZ-B Speed
$52.49 Price reduced from $174.99 to
Clearance Sale! ⓘ
Cylinder & Piston Assembly: 21TM Cylinder & Piston Assembly: 21TM
5 out of 5 Customer Rating
Cylinder & Piston Assembly: 21TM
$122.17
Inner Head: 12XZ Speed Spec 3 Inner Head: 12XZ Speed Spec 3
5 out of 5 Customer Rating
Inner Head: 12XZ Speed Spec 3
$9.59 Price reduced from $31.99 to
Clearance Sale! ⓘ
Outer Head: Speed 21 V-Spec Outer Head: Speed 21 V-Spec
3.4 out of 5 Customer Rating
Outer Head: Speed 21 V-Spec
$42.00 Price reduced from $139.99 to
Clearance Sale! ⓘ
Exhaust Gasket: 21RZ Exhaust Gasket: 21RZ
4.4 out of 5 Customer Rating
Exhaust Gasket: 21RZ
$13.78
Mixture Control Valve #10A Mixture Control Valve #10A
3.6 out of 5 Customer Rating
Mixture Control Valve #10A
$13.67
O.S. Metering Needle Assembly 22D Speed B2103 O.S. Metering Needle Assembly 22D Speed B2103
3.4 out of 5 Customer Rating
O.S. Metering Needle Assembly 22D Speed B2103
$19.14
Metering Needle Assembly 22C(B): Speed B2102 Metering Needle Assembly 22C(B): Speed B2102
5 out of 5 Customer Rating
Metering Needle Assembly 22C(B): Speed B2102
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
Carburetor #21L: 25AX Carburetor #21L: 25AX
5 out of 5 Customer Rating
Carburetor #21L: 25AX
$29.34 Price reduced from $97.81 to
Clearance Sale! ⓘ
Carburetor 80T: Sirius 7 Carburetor 80T: Sirius 7
4.1 out of 5 Customer Rating
Carburetor 80T: Sirius 7
$52.52 Price reduced from $125.08 to
Clearance Sale! ⓘ
E4050 In-Cowl Muffler: 65AX E4050 In-Cowl Muffler: 65AX
5 out of 5 Customer Rating
E4050 In-Cowl Muffler: 65AX
$67.33
Camshaft Bearing: F 120-300 Camshaft Bearing: F 120-300
4.5 out of 5 Customer Rating
Camshaft Bearing: F 120-300
$22.37
Crankcase: GF30 Crankcase: GF30
5 out of 5 Customer Rating
Crankcase: GF30
$48.89 Price reduced from $162.95 to
Clearance Sale! ⓘ
Cylinder & Piston: 65AX Cylinder & Piston: 65AX
3.3 out of 5 Customer Rating
Cylinder & Piston: 65AX
$138.26
Exhaust Pipe Nut: F40-300 Exhaust Pipe Nut: F40-300
3.9 out of 5 Customer Rating
Exhaust Pipe Nut: F40-300
$6.49
Gasket Set: 46AX Gasket Set: 46AX
3.1 out of 5 Customer Rating
Gasket Set: 46AX
$11.80
Cover Plate Gasket: 35AX Cover Plate Gasket: 35AX
3.7 out of 5 Customer Rating
Cover Plate Gasket: 35AX
$10.94
Piston Pin Retainer: 40PS Piston Pin Retainer: 40PS
5 out of 5 Customer Rating
Piston Pin Retainer: 40PS
$6.49
Piston Pin: 55HZ Hyper Piston Pin: 55HZ Hyper
4.7 out of 5 Customer Rating
Piston Pin: 55HZ Hyper
$10.94
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