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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289-336 of 1,758 Results
Intake Pipe Assembly: FS-91-P Intake Pipe Assembly: FS-91-P
3.3 out of 5 Customer Rating
Intake Pipe Assembly: FS-91-P
$29.49
Throttle Stop Screw #40D Throttle Stop Screw #40D
5 out of 5 Customer Rating
Throttle Stop Screw #40D
$6.49
Carburetor Rotor: #60K Carburetor Rotor: #60K
5 out of 5 Customer Rating
Carburetor Rotor: #60K
$10.49 Price reduced from $34.99 to
Clearance Sale! ⓘ
Carburetor Rotor: #40E Carburetor Rotor: #40E
3.3 out of 5 Customer Rating
Carburetor Rotor: #40E
$22.99
Carburetor Rotor: 70T, GF30 Carburetor Rotor: 70T, GF30
4.7 out of 5 Customer Rating
Carburetor Rotor: 70T, GF30
$18.94 Price reduced from $63.12 to
Clearance Sale! ⓘ
Cover Plate: B2101 Speed Cover Plate: B2101 Speed
3.7 out of 5 Customer Rating
Cover Plate: B2101 Speed
$25.44
Crankcase: B2101 Speed Crankcase: B2101 Speed
5 out of 5 Customer Rating
Crankcase: B2101 Speed
$152.45
O.S. Outer Head Speed B2103 Type R O.S. Outer Head Speed B2103 Type R
5 out of 5 Customer Rating
O.S. Outer Head Speed B2103 Type R
$30.74 Price reduced from $102.47 to
Clearance Sale! ⓘ
Carburetor Body: 21JN Carburetor Body: 21JN
3.7 out of 5 Customer Rating
Carburetor Body: 21JN
$79.99
Crankcase: 25LA Natural Crankcase: 25LA Natural
5 out of 5 Customer Rating
Crankcase: 25LA Natural
$34.86
Crankshaft: Recoil 30VG Crankshaft: Recoil 30VG
4.1 out of 5 Customer Rating
Crankshaft: Recoil 30VG
$66.04
Mixture Control Screw: 120 Surpass Mixture Control Screw: 120 Surpass
5 out of 5 Customer Rating
Mixture Control Screw: 120 Surpass
$2.10 Price reduced from $6.49 to
Clearance Sale! ⓘ
Needle High Speed WLA-2: GT55 Needle High Speed WLA-2: GT55
3.1 out of 5 Customer Rating
Needle High Speed WLA-2: GT55
$15.99
Metering Needle Assembly: 21VZB (P) V-Spec 21C Metering Needle Assembly: 21VZB (P) V-Spec 21C
5 out of 5 Customer Rating
Metering Needle Assembly: 21VZB (P) V-Spec 21C
$19.14
Cam Follower: 200 Surpass Cam Follower: 200 Surpass
3.3 out of 5 Customer Rating
Cam Follower: 200 Surpass
$22.26
Carburetor Body: 40K, 46AXII Carburetor Body: 40K, 46AXII
4.5 out of 5 Customer Rating
Carburetor Body: 40K, 46AXII
$48.41
Carburetor Rotor: 61H, GT15 Carburetor Rotor: 61H, GT15
4.1 out of 5 Customer Rating
Carburetor Rotor: 61H, GT15
$7.87 Price reduced from $26.24 to
Clearance Sale! ⓘ
Carburetor Rotor: 61HB Carburetor Rotor: 61HB
4.7 out of 5 Customer Rating
Carburetor Rotor: 61HB
$26.24
Choke Shaft: WLA-2, GT55 Choke Shaft: WLA-2, GT55
3.9 out of 5 Customer Rating
Choke Shaft: WLA-2, GT55
$7.79 Price reduced from $25.99 to
Clearance Sale! ⓘ
Connecting Rod: GT33 Connecting Rod: GT33
5 out of 5 Customer Rating
Connecting Rod: GT33
$67.42
Crankcase: 75AX Crankcase: 75AX
3.3 out of 5 Customer Rating
Crankcase: 75AX
$35.93 Price reduced from $119.78 to
Clearance Sale! ⓘ
Crankshaft: 50SX-H Crankshaft: 50SX-H
4.1 out of 5 Customer Rating
Crankshaft: 50SX-H
$55.12
Cylinder Liner: FS-40 Cylinder Liner: FS-40
4.1 out of 5 Customer Rating
Cylinder Liner: FS-40
$25.94
Drive Washer: 91FX Drive Washer: 91FX
5 out of 5 Customer Rating
Drive Washer: 91FX
$16.09
Fuel Inlet: #61B, 91HZ Fuel Inlet: #61B, 91HZ
3.5 out of 5 Customer Rating
Fuel Inlet: #61B, 91HZ
$11.80
Intake Manifold Assembly: FS-91 Surpass II Intake Manifold Assembly: FS-91 Surpass II
5 out of 5 Customer Rating
Intake Manifold Assembly: FS-91 Surpass II
$29.49
Pushrod Cover Assembly: FS72 Alpha Pushrod Cover Assembly: FS72 Alpha
5 out of 5 Customer Rating
Pushrod Cover Assembly: FS72 Alpha
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
Piston Pin; FS-62V Piston Pin; FS-62V
4.7 out of 5 Customer Rating
Piston Pin; FS-62V
$3.57 Price reduced from $11.91 to
Clearance Sale! ⓘ
Rotor Stop #3A #2A Rotor Stop #3A #2A
5 out of 5 Customer Rating
Rotor Stop #3A #2A
$6.49
Standoff 5x25.4mm 1" (4): GT55 Standoff 5x25.4mm 1" (4): GT55
4.3 out of 5 Customer Rating
Standoff 5x25.4mm 1" (4): GT55
$36.85
Crankshaft: 15CV-A Crankshaft: 15CV-A
4.7 out of 5 Customer Rating
Crankshaft: 15CV-A
$30.89
Cylinder Liner: FS-95V Cylinder Liner: FS-95V
4.1 out of 5 Customer Rating
Cylinder Liner: FS-95V
$45.01
Gasket Exhaust: GT55 Gasket Exhaust: GT55
5 out of 5 Customer Rating
Gasket Exhaust: GT55
$7.46
Silencer Body Gasket: 200 Surpass Silencer Body Gasket: 200 Surpass
3.3 out of 5 Customer Rating
Silencer Body Gasket: 200 Surpass
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Piston: 200 Surpass Piston: 200 Surpass
5 out of 5 Customer Rating
Piston: 200 Surpass
$57.96
Valve Spring Retainer: FS-70SII Valve Spring Retainer: FS-70SII
3.3 out of 5 Customer Rating
Valve Spring Retainer: FS-70SII
$6.49
Motor Mount: FT120, FT160 Motor Mount: FT120, FT160
3.7 out of 5 Customer Rating
Motor Mount: FT120, FT160
$44.13
Front Ball Bearing: 40, 46, 48 Front Ball Bearing: 40, 46, 48
3.7 out of 5 Customer Rating
Front Ball Bearing: 40, 46, 48
$21.17
Speed Hex Wrench Ball Driver 2.0mm Speed Hex Wrench Ball Driver 2.0mm
3.3 out of 5 Customer Rating
Speed Hex Wrench Ball Driver 2.0mm
$36.84
Carburetor Reducer 7mm, Red: Speed 21 V-Spec Carburetor Reducer 7mm, Red: Speed 21 V-Spec
5 out of 5 Customer Rating
Carburetor Reducer 7mm, Red: Speed 21 V-Spec
$21.10
Cover Plate: 105HX-R Cover Plate: 105HX-R
5 out of 5 Customer Rating
Cover Plate: 105HX-R
$28.45
Inner Cylinder Head: 12XZ Inner Cylinder Head: 12XZ
4.1 out of 5 Customer Rating
Inner Cylinder Head: 12XZ
$32.56
Slide Valve #21JS Slide Valve #21JS
3.9 out of 5 Customer Rating
Slide Valve #21JS
$32.56
Crankshaft: O.S. Speed B2104 Crankshaft: O.S. Speed B2104
5 out of 5 Customer Rating
Crankshaft: O.S. Speed B2104
$237.99
Cylinder & Piston: 21XZ-GT Speed Cylinder & Piston: 21XZ-GT Speed
4.1 out of 5 Customer Rating
Cylinder & Piston: 21XZ-GT Speed
$177.63
Needle Holder #20E Needle Holder #20E
3.7 out of 5 Customer Rating
Needle Holder #20E
$16.09
Radial Mount: 72FS-a Radial Mount: 72FS-a
4.8 out of 5 Customer Rating
Radial Mount: 72FS-a
$44.34
Cylinder Head: 91SX-H Complete Cylinder Head: 91SX-H Complete
4.4 out of 5 Customer Rating
Cylinder Head: 91SX-H Complete
$30.00 Price reduced from $99.99 to
Clearance Sale! ⓘ
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