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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126-173 of 1,758 Results
Piston Pin: GGT10 Piston Pin: GGT10
4.4 out of 5 Customer Rating
Piston Pin: GGT10
$22.30
Propeller Washer: GT33 Propeller Washer: GT33
3.6 out of 5 Customer Rating
Propeller Washer: GT33
$8.52
Crankcase: O.S. FS-64V Crankcase: O.S. FS-64V
3.6 out of 5 Customer Rating
Crankcase: O.S. FS-64V
$69.99
Heat Sink Head: 37SZ-H Heat Sink Head: 37SZ-H
4 out of 5 Customer Rating
Heat Sink Head: 37SZ-H
$50.72
Silencer: F-6010, 200 Surpass Silencer: F-6010, 200 Surpass
4 out of 5 Customer Rating
Silencer: F-6010, 200 Surpass
$87.15
Cylinder Head: FSa-56II Cylinder Head: FSa-56II
4.8 out of 5 Customer Rating
Cylinder Head: FSa-56II
$70.43
Cap Screw 5x50mm (10): GT55 Cap Screw 5x50mm (10): GT55
5 out of 5 Customer Rating
Cap Screw 5x50mm (10): GT55
$13.78
Cap Screw 3x28mm (10) Cap Screw 3x28mm (10)
3.6 out of 5 Customer Rating
Cap Screw 3x28mm (10)
$9.85
Woodruff Key: 120-240 Woodruff Key: 120-240
4.4 out of 5 Customer Rating
Woodruff Key: 120-240
$6.45
Main Shaft: OMA3825-750W Main Shaft: OMA3825-750W
4.6 out of 5 Customer Rating
Main Shaft: OMA3825-750W
$8.49
Screw Set Speed (10): 21 V-Spec Screw Set Speed (10): 21 V-Spec
4.4 out of 5 Customer Rating
Screw Set Speed (10): 21 V-Spec
$9.99
Carburetor Washe:r #20A, B Carburetor Washe:r #20A, B
4 out of 5 Customer Rating
Carburetor Washe:r #20A, B
$6.49
Carburetor Complete 70T2: GF30 II Carburetor Complete 70T2: GF30 II
5 out of 5 Customer Rating
Carburetor Complete 70T2: GF30 II
$174.34
Intake Manifold Assembly A: IL-300 Dia Star Intake Manifold Assembly A: IL-300 Dia Star
4.1 out of 5 Customer Rating
Intake Manifold Assembly A: IL-300 Dia Star
$11.05 Price reduced from $36.85 to
Clearance Sale! ⓘ
Front Bearing: GT55 Front Bearing: GT55
3.7 out of 5 Customer Rating
Front Bearing: GT55
$30.44
Rear Bearing: 61RX, SX-H Rear Bearing: 61RX, SX-H
4.5 out of 5 Customer Rating
Rear Bearing: 61RX, SX-H
$30.44
Carburetor Body: #61B, 91HZ Carburetor Body: #61B, 91HZ
3.3 out of 5 Customer Rating
Carburetor Body: #61B, 91HZ
$22.80 Price reduced from $75.99 to
Clearance Sale! ⓘ
Carburetor Retainer: 55HZ Hyper Carburetor Retainer: 55HZ Hyper
5 out of 5 Customer Rating
Carburetor Retainer: 55HZ Hyper
$11.70
Connecting Rod: 200 Surpass Connecting Rod: 200 Surpass
5 out of 5 Customer Rating
Connecting Rod: 200 Surpass
$48.51
Cover Plate: 55HZ Hyper Cover Plate: 55HZ Hyper
4.1 out of 5 Customer Rating
Cover Plate: 55HZ Hyper
$11.72
Drive Washer: GF30 Drive Washer: GF30
3.7 out of 5 Customer Rating
Drive Washer: GF30
$11.40 Price reduced from $38.03 to
Clearance Sale! ⓘ
Cover Gasket: 200 Surpass Cover Gasket: 200 Surpass
5 out of 5 Customer Rating
Cover Gasket: 200 Surpass
$6.49
Gasket Carburetor: FS-120 Gasket Carburetor: FS-120
4.5 out of 5 Customer Rating
Gasket Carburetor: FS-120
$6.49
Gasket Carburetor: GF40 Gasket Carburetor: GF40
3.9 out of 5 Customer Rating
Gasket Carburetor: GF40
$11.91
Intake Manifold: FS155A-P Intake Manifold: FS155A-P
5 out of 5 Customer Rating
Intake Manifold: FS155A-P
$38.03
Exhaust Header Pipe Assembly: 200 Surpass Exhaust Header Pipe Assembly: 200 Surpass
5 out of 5 Customer Rating
Exhaust Header Pipe Assembly: 200 Surpass
$22.26
Muffler Extension Screws 120AX (2) Muffler Extension Screws 120AX (2)
5 out of 5 Customer Rating
Muffler Extension Screws 120AX (2)
$6.49
O-Ring P3-FKM 61H: GT15 O-Ring P3-FKM 61H: GT15
3.3 out of 5 Customer Rating
O-Ring P3-FKM 61H: GT15
$10.94
Rocker Arm: FS95V Rocker Arm: FS95V
3.7 out of 5 Customer Rating
Rocker Arm: FS95V
$28.45
Rocker Arm Shaft: Sirius 7 Rocker Arm Shaft: Sirius 7
3.3 out of 5 Customer Rating
Rocker Arm Shaft: Sirius 7
$9.44
Cap Screw 5x15mm (10): GT55 Cap Screw 5x15mm (10): GT55
4.7 out of 5 Customer Rating
Cap Screw 5x15mm (10): GT55
$13.78
Exhaust Valve Assembly: 200 Surpass Exhaust Valve Assembly: 200 Surpass
5 out of 5 Customer Rating
Exhaust Valve Assembly: 200 Surpass
$44.22
Crankcase: FS155A-P Crankcase: FS155A-P
4.5 out of 5 Customer Rating
Crankcase: FS155A-P
$174.52
Crankshaft: FS-62V Crankshaft: FS-62V
4.7 out of 5 Customer Rating
Crankshaft: FS-62V
$66.17
Cylinder Head: FSa-72II Cylinder Head: FSa-72II
3.7 out of 5 Customer Rating
Cylinder Head: FSa-72II
$29.65 Price reduced from $98.83 to
Clearance Sale! ⓘ
Cylinder Jacket: Sirius 7 Cylinder Jacket: Sirius 7
5 out of 5 Customer Rating
Cylinder Jacket: Sirius 7
$35.01 Price reduced from $97.71 to
Clearance Sale! ⓘ
Master Connecting Rod Assembly: Sirius 7 Master Connecting Rod Assembly: Sirius 7
4.1 out of 5 Customer Rating
Master Connecting Rod Assembly: Sirius 7
$87.29
Rocker Arm Assembly: FS-70 Ultimate Rocker Arm Assembly: FS-70 Ultimate
4.7 out of 5 Customer Rating
Rocker Arm Assembly: FS-70 Ultimate
$26.99
Rocker Arm Assembly: 120 300 Rocker Arm Assembly: 120 300
5 out of 5 Customer Rating
Rocker Arm Assembly: 120 300
$32.56
Rocker Arm: FS-40-48S Rocker Arm: FS-40-48S
5 out of 5 Customer Rating
Rocker Arm: FS-40-48S
$25.44
Valve Intake: FS-91 Surpass Valve Intake: FS-91 Surpass
4.7 out of 5 Customer Rating
Valve Intake: FS-91 Surpass
$34.86
Main Shaft: 3805-1200 Main Shaft: 3805-1200
3.9 out of 5 Customer Rating
Main Shaft: 3805-1200
$8.99
Air Bleed Screw: #10G Air Bleed Screw: #10G
4.5 out of 5 Customer Rating
Air Bleed Screw: #10G
$6.49
202 Elements (4) 202 Elements (4)
5 out of 5 Customer Rating
202 Elements (4)
$13.78
O.S. Carburetor Body 22D (B) Speed B2103 Type S O.S. Carburetor Body 22D (B) Speed B2103 Type S
4.1 out of 5 Customer Rating
O.S. Carburetor Body 22D (B) Speed B2103 Type S
$87.19
O.S. Crankcase OS Speed R21GT O.S. Crankcase OS Speed R21GT
4.1 out of 5 Customer Rating
O.S. Crankcase OS Speed R21GT
$185.04
Outer Head: 12XZ Speed Spec II Outer Head: 12XZ Speed Spec II
5 out of 5 Customer Rating
Outer Head: 12XZ Speed Spec II
$79.99
Screw Set (10): 21VZ-R VZB Screw Set (10): 21VZ-R VZB
4.7 out of 5 Customer Rating
Screw Set (10): 21VZ-R VZB
$9.85
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