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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721-768 of 1,758 Results
Cylinder & Piston: 65AX Cylinder & Piston: 65AX
3.3 out of 5 Customer Rating
Cylinder & Piston: 65AX
$138.26
Cylinder Head with Valve: FS-40 Surpass Cylinder Head with Valve: FS-40 Surpass
5 out of 5 Customer Rating
Cylinder Head with Valve: FS-40 Surpass
$87.39
Cylinder Head: GT33 Cylinder Head: GT33
3.3 out of 5 Customer Rating
Cylinder Head: GT33
$57.78
Gasket Carb IP: #10, FR5 Gasket Carb IP: #10, FR5
4.5 out of 5 Customer Rating
Gasket Carb IP: #10, FR5
$6.49
Gasket Set: FS-91-P Gasket Set: FS-91-P
5 out of 5 Customer Rating
Gasket Set: FS-91-P
$10.94
Cover Plate Gasket: 35AX Cover Plate Gasket: 35AX
3.7 out of 5 Customer Rating
Cover Plate Gasket: 35AX
$10.94
Gasket Carburetor: 120-240 Gasket Carburetor: 120-240
5 out of 5 Customer Rating
Gasket Carburetor: 120-240
$6.49
Needle Adj Screw New: #60B Needle Adj Screw New: #60B
3.3 out of 5 Customer Rating
Needle Adj Screw New: #60B
$7.57
Piston Pin: FS-120 Piston Pin: FS-120
3.9 out of 5 Customer Rating
Piston Pin: FS-120
$14.73
Pushrod: FS-62V Pushrod: FS-62V
5 out of 5 Customer Rating
Pushrod: FS-62V
$11.99
Needle Assembly Screw: 65LA Needle Assembly Screw: 65LA
5 out of 5 Customer Rating
Needle Assembly Screw: 65LA
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Dust Cap Set, 10mm (3) Dust Cap Set, 10mm (3)
4.4 out of 5 Customer Rating
Dust Cap Set, 10mm (3)
$2.96 Price reduced from $9.85 to
Clearance Sale! ⓘ
Cover Plate: O.S. Speed B2104 Cover Plate: O.S. Speed B2104
4.2 out of 5 Customer Rating
Cover Plate: O.S. Speed B2104
$10.50 Price reduced from $28.35 to
Clearance Sale! ⓘ
Cylinder Rebuild Kit: R2101 Speed Cylinder Rebuild Kit: R2101 Speed
5 out of 5 Customer Rating
Cylinder Rebuild Kit: R2101 Speed
$232.21
Cylinder & Piston Speed: T1202 Cylinder & Piston Speed: T1202
4 out of 5 Customer Rating
Cylinder & Piston Speed: T1202
$127.43
Outer Head: 19XZ-B Speed Outer Head: 19XZ-B Speed
5 out of 5 Customer Rating
Outer Head: 19XZ-B Speed
$102.20
Inner Head: 21XZ-B Spec 2 Inner Head: 21XZ-B Spec 2
4.8 out of 5 Customer Rating
Inner Head: 21XZ-B Spec 2
$57.96
Gasket Head Aluminum, .2mm: 19XZ-B Speed Gasket Head Aluminum, .2mm: 19XZ-B Speed
5 out of 5 Customer Rating
Gasket Head Aluminum, .2mm: 19XZ-B Speed
$5.31
Slide Valve 21M Slide Valve 21M
5 out of 5 Customer Rating
Slide Valve 21M
$9.77 Price reduced from $32.56 to
Clearance Sale! ⓘ
Bearing Rear: 65AX Bearing Rear: 65AX
5 out of 5 Customer Rating
Bearing Rear: 65AX
$22.16
Rear Bearing: 108-160 Rear Bearing: 108-160
4.9 out of 5 Customer Rating
Rear Bearing: 108-160
$26.34
Cam Holder: Sirius 7 Cam Holder: Sirius 7
5 out of 5 Customer Rating
Cam Holder: Sirius 7
$48.41
Connecting Rod Plate: GGT10 Connecting Rod Plate: GGT10
3.1 out of 5 Customer Rating
Connecting Rod Plate: GGT10
$6.68 Price reduced from $22.26 to
Clearance Sale! ⓘ
Cover Plate: 56 FS Cover Plate: 56 FS
3.7 out of 5 Customer Rating
Cover Plate: 56 FS
$15.76
Cover Plate: 91SZ-H Cover Plate: 91SZ-H
5 out of 5 Customer Rating
Cover Plate: 91SZ-H
$20.99
Crankshaft: 25AX Crankshaft: 25AX
3.3 out of 5 Customer Rating
Crankshaft: 25AX
$43.99
Cylinder Head: FS81 Alpha Cylinder Head: FS81 Alpha
5 out of 5 Customer Rating
Cylinder Head: FS81 Alpha
$76.86
Cylinder Liner: 140RX Cylinder Liner: 140RX
5 out of 5 Customer Rating
Cylinder Liner: 140RX
$31.80 Price reduced from $106.01 to
Clearance Sale! ⓘ
Drive Hub: 140RX Drive Hub: 140RX
5 out of 5 Customer Rating
Drive Hub: 140RX
$26.24
Drive Spacer: GT60 Drive Spacer: GT60
5 out of 5 Customer Rating
Drive Spacer: GT60
$38.03
Intake Cam: Sirius 7 Intake Cam: Sirius 7
5 out of 5 Customer Rating
Intake Cam: Sirius 7
$21.11 Price reduced from $70.37 to
Clearance Sale! ⓘ
Muffler Assembly Screw: 75AX Muffler Assembly Screw: 75AX
5 out of 5 Customer Rating
Muffler Assembly Screw: 75AX
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Needle Assembly: FT-120-300 Needle Assembly: FT-120-300
3.9 out of 5 Customer Rating
Needle Assembly: FT-120-300
$19.05
Needle Valve Assembly: #61B, 91HZ Needle Valve Assembly: #61B, 91HZ
4.1 out of 5 Customer Rating
Needle Valve Assembly: #61B, 91HZ
$22.30
O-Ring: GF30 O-Ring: GF30
4.7 out of 5 Customer Rating
O-Ring: GF30
$8.43
Piston: GF30 Piston: GF30
4.7 out of 5 Customer Rating
Piston: GF30
$17.36 Price reduced from $57.86 to
Clearance Sale! ⓘ
Piston Pin: 25F FP Piston Pin: 25F FP
3.3 out of 5 Customer Rating
Piston Pin: 25F FP
$9.85
Piston Pin: 15LA CV LD Piston Pin: 15LA CV LD
5 out of 5 Customer Rating
Piston Pin: 15LA CV LD
$8.49
Piston Ring: BGX-3500 Piston Ring: BGX-3500
3.3 out of 5 Customer Rating
Piston Ring: BGX-3500
$37.80
Tappet Adjusting Screw: 200 Surpass Tappet Adjusting Screw: 200 Surpass
4.3 out of 5 Customer Rating
Tappet Adjusting Screw: 200 Surpass
$9.85
Valve Assembly: New FT-160 Valve Assembly: New FT-160
5 out of 5 Customer Rating
Valve Assembly: New FT-160
$36.85
Cover Plate: GF30 Cover Plate: GF30
3.1 out of 5 Customer Rating
Cover Plate: GF30
$9.77 Price reduced from $32.56 to
Clearance Sale! ⓘ
Crankshaft Spacer: Sirius 7 Crankshaft Spacer: Sirius 7
3.3 out of 5 Customer Rating
Crankshaft Spacer: Sirius 7
$11.75
Drive Hub: 200 Surpass Drive Hub: 200 Surpass
5 out of 5 Customer Rating
Drive Hub: 200 Surpass
$29.60
Gasket Intake Manifold: GF40 Gasket Intake Manifold: GF40
5 out of 5 Customer Rating
Gasket Intake Manifold: GF40
$10.94
Idle Needle: WLA-2 GT55 Idle Needle: WLA-2 GT55
5 out of 5 Customer Rating
Idle Needle: WLA-2 GT55
$15.76
Mixture Control Valve: 200 Surpass Mixture Control Valve: 200 Surpass
3.7 out of 5 Customer Rating
Mixture Control Valve: 200 Surpass
$7.00 Price reduced from $17.16 to
Clearance Sale! ⓘ
Muffler Screws #744B Muffler Screws #744B
5 out of 5 Customer Rating
Muffler Screws #744B
$6.49
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