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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558-605 of 1,758 Results
Valve: FS-62V Valve: FS-62V
3.3 out of 5 Customer Rating
Valve: FS-62V
$21.17
Motor Mount: OMA-38 Series Motor Mount: OMA-38 Series
4.1 out of 5 Customer Rating
Motor Mount: OMA-38 Series
$15.99
Crankcase: 160FX Crankcase: 160FX
5 out of 5 Customer Rating
Crankcase: 160FX
$152.36
Crankcase: 55AX Crankcase: 55AX
3.3 out of 5 Customer Rating
Crankcase: 55AX
$67.24
Crankcase: 56 FS Crankcase: 56 FS
3.3 out of 5 Customer Rating
Crankcase: 56 FS
$57.96
Cylinder Head: 105HZ Cylinder Head: 105HZ
5 out of 5 Customer Rating
Cylinder Head: 105HZ
$130.89
Cylinder Head: 91SX-H Cylinder Head: 91SX-H
3.1 out of 5 Customer Rating
Cylinder Head: 91SX-H
$99.99
Exhaust Pipe: 40-300 Exhaust Pipe: 40-300
5 out of 5 Customer Rating
Exhaust Pipe: 40-300
$11.84
Intake Manifold Assembly: FT-240/300 Intake Manifold Assembly: FT-240/300
5 out of 5 Customer Rating
Intake Manifold Assembly: FT-240/300
$54.99
Head Gasket: GT33 Head Gasket: GT33
3.3 out of 5 Customer Rating
Head Gasket: GT33
$14.84
Locknut Set 3/8M5S Locknut Set 3/8M5S
3.9 out of 5 Customer Rating
Locknut Set 3/8M5S
$26.24
Pushrod Cover: FS-40 Surpass Pushrod Cover: FS-40 Surpass
4.5 out of 5 Customer Rating
Pushrod Cover: FS-40 Surpass
$6.99
Carburetor Rotor: 61ER Carburetor Rotor: 61ER
4.1 out of 5 Customer Rating
Carburetor Rotor: 61ER
$13.79 Price reduced from $45.99 to
Clearance Sale! ⓘ
Spring Choke Friction: WLA-2, GT55 Spring Choke Friction: WLA-2, GT55
4.1 out of 5 Customer Rating
Spring Choke Friction: WLA-2, GT55
$5.99
Cover Plate: 160FX Cover Plate: 160FX
4.5 out of 5 Customer Rating
Cover Plate: 160FX
$19.14
Cylinder & Piston Assembly: R2101 Speed Cylinder & Piston Assembly: R2101 Speed
4.7 out of 5 Customer Rating
Cylinder & Piston Assembly: R2101 Speed
$177.63
Inner Head: B2102 Speed Inner Head: B2102 Speed
4.7 out of 5 Customer Rating
Inner Head: B2102 Speed
$52.69
Inner Head: O.S. Speed R2104 Inner Head: O.S. Speed R2104
5 out of 5 Customer Rating
Inner Head: O.S. Speed R2104
$76.71
Idle Adj Valve STP #6H7L8H Idle Adj Valve STP #6H7L8H
4.1 out of 5 Customer Rating
Idle Adj Valve STP #6H7L8H
$6.49
Meter Needle Assembly #12FB: 12XZ Speed Meter Needle Assembly #12FB: 12XZ Speed
5 out of 5 Customer Rating
Meter Needle Assembly #12FB: 12XZ Speed
$17.99
Inner Head: T1201 Speed Inner Head: T1201 Speed
4.7 out of 5 Customer Rating
Inner Head: T1201 Speed
$37.99
O.S. Outer Head Speed: T1203 O.S. Outer Head Speed: T1203
3.9 out of 5 Customer Rating
O.S. Outer Head Speed: T1203
$89.99
Heat Sink Head: 30VG Heat Sink Head: 30VG
3.1 out of 5 Customer Rating
Heat Sink Head: 30VG
$91.34
Inner Head: 12XZ Speed Inner Head: 12XZ Speed
5 out of 5 Customer Rating
Inner Head: 12XZ Speed
$30.99
Intake Manifold 200 Surpass Intake Manifold 200 Surpass
4.2 out of 5 Customer Rating
Intake Manifold 200 Surpass
$34.86
Motor Mount: 15CV-A, 10LA Motor Mount: 15CV-A, 10LA
4 out of 5 Customer Rating
Motor Mount: 15CV-A, 10LA
$25.44
Camshaft: FS72 Alpha Camshaft: FS72 Alpha
4.2 out of 5 Customer Rating
Camshaft: FS72 Alpha
$54.63
Connecting Rod: FS-120 SP Connecting Rod: FS-120 SP
5 out of 5 Customer Rating
Connecting Rod: FS-120 SP
$40.12
Connecting Rod Bearing: GGT10 Connecting Rod Bearing: GGT10
5 out of 5 Customer Rating
Connecting Rod Bearing: GGT10
$7.63 Price reduced from $25.44 to
Clearance Sale! ⓘ
Crankpin Stop Screw: GT60 Crankpin Stop Screw: GT60
4.8 out of 5 Customer Rating
Crankpin Stop Screw: GT60
$11.80
Collector Ring: FR7 Sirius 7 Collector Ring: FR7 Sirius 7
5 out of 5 Customer Rating
Collector Ring: FR7 Sirius 7
$346.62
Exhaust Valve Assembly: FS-70 Ultimate Exhaust Valve Assembly: FS-70 Ultimate
5 out of 5 Customer Rating
Exhaust Valve Assembly: FS-70 Ultimate
$40.12
Cover Gasket: FS-70 Ultimate Cover Gasket: FS-70 Ultimate
3.4 out of 5 Customer Rating
Cover Gasket: FS-70 Ultimate
$11.91
Case Gasket: GT60 Case Gasket: GT60
3.4 out of 5 Customer Rating
Case Gasket: GT60
$7.46
Silencer Body: 200 Surpass Silencer Body: 200 Surpass
4.4 out of 5 Customer Rating
Silencer Body: 200 Surpass
$87.21
Pushrod Cover: FS-26 Surpass Pushrod Cover: FS-26 Surpass
5 out of 5 Customer Rating
Pushrod Cover: FS-26 Surpass
$8.49
Air Funnel: 56FS Air Funnel: 56FS
4.4 out of 5 Customer Rating
Air Funnel: 56FS
$5.28 Price reduced from $17.08 to
Clearance Sale! ⓘ
Carburetor: GT15HZ Carburetor: GT15HZ
5 out of 5 Customer Rating
Carburetor: GT15HZ
$190.20
Cam Cover Screws: FS-70 Ultimate (2) Cam Cover Screws: FS-70 Ultimate (2)
4.8 out of 5 Customer Rating
Cam Cover Screws: FS-70 Ultimate (2)
$7.46
Carburetor Retaining Screws: 2.6x18mm (10) Carburetor Retaining Screws: 2.6x18mm (10)
4.4 out of 5 Customer Rating
Carburetor Retaining Screws: 2.6x18mm (10)
$9.85
Connecting Rod: 56 FS Connecting Rod: 56 FS
3.2 out of 5 Customer Rating
Connecting Rod: 56 FS
$22.04
Connecting Rod: 91SX-H Complete Connecting Rod: 91SX-H Complete
5 out of 5 Customer Rating
Connecting Rod: 91SX-H Complete
$27.48
Cover Plate: FL-70 Cover Plate: FL-70
5 out of 5 Customer Rating
Cover Plate: FL-70
$9.99
Crankcase: FS72 Alpha Crankcase: FS72 Alpha
5 out of 5 Customer Rating
Crankcase: FS72 Alpha
$29.79 Price reduced from $87.39 to
Clearance Sale! ⓘ
Drive Gear Screw: 240-300 Drive Gear Screw: 240-300
3.6 out of 5 Customer Rating
Drive Gear Screw: 240-300
$6.49
Lever Metering Pin WLA-2: GT55 Lever Metering Pin WLA-2: GT55
4.8 out of 5 Customer Rating
Lever Metering Pin WLA-2: GT55
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Pushrod Cover: FS155A-P Pushrod Cover: FS155A-P
5 out of 5 Customer Rating
Pushrod Cover: FS155A-P
$10.94
Piston: FS-95V Piston: FS-95V
5 out of 5 Customer Rating
Piston: FS-95V
$48.43
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