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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529-576 of 1,758 Results
Valve Spring Retainer: 90-300 Valve Spring Retainer: 90-300
5 out of 5 Customer Rating
$6.49
Valve Spring Exhaust: FS-120 Surpass Valve Spring Exhaust: FS-120 Surpass
5 out of 5 Customer Rating
$6.49
Motor Mount: OMA-38 Series Motor Mount: OMA-38 Series
4.1 out of 5 Customer Rating
$15.99
Crankcase: 55AX Crankcase: 55AX
3.3 out of 5 Customer Rating
$67.24
Crankcase: 160FX Crankcase: 160FX
5 out of 5 Customer Rating
$152.36
Crankcase: 56 FS Crankcase: 56 FS
3.3 out of 5 Customer Rating
$57.96
Cylinder Head: 105HZ Cylinder Head: 105HZ
5 out of 5 Customer Rating
$130.89
Cylinder Head: 91SX-H Cylinder Head: 91SX-H
3.1 out of 5 Customer Rating
$99.99
Exhaust Pipe: 40-300 Exhaust Pipe: 40-300
5 out of 5 Customer Rating
$11.84
Head Gasket: GT33 Head Gasket: GT33
3.3 out of 5 Customer Rating
$14.84
Intake Manifold Assembly: FT-240/300 Intake Manifold Assembly: FT-240/300
5 out of 5 Customer Rating
$54.99
Locknut Set 3/8M5S Locknut Set 3/8M5S
3.9 out of 5 Customer Rating
$26.24
Assembly Screw: 55AX Assembly Screw: 55AX
5 out of 5 Customer Rating
$9.85
Pushrod Cover: FS-40 Surpass Pushrod Cover: FS-40 Surpass
4.5 out of 5 Customer Rating
$6.99
Bearing R-1350ZZ Bearing R-1350ZZ
5 out of 5 Customer Rating
$14.99
Crankshaft Clamp: GT15, 105, 91 Heli Crankshaft Clamp: GT15, 105, 91 Heli
3.3 out of 5 Customer Rating
$25.44
Booster Cable: Single Booster Cable: Single
5 out of 5 Customer Rating
$21.04
Carburetor Rotor: 61ER Carburetor Rotor: 61ER
4.1 out of 5 Customer Rating
$13.79 Price reduced from $45.99 to
Clearance Sale!
Carburetor Rotor: 61E New 91HZ Carburetor Rotor: 61E New 91HZ
4.7 out of 5 Customer Rating
$14.50 Price reduced from $48.32 to
Clearance Sale!
Spring Choke Friction: WLA-2, GT55 Spring Choke Friction: WLA-2, GT55
4.1 out of 5 Customer Rating
$5.99
Cover Plate: 160FX Cover Plate: 160FX
4.5 out of 5 Customer Rating
$19.14
Cylinder & Piston Assembly: R2101 Speed Cylinder & Piston Assembly: R2101 Speed
4.7 out of 5 Customer Rating
$177.63
Inner Head: B2102 Speed Inner Head: B2102 Speed
4.7 out of 5 Customer Rating
$52.69
Inner Head: O.S. Speed R2104 Inner Head: O.S. Speed R2104
5 out of 5 Customer Rating
$76.71
Idle Adj Valve STP #6H7L8H Idle Adj Valve STP #6H7L8H
4.1 out of 5 Customer Rating
$6.49
Needle Holder 21M: 21XZ-R Needle Holder 21M: 21XZ-R
5 out of 5 Customer Rating
$16.09
Meter Needle Assembly #12FB: 12XZ Speed Meter Needle Assembly #12FB: 12XZ Speed
5 out of 5 Customer Rating
$17.99
Inner Head: T1201 Speed Inner Head: T1201 Speed
4.7 out of 5 Customer Rating
$37.99
O.S. Outer Head Speed: T1203 O.S. Outer Head Speed: T1203
3.9 out of 5 Customer Rating
$89.99
Heat Sink Head: 30VG Heat Sink Head: 30VG
3.1 out of 5 Customer Rating
$91.34
Inner Head: 12XZ Speed Inner Head: 12XZ Speed
5 out of 5 Customer Rating
$30.99
90 Degree In-Cowl Header: FS110A 90 Degree In-Cowl Header: FS110A
4.8 out of 5 Customer Rating
$36.85
Intake Manifold 200 Surpass Intake Manifold 200 Surpass
4.2 out of 5 Customer Rating
$34.86
Motor Mount: 15CV-A, 10LA Motor Mount: 15CV-A, 10LA
4 out of 5 Customer Rating
$25.44
Front Bearing: 90-300 Front Bearing: 90-300
4 out of 5 Customer Rating
$22.16
Camshaft: FS72 Alpha Camshaft: FS72 Alpha
4.2 out of 5 Customer Rating
$54.63
Connecting Rod: FS-120 SP Connecting Rod: FS-120 SP
5 out of 5 Customer Rating
$40.12
Connecting Rod Bearing: GGT10 Connecting Rod Bearing: GGT10
5 out of 5 Customer Rating
$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
$11.80
Cylinder Head: FS-91-P Cylinder Head: FS-91-P
4.8 out of 5 Customer Rating
$81.94
Collector Ring: FR7 Sirius 7 Collector Ring: FR7 Sirius 7
5 out of 5 Customer Rating
$346.62
Exhaust Valve Assembly: FS-70 Ultimate Exhaust Valve Assembly: FS-70 Ultimate
5 out of 5 Customer Rating
$40.12
Cover Gasket: FS-70 Ultimate Cover Gasket: FS-70 Ultimate
3.4 out of 5 Customer Rating
$11.91
Case Gasket: GT60 Case Gasket: GT60
3.4 out of 5 Customer Rating
$7.46
Silencer Body: 200 Surpass Silencer Body: 200 Surpass
4.4 out of 5 Customer Rating
$87.21
Pushrod Cover: FS-26 Surpass Pushrod Cover: FS-26 Surpass
5 out of 5 Customer Rating
$8.49
Piston Ring: 140RX Piston Ring: 140RX
5 out of 5 Customer Rating
$9.77 Price reduced from $32.56 to
Clearance Sale!
Throttle Lever Screw #10212A Throttle Lever Screw #10212A
4.4 out of 5 Customer Rating
$1.95 Price reduced from $6.49 to
Clearance Sale!