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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769-816 of 1,758 Results
Needle A IFNVA Needle A IFNVA
3.1 out of 5 Customer Rating
Needle A IFNVA
$11.80
Needle Valve Assembly 61H: GT15 Needle Valve Assembly 61H: GT15
3.7 out of 5 Customer Rating
Needle Valve Assembly 61H: GT15
$22.04
Cover Assembly Metering WLA-2: GT55 Cover Assembly Metering WLA-2: GT55
4.5 out of 5 Customer Rating
Cover Assembly Metering WLA-2: GT55
$14.99
O-Ring Silencer #E3080: 35AX O-Ring Silencer #E3080: 35AX
4.1 out of 5 Customer Rating
O-Ring Silencer #E3080: 35AX
$3.28 Price reduced from $10.94 to
Clearance Sale! ⓘ
Piston: 95AX Piston: 95AX
5 out of 5 Customer Rating
Piston: 95AX
$48.41
Piston Ring: FS155A-P Piston Ring: FS155A-P
5 out of 5 Customer Rating
Piston Ring: FS155A-P
$38.03
Piston Ring: GT60 Piston Ring: GT60
4.7 out of 5 Customer Rating
Piston Ring: GT60
$30.44
Thermo Insulator: GF30 Thermo Insulator: GF30
3.5 out of 5 Customer Rating
Thermo Insulator: GF30
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Thrust Washer 10-15 Thrust Washer 10-15
4.5 out of 5 Customer Rating
Thrust Washer 10-15
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Thrust Washer: 20-40FP Thrust Washer: 20-40FP
5 out of 5 Customer Rating
Thrust Washer: 20-40FP
$7.99
Parallel Key: GT55 Parallel Key: GT55
3.3 out of 5 Customer Rating
Parallel Key: GT55
$7.46
Valve Collet: FS-91 Surpass Valve Collet: FS-91 Surpass
3.3 out of 5 Customer Rating
Valve Collet: FS-91 Surpass
$10.86
Main Shaft: 3815-1000 Main Shaft: 3815-1000
4.3 out of 5 Customer Rating
Main Shaft: 3815-1000
$8.99
Pump Unit (PD-09): GF30 II Pump Unit (PD-09): GF30 II
5 out of 5 Customer Rating
Pump Unit (PD-09): GF30 II
$109.26
Camshaft: FS-91 Surpass Camshaft: FS-91 Surpass
3.7 out of 5 Customer Rating
Camshaft: FS-91 Surpass
$60.57
Carburetor Rotor: #40D Carburetor Rotor: #40D
3.7 out of 5 Customer Rating
Carburetor Rotor: #40D
$11.80
Carburetor Rotor: 91SZ-H Hyper Carburetor Rotor: 91SZ-H Hyper
3.3 out of 5 Customer Rating
Carburetor Rotor: 91SZ-H Hyper
$11.99 Price reduced from $39.99 to
Clearance Sale! ⓘ
Piston Pin: 56 FS Piston Pin: 56 FS
4.5 out of 5 Customer Rating
Piston Pin: 56 FS
$11.91
Rear Adapter: 18CV-RX Rear Adapter: 18CV-RX
5 out of 5 Customer Rating
Rear Adapter: 18CV-RX
$17.08
Cylinder and Piston Assembly: O.S. Speed B2104 Cylinder and Piston Assembly: O.S. Speed B2104
4.5 out of 5 Customer Rating
Cylinder and Piston Assembly: O.S. Speed B2104
$193.70
O.S. Cylinder and Piston Assy Speed B2103 Type S O.S. Cylinder and Piston Assy Speed B2103 Type S
5 out of 5 Customer Rating
O.S. Cylinder and Piston Assy Speed B2103 Type S
$193.68
Universal Nipple: #21, T1202 Speed Universal Nipple: #21, T1202 Speed
4.5 out of 5 Customer Rating
Universal Nipple: #21, T1202 Speed
$11.95
Head Gasket: B2101 Speed Head Gasket: B2101 Speed
4.7 out of 5 Customer Rating
Head Gasket: B2101 Speed
$12.04
Piston Pin: 25XZ Piston Pin: 25XZ
5 out of 5 Customer Rating
Piston Pin: 25XZ
$7.99
Screw Set (8): 18TZ-TX Screw Set (8): 18TZ-TX
4.7 out of 5 Customer Rating
Screw Set (8): 18TZ-TX
$9.85
Slide Valve 12F3: T1201 Speed Slide Valve 12F3: T1201 Speed
4.7 out of 5 Customer Rating
Slide Valve 12F3: T1201 Speed
$11.71 Price reduced from $39.05 to
Clearance Sale! ⓘ
T-1060 Silencer Clamp T-1060 Silencer Clamp
5 out of 5 Customer Rating
T-1060 Silencer Clamp
$11.47
O.S. Crankcase Speed B2103 Type S & Type R O.S. Crankcase Speed B2103 Type S & Type R
5 out of 5 Customer Rating
O.S. Crankcase Speed B2103 Type S & Type R
$147.19
Outer Head: Speed 12TZ Outer Head: Speed 12TZ
4.5 out of 5 Customer Rating
Outer Head: Speed 12TZ
$92.99
Heat Sink Head: 50SX-H Heat Sink Head: 50SX-H
5 out of 5 Customer Rating
Heat Sink Head: 50SX-H
$50.76
Cover Plate: 50SX-H Cover Plate: 50SX-H
4.2 out of 5 Customer Rating
Cover Plate: 50SX-H
$11.80
Inner Head: Speed 21XZ-GT Inner Head: Speed 21XZ-GT
5 out of 5 Customer Rating
Inner Head: Speed 21XZ-GT
$15.81 Price reduced from $52.69 to
Clearance Sale! ⓘ
Needle 21M: 21XZ-R Needle 21M: 21XZ-R
5 out of 5 Customer Rating
Needle 21M: 21XZ-R
$13.78
Metering Needle Assembly Speed 12TZ Metering Needle Assembly Speed 12TZ
5 out of 5 Customer Rating
Metering Needle Assembly Speed 12TZ
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
Piston Pin: 18CV-R Piston Pin: 18CV-R
4.4 out of 5 Customer Rating
Piston Pin: 18CV-R
$4.22 Price reduced from $14.07 to
Clearance Sale! ⓘ
Needle 3 (21M) Needle 3 (21M)
4 out of 5 Customer Rating
Needle 3 (21M)
$15.99
Exhaust Header Assembly: 56 FS Exhaust Header Assembly: 56 FS
4.5 out of 5 Customer Rating
Exhaust Header Assembly: 56 FS
$4.13 Price reduced from $13.78 to
Clearance Sale! ⓘ
Intake Manifold: FS-120II Intake Manifold: FS-120II
3.6 out of 5 Customer Rating
Intake Manifold: FS-120II
$8.85 Price reduced from $29.49 to
Clearance Sale! ⓘ
Muffler Assembly Screw #E-2030 Muffler Assembly Screw #E-2030
5 out of 5 Customer Rating
Muffler Assembly Screw #E-2030
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Piston Ring: 56 FS Piston Ring: 56 FS
3.6 out of 5 Customer Rating
Piston Ring: 56 FS
$8.85 Price reduced from $29.49 to
Clearance Sale! ⓘ
Piston Pin: 40 46VFR Piston Pin: 40 46VFR
5 out of 5 Customer Rating
Piston Pin: 40 46VFR
$9.85
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! ⓘ
Crankcase: 75AX Crankcase: 75AX
3.3 out of 5 Customer Rating
Crankcase: 75AX
$35.93 Price reduced from $119.78 to
Clearance Sale! ⓘ
Cover Plate: 35AX Cover Plate: 35AX
4.4 out of 5 Customer Rating
Cover Plate: 35AX
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
Cover Plate: FS155A-P Cover Plate: FS155A-P
5 out of 5 Customer Rating
Cover Plate: FS155A-P
$6.61 Price reduced from $22.04 to
Clearance Sale! ⓘ
Cover Plate: FS72 Alpha Cover Plate: FS72 Alpha
4.5 out of 5 Customer Rating
Cover Plate: FS72 Alpha
$5.15 Price reduced from $17.16 to
Clearance Sale! ⓘ
Cover Plate: FS-62V Cover Plate: FS-62V
4.5 out of 5 Customer Rating
Cover Plate: FS-62V
$4.73 Price reduced from $15.76 to
Clearance Sale! ⓘ
Piston Ring: FS-62V Piston Ring: FS-62V
4.7 out of 5 Customer Rating
Piston Ring: FS-62V
$10.42 Price reduced from $34.76 to
Clearance Sale! ⓘ
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