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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1,374-1,421 of 1,758 Results
Spring Needle Adjust WLA-2: GT55 Spring Needle Adjust WLA-2: GT55
5 out of 5 Customer Rating
Spring Needle Adjust WLA-2: GT55
$10.99
E3071 Muffler E3071 Muffler
3.3 out of 5 Customer Rating
E3071 Muffler
$34.82
Needle Assembly #7M #7L Needle Assembly #7M #7L
5 out of 5 Customer Rating
Needle Assembly #7M #7L
$22.04
O-Ring Large: FS90IIS O-Ring Large: FS90IIS
4.1 out of 5 Customer Rating
O-Ring Large: FS90IIS
$6.49
Crankshaft: O.S. FS-64V Crankshaft: O.S. FS-64V
4.7 out of 5 Customer Rating
Crankshaft: O.S. FS-64V
$66.99
Screw Set (12): FS-26 Surpass Screw Set (12): FS-26 Surpass
3.3 out of 5 Customer Rating
Screw Set (12): FS-26 Surpass
$9.46
Drive Washer: 120AX Drive Washer: 120AX
5 out of 5 Customer Rating
Drive Washer: 120AX
$8.19 Price reduced from $27.29 to
Clearance Sale! ⓘ
Woodruff Key: 30Wankel Woodruff Key: 30Wankel
3.9 out of 5 Customer Rating
Woodruff Key: 30Wankel
$6.49
Cylinder Liner 91HZ-R Speed 3D Cylinder Liner 91HZ-R Speed 3D
3.3 out of 5 Customer Rating
Cylinder Liner 91HZ-R Speed 3D
$121.99
Piston/Sleeve/Rod set: O.S. SPEED R2106 Piston/Sleeve/Rod set: O.S. SPEED R2106
4.5 out of 5 Customer Rating
Piston/Sleeve/Rod set: O.S. SPEED R2106
$279.99
Heatsink Head 55HZ.HZ-R Heatsink Head 55HZ.HZ-R
4.7 out of 5 Customer Rating
Heatsink Head 55HZ.HZ-R
$138.99
Carburetor Body: #10H Carburetor Body: #10H
4.5 out of 5 Customer Rating
Carburetor Body: #10H
$13.99
Carburetor Body: 40L, 55HZ Hyper Carburetor Body: 40L, 55HZ Hyper
4.1 out of 5 Customer Rating
Carburetor Body: 40L, 55HZ Hyper
$23.00 Price reduced from $76.68 to
Clearance Sale! ⓘ
Connecting Rod: 21VF/SE Connecting Rod: 21VF/SE
4.1 out of 5 Customer Rating
Connecting Rod: 21VF/SE
$21.10
Connecting Rod with Bearings: GT60 Connecting Rod with Bearings: GT60
3.7 out of 5 Customer Rating
Connecting Rod with Bearings: GT60
$97.90
Crankshaft: 105HZ Crankshaft: 105HZ
5 out of 5 Customer Rating
Crankshaft: 105HZ
$30.72 Price reduced from $102.41 to
Clearance Sale! ⓘ
Cylinder Head: FS-95V Cylinder Head: FS-95V
4.5 out of 5 Customer Rating
Cylinder Head: FS-95V
$29.31 Price reduced from $97.70 to
Clearance Sale! ⓘ
Cylinder Head with Valve: FS-91-P Cylinder Head with Valve: FS-91-P
4.5 out of 5 Customer Rating
Cylinder Head with Valve: FS-91-P
$135.63
Exhaust Pipe: 120-240 Exhaust Pipe: 120-240
3.7 out of 5 Customer Rating
Exhaust Pipe: 120-240
$21.04
Exhaust Gasket: 55HZ Exhaust Gasket: 55HZ
3.7 out of 5 Customer Rating
Exhaust Gasket: 55HZ
$17.16
Exhaust Gasket: GT33 Exhaust Gasket: GT33
5 out of 5 Customer Rating
Exhaust Gasket: GT33
$7.46
Muffler Assembly Screw: 65AX Muffler Assembly Screw: 65AX
4.1 out of 5 Customer Rating
Muffler Assembly Screw: 65AX
$2.55 Price reduced from $8.49 to
Clearance Sale! ⓘ
O-Ring Needle: FS/FX/LA O-Ring Needle: FS/FX/LA
3.9 out of 5 Customer Rating
O-Ring Needle: FS/FX/LA
$8.49
Piston Ring: FS72 Alpha Piston Ring: FS72 Alpha
4.1 out of 5 Customer Rating
Piston Ring: FS72 Alpha
$8.85 Price reduced from $29.49 to
Clearance Sale! ⓘ
Cap Screws M3 5x20(10): FL-70 Cap Screws M3 5x20(10): FL-70
3.5 out of 5 Customer Rating
Cap Screws M3 5x20(10): FL-70
$9.85
Throttle Lever Assembly: GT15HZ Throttle Lever Assembly: GT15HZ
4.1 out of 5 Customer Rating
Throttle Lever Assembly: GT15HZ
$9.49
Rocker Cover Retaining Screws: FS-200S Rocker Cover Retaining Screws: FS-200S
5 out of 5 Customer Rating
Rocker Cover Retaining Screws: FS-200S
$9.85
Connector Set: OMA-38 Connector Set: OMA-38
5 out of 5 Customer Rating
Connector Set: OMA-38
$13.99
Cylinder Head: 55AX Cylinder Head: 55AX
3.7 out of 5 Customer Rating
Cylinder Head: 55AX
$34.86
Super Can Filter, Large Super Can Filter, Large
5 out of 5 Customer Rating
Super Can Filter, Large
$14.99
Intake Manifold Assembly: FT-120 and FT-160 Intake Manifold Assembly: FT-120 and FT-160
4.1 out of 5 Customer Rating
Intake Manifold Assembly: FT-120 and FT-160
$44.10
Mixture Control Valve #60C: 61FX Mixture Control Valve #60C: 61FX
4.1 out of 5 Customer Rating
Mixture Control Valve #60C: 61FX
$2.96 Price reduced from $9.85 to
Clearance Sale! ⓘ
Muffler Assembly: F-4050 FS-62V Muffler Assembly: F-4050 FS-62V
5 out of 5 Customer Rating
Muffler Assembly: F-4050 FS-62V
$52.73
Needle Inlet Valve WLA-2: GT55 Needle Inlet Valve WLA-2: GT55
5 out of 5 Customer Rating
Needle Inlet Valve WLA-2: GT55
$17.11
Needle Assembly: #86, #8H Needle Assembly: #86, #8H
4.1 out of 5 Customer Rating
Needle Assembly: #86, #8H
$22.04
Prop Washer: 20-40 Prop Washer: 20-40
5 out of 5 Customer Rating
Prop Washer: 20-40
$6.49
Pushrod: FS72 Alpha Pushrod: FS72 Alpha
4.5 out of 5 Customer Rating
Pushrod: FS72 Alpha
$2.96 Price reduced from $9.85 to
Clearance Sale! ⓘ
Regulator Seat: 61E-R Regulator Seat: 61E-R
4.1 out of 5 Customer Rating
Regulator Seat: 61E-R
$3.56 Price reduced from $11.87 to
Clearance Sale! ⓘ
Wave Washer: Sirius 7 Wave Washer: Sirius 7
5 out of 5 Customer Rating
Wave Washer: Sirius 7
$6.49
Main Shaft: 5010-810 Main Shaft: 5010-810
3.3 out of 5 Customer Rating
Main Shaft: 5010-810
$10.99
Self-Tapping Screw, 2X12 (10) Self-Tapping Screw, 2X12 (10)
3.7 out of 5 Customer Rating
Self-Tapping Screw, 2X12 (10)
$8.58
Carburetor: 61B-PII 91HZ-PSII Carburetor: 61B-PII 91HZ-PSII
5 out of 5 Customer Rating
Carburetor: 61B-PII 91HZ-PSII
$86.14 Price reduced from $226.99 to
Clearance Sale! ⓘ
Flex Pipe 240mm 1114A: FT-300 Flex Pipe 240mm 1114A: FT-300
5 out of 5 Customer Rating
Flex Pipe 240mm 1114A: FT-300
$48.32
Carburetor Body: FS-52 Carburetor Body: FS-52
4.1 out of 5 Customer Rating
Carburetor Body: FS-52
$29.49
Carburetor Screw: FS-20 Carburetor Screw: FS-20
5 out of 5 Customer Rating
Carburetor Screw: FS-20
$6.49
Carburetor Retainer: 12TZ Spec II Carburetor Retainer: 12TZ Spec II
3.7 out of 5 Customer Rating
Carburetor Retainer: 12TZ Spec II
$13.78
Crankshaft: T1201 Speed Crankshaft: T1201 Speed
5 out of 5 Customer Rating
Crankshaft: T1201 Speed
$39.27 Price reduced from $130.92 to
Clearance Sale! ⓘ
Crankshaft: 21VZ-B (P) Crankshaft: 21VZ-B (P)
4.5 out of 5 Customer Rating
Crankshaft: 21VZ-B (P)
$34.67 Price reduced from $115.57 to
Clearance Sale! ⓘ
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