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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174-221 of 1,758 Results
Carb Reducer 5.8MM Natural TYII Carb Reducer 5.8MM Natural TYII
3.4 out of 5 Customer Rating
Carb Reducer 5.8MM Natural TYII
$20.05
Muffler Extension Adapter 12 20mm: 49PI Muffler Extension Adapter 12 20mm: 49PI
4 out of 5 Customer Rating
Muffler Extension Adapter 12 20mm: 49PI
$27.29
Plug Cable Set: Sirius 7 Plug Cable Set: Sirius 7
5 out of 5 Customer Rating
Plug Cable Set: Sirius 7
$16.09
Cam Cover: FS72 Alpha Cam Cover: FS72 Alpha
4.8 out of 5 Customer Rating
Cam Cover: FS72 Alpha
$11.91
WLA-2 Screw: 96-603, GT15HZ WLA-2 Screw: 96-603, GT15HZ
3.6 out of 5 Customer Rating
WLA-2 Screw: 96-603, GT15HZ
$6.49
Connecting Rod: FL-70 Connecting Rod: FL-70
5 out of 5 Customer Rating
Connecting Rod: FL-70
$21.10
Connecting Rod: GF30 Connecting Rod: GF30
4.8 out of 5 Customer Rating
Connecting Rod: GF30
$17.36 Price reduced from $57.86 to
Clearance Sale! ⓘ
Rear Cover: Sirius 7 Rear Cover: Sirius 7
3.4 out of 5 Customer Rating
Rear Cover: Sirius 7
$87.53 Price reduced from $173.36 to
Clearance Sale! ⓘ
Gasket Passage: WLA-2, GT55 Gasket Passage: WLA-2, GT55
5 out of 5 Customer Rating
Gasket Passage: WLA-2, GT55
$11.99
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! ⓘ
Nozzle Screw: FS-40 Nozzle Screw: FS-40
5 out of 5 Customer Rating
Nozzle Screw: FS-40
$6.49
Silencer O-Ring E3070: 46AX 55AX Silencer O-Ring E3070: 46AX 55AX
4.4 out of 5 Customer Rating
Silencer O-Ring E3070: 46AX 55AX
$7.46
F-4051 Silencer: O.S. FS-64V F-4051 Silencer: O.S. FS-64V
5 out of 5 Customer Rating
F-4051 Silencer: O.S. FS-64V
$57.99
Connecting Rod: FS72 Alpha Connecting Rod: FS72 Alpha
4.2 out of 5 Customer Rating
Connecting Rod: FS72 Alpha
$26.24
Crankshaft: 91HZ Crankshaft: 91HZ
4.4 out of 5 Customer Rating
Crankshaft: 91HZ
$91.51
Crankshaft: 240-300 Crankshaft: 240-300
5 out of 5 Customer Rating
Crankshaft: 240-300
$284.01
Cylinder Head: 91HZR Cylinder Head: 91HZR
5 out of 5 Customer Rating
Cylinder Head: 91HZR
$99.54
Drive Washer: FF-240, 320 Drive Washer: FF-240, 320
5 out of 5 Customer Rating
Drive Washer: FF-240, 320
$38.84
Front Housing: GT60 Front Housing: GT60
5 out of 5 Customer Rating
Front Housing: GT60
$87.18
Intake Pipe Right: FT-120 160 Intake Pipe Right: FT-120 160
5 out of 5 Customer Rating
Intake Pipe Right: FT-120 160
$6.71 Price reduced from $22.37 to
Clearance Sale! ⓘ
Silencer Assembly F-5040: FS110A Silencer Assembly F-5040: FS110A
3.6 out of 5 Customer Rating
Silencer Assembly F-5040: FS110A
$57.86
Muffler Assembly Screw: F6020 FS155A-P Muffler Assembly Screw: F6020 FS155A-P
5 out of 5 Customer Rating
Muffler Assembly Screw: F6020 FS155A-P
$9.85
Piston Ring: 120AX Piston Ring: 120AX
4.4 out of 5 Customer Rating
Piston Ring: 120AX
$33.61
Prop Washer: GT55 Prop Washer: GT55
4.8 out of 5 Customer Rating
Prop Washer: GT55
$9.85
Hex Head Screw M3 (10): 91SZ-H Hex Head Screw M3 (10): 91SZ-H
5 out of 5 Customer Rating
Hex Head Screw M3 (10): 91SZ-H
$9.85
Tappet Screw: F40-300 Tappet Screw: F40-300
4.6 out of 5 Customer Rating
Tappet Screw: F40-300
$9.99
Cylinder Head: O.S. FS-64V Cylinder Head: O.S. FS-64V
5 out of 5 Customer Rating
Cylinder Head: O.S. FS-64V
$76.99
Valve Spring: FS155A-P Valve Spring: FS155A-P
4.4 out of 5 Customer Rating
Valve Spring: FS155A-P
$6.49
Valve Spring: F90 160 Valve Spring: F90 160
4.8 out of 5 Customer Rating
Valve Spring: F90 160
$6.49
Inner Head: R2102 Speed Inner Head: R2102 Speed
4 out of 5 Customer Rating
Inner Head: R2102 Speed
$51.64
Mixture Control Screw #10ER Mixture Control Screw #10ER
5 out of 5 Customer Rating
Mixture Control Screw #10ER
$9.85
O.S. Cylinder And Piston Speed: T1203 O.S. Cylinder And Piston Speed: T1203
4.4 out of 5 Customer Rating
O.S. Cylinder And Piston Speed: T1203
$119.99
Outer Head: B21 Speed Adam Drake Outer Head: B21 Speed Adam Drake
4.4 out of 5 Customer Rating
Outer Head: B21 Speed Adam Drake
$108.03
Inner Head: 21XZ-B Inner Head: 21XZ-B
3.4 out of 5 Customer Rating
Inner Head: 21XZ-B
$52.99
Outter Head: O.S.SPEED R21GT2 Outter Head: O.S.SPEED R21GT2
5 out of 5 Customer Rating
Outter Head: O.S.SPEED R21GT2
$133.99
Inner Head: T1202 Speed Inner Head: T1202 Speed
5 out of 5 Customer Rating
Inner Head: T1202 Speed
$37.99
Throttle Lever #11K Throttle Lever #11K
4 out of 5 Customer Rating
Throttle Lever #11K
$16.09
Carburetor Body: 40K, 46AXII Carburetor Body: 40K, 46AXII
4.5 out of 5 Customer Rating
Carburetor Body: 40K, 46AXII
$48.41
Cam Follower: 200 Surpass Cam Follower: 200 Surpass
3.3 out of 5 Customer Rating
Cam Follower: 200 Surpass
$22.26
Choke Shaft: WLA-2, GT55 Choke Shaft: WLA-2, GT55
3.9 out of 5 Customer Rating
Choke Shaft: WLA-2, GT55
$7.79 Price reduced from $25.99 to
Clearance Sale! ⓘ
Carburetor Rotor: 61HB Carburetor Rotor: 61HB
4.7 out of 5 Customer Rating
Carburetor Rotor: 61HB
$26.24
Connecting Rod: GT33 Connecting Rod: GT33
5 out of 5 Customer Rating
Connecting Rod: GT33
$67.42
Crankcase: 75AX Crankcase: 75AX
3.3 out of 5 Customer Rating
Crankcase: 75AX
$35.93 Price reduced from $119.78 to
Clearance Sale! ⓘ
Crankshaft: 50SX-H Crankshaft: 50SX-H
4.1 out of 5 Customer Rating
Crankshaft: 50SX-H
$55.12
Cylinder Liner: FS-40 Cylinder Liner: FS-40
4.1 out of 5 Customer Rating
Cylinder Liner: FS-40
$25.94
Fuel Inlet: #61B, 91HZ Fuel Inlet: #61B, 91HZ
3.5 out of 5 Customer Rating
Fuel Inlet: #61B, 91HZ
$11.80
Intake Manifold Assembly: FS-91 Surpass II Intake Manifold Assembly: FS-91 Surpass II
5 out of 5 Customer Rating
Intake Manifold Assembly: FS-91 Surpass II
$29.49
Pushrod Cover Assembly: FS72 Alpha Pushrod Cover Assembly: FS72 Alpha
5 out of 5 Customer Rating
Pushrod Cover Assembly: FS72 Alpha
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
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