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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433-480 of 1,758 Results
Prop Shaft Set: OMA-28 Series Prop Shaft Set: OMA-28 Series
3.6 out of 5 Customer Rating
Prop Shaft Set: OMA-28 Series
$6.29 Price reduced from $20.99 to
Clearance Sale! ⓘ
Rotor Spring #2CK #2B Rotor Spring #2CK #2B
5 out of 5 Customer Rating
Rotor Spring #2CK #2B
$6.49
Cylinder Rebuild Kit: R21 Cylinder Rebuild Kit: R21
4.4 out of 5 Customer Rating
Cylinder Rebuild Kit: R21
$188.45
Cylinder Rebuild Kit: 21XZ-GT Speed Cylinder Rebuild Kit: 21XZ-GT Speed
4.4 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XZ-GT Speed
$66.47 Price reduced from $221.55 to
Clearance Sale! ⓘ
Outer Head: O.S. Speed R2104 Outer Head: O.S. Speed R2104
3.6 out of 5 Customer Rating
Outer Head: O.S. Speed R2104
$148.60
Pump Body Assembly: WLA-2 GT55 Pump Body Assembly: WLA-2 GT55
4.2 out of 5 Customer Rating
Pump Body Assembly: WLA-2 GT55
$32.99
Radial Mount: Sirius 7 Radial Mount: Sirius 7
5 out of 5 Customer Rating
Radial Mount: Sirius 7
$135.66
Camshaft: FS-91-P Camshaft: FS-91-P
4.8 out of 5 Customer Rating
Camshaft: FS-91-P
$60.72
Carburetor Body: #70C Carburetor Body: #70C
4 out of 5 Customer Rating
Carburetor Body: #70C
$87.39
Choke Valve: WLA-2, GT55 Choke Valve: WLA-2, GT55
5 out of 5 Customer Rating
Choke Valve: WLA-2, GT55
$14.99
Rear Cover Plate: GT22 Rear Cover Plate: GT22
5 out of 5 Customer Rating
Rear Cover Plate: GT22
$30.44
Crankcase: 95AX Crankcase: 95AX
4.4 out of 5 Customer Rating
Crankcase: 95AX
$125.04
Cylinder Liner: FS110A Cylinder Liner: FS110A
5 out of 5 Customer Rating
Cylinder Liner: FS110A
$49.46
Muffler Screw: 120AX Muffler Screw: 120AX
4.4 out of 5 Customer Rating
Muffler Screw: 120AX
$8.43
Piston Pin: GT22 Piston Pin: GT22
3.6 out of 5 Customer Rating
Piston Pin: GT22
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
O-Ring Large: 120Surpass O-Ring Large: 120Surpass
5 out of 5 Customer Rating
O-Ring Large: 120Surpass
$6.49
Piston Ring: FS110A Piston Ring: FS110A
5 out of 5 Customer Rating
Piston Ring: FS110A
$29.49
Rocker Support: FS155A-P Rocker Support: FS155A-P
5 out of 5 Customer Rating
Rocker Support: FS155A-P
$11.68 Price reduced from $38.95 to
Clearance Sale! ⓘ
Throttle Lever: 120Surpass Throttle Lever: 120Surpass
3.6 out of 5 Customer Rating
Throttle Lever: 120Surpass
$6.49
Cover Plate: GF30 II Cover Plate: GF30 II
4.2 out of 5 Customer Rating
Cover Plate: GF30 II
$44.17
Air Bleed Screw: FL70 Air Bleed Screw: FL70
4.2 out of 5 Customer Rating
Air Bleed Screw: FL70
$5.99
Front Bearing: 12-300 Front Bearing: 12-300
5 out of 5 Customer Rating
Front Bearing: 12-300
$21.17
Rear Bearing: GT60 Rear Bearing: GT60
3.8 out of 5 Customer Rating
Rear Bearing: GT60
$25.44
Rear Bearing: 50SX-H, 55HZ, 55AX Rear Bearing: 50SX-H, 55HZ, 55AX
5 out of 5 Customer Rating
Rear Bearing: 50SX-H, 55HZ, 55AX
$34.76
Carburetor Rotor: 61T, FS-62V Carburetor Rotor: 61T, FS-62V
3.6 out of 5 Customer Rating
Carburetor Rotor: 61T, FS-62V
$9.13 Price reduced from $30.44 to
Clearance Sale! ⓘ
Cover Plate: GT15 Cover Plate: GT15
4.8 out of 5 Customer Rating
Cover Plate: GT15
$18.99
Crankshaft: 200 Surpass Crankshaft: 200 Surpass
4 out of 5 Customer Rating
Crankshaft: 200 Surpass
$37.62 Price reduced from $125.39 to
Clearance Sale! ⓘ
Cylinder Head Assembly: FS-120 III Cylinder Head Assembly: FS-120 III
4 out of 5 Customer Rating
Cylinder Head Assembly: FS-120 III
$162.95
Drive Washer: GT22 Drive Washer: GT22
4 out of 5 Customer Rating
Drive Washer: GT22
$39.91
Head Gasket FS155A-P Head Gasket FS155A-P
4.4 out of 5 Customer Rating
Head Gasket FS155A-P
$6.49
Carburetor Gasket: GT15HZ Carburetor Gasket: GT15HZ
3.4 out of 5 Customer Rating
Carburetor Gasket: GT15HZ
$10.94
Electronic Ignition Module: GT55 Electronic Ignition Module: GT55
4.8 out of 5 Customer Rating
Electronic Ignition Module: GT55
$303.45
Intake Manifold Assembly: FS-120III Intake Manifold Assembly: FS-120III
5 out of 5 Customer Rating
Intake Manifold Assembly: FS-120III
$34.86
Mixture Control Valve: #60K Mixture Control Valve: #60K
5 out of 5 Customer Rating
Mixture Control Valve: #60K
$7.79 Price reduced from $25.99 to
Clearance Sale! ⓘ
Muffler Assembly F-5050: FS-95V Muffler Assembly F-5050: FS-95V
4.4 out of 5 Customer Rating
Muffler Assembly F-5050: FS-95V
$63.04
Reed Valve Assembly: GT60 Reed Valve Assembly: GT60
5 out of 5 Customer Rating
Reed Valve Assembly: GT60
$25.19
Thrust Washer: 120Surpass Thrust Washer: 120Surpass
4 out of 5 Customer Rating
Thrust Washer: 120Surpass
$6.49
Dust Cover: #2BK Dust Cover: #2BK
4 out of 5 Customer Rating
Dust Cover: #2BK
$10.86
Head Gasket: 15CV Head Gasket: 15CV
4.8 out of 5 Customer Rating
Head Gasket: 15CV
$6.49
Needle Valve Assembly #10J #10M Needle Valve Assembly #10J #10M
4.4 out of 5 Customer Rating
Needle Valve Assembly #10J #10M
$26.24
Speed Ball Driver Replacement Tip 2.5 Speed Ball Driver Replacement Tip 2.5
3.6 out of 5 Customer Rating
Speed Ball Driver Replacement Tip 2.5
$18.53
M2002SC 80mm Manifold: 21XZ-B, 21VZ-B, 25XZ, 30VG M2002SC 80mm Manifold: 21XZ-B, 21VZ-B, 25XZ, 30VG
4 out of 5 Customer Rating
M2002SC 80mm Manifold: 21XZ-B, 21VZ-B, 25XZ, 30VG
$67.39
T-2060SC WN Tuned Pipe Complete Set T-2060SC WN Tuned Pipe Complete Set
4.4 out of 5 Customer Rating
T-2060SC WN Tuned Pipe Complete Set
$152.36
Cover Plate: R21 Cover Plate: R21
4 out of 5 Customer Rating
Cover Plate: R21
$6.61 Price reduced from $22.04 to
Clearance Sale! ⓘ
Crankshaft: 18TM Crankshaft: 18TM
5 out of 5 Customer Rating
Crankshaft: 18TM
$55.14
Crankshaft: 21XR-B Version II Crankshaft: 21XR-B Version II
4.8 out of 5 Customer Rating
Crankshaft: 21XR-B Version II
$18.83 Price reduced from $62.78 to
Clearance Sale! ⓘ
Outer Head: R2101 Speed Outer Head: R2101 Speed
3.4 out of 5 Customer Rating
Outer Head: R2101 Speed
$102.35
Universal Nipple #12 Universal Nipple #12
5 out of 5 Customer Rating
Universal Nipple #12
$6.49
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