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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1,710-1,757 of 1,758 Results
Rocker Cover: GF40 Rocker Cover: GF40
3.9 out of 5 Customer Rating
$6.35 Price reduced from $21.17 to
Clearance Sale!
Carburetor Reducer 6.5mm, Blue Aluminum Carburetor Reducer 6.5mm, Blue Aluminum
3.1 out of 5 Customer Rating
$6.33 Price reduced from $21.10 to
Clearance Sale!
Muffler Power Box: 120AX Muffler Power Box: 120AX
5 out of 5 Customer Rating
$21.46 Price reduced from $71.53 to
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Pilot Shaft: GT60 Pilot Shaft: GT60
5 out of 5 Customer Rating
$5.97 Price reduced from $19.90 to
Clearance Sale!
Throttle Lever #2CBD #2H Throttle Lever #2CBD #2H
4 out of 5 Customer Rating
$1.95 Price reduced from $6.49 to
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Connecting Rod: 35AX Connecting Rod: 35AX
3.6 out of 5 Customer Rating
$6.61 Price reduced from $22.04 to
Clearance Sale!
Piston Ring: FS-95V Piston Ring: FS-95V
5 out of 5 Customer Rating
$10.42 Price reduced from $34.76 to
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Crankshaft: 21VZ-R Crankshaft: 21VZ-R
4 out of 5 Customer Rating
$109.99
Cover Plate: 21XZ-B Speed Cover Plate: 21XZ-B Speed
5 out of 5 Customer Rating
$7.63 Price reduced from $25.44 to
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O-Ring Rubber Gasket: 120AX O-Ring Rubber Gasket: 120AX
5 out of 5 Customer Rating
$3.28 Price reduced from $10.94 to
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Built-Up Parts Set (C&P) O.S. Speed T1204 Built-Up Parts Set (C&P) O.S. Speed T1204
5 out of 5 Customer Rating
$51.38 Price reduced from $171.28 to
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Start Shaft: 18CV-RX Start Shaft: 18CV-RX
4.7 out of 5 Customer Rating
$19.14
Cylinder/Piston/Rod: Speed T1202 Cylinder/Piston/Rod: Speed T1202
5 out of 5 Customer Rating
$176.79
Back Plate Assembly O.S. Speed B21 Adam Drake Edition 3 Back Plate Assembly O.S. Speed B21 Adam Drake Edition 3
4.2 out of 5 Customer Rating
$12.59 Price reduced from $41.99 to
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Cylinder & Piston Set: O.S. Max .12 TG Version 4 Cylinder & Piston Set: O.S. Max .12 TG Version 4
5 out of 5 Customer Rating
$23.44 Price reduced from $78.13 to
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Cylinder Piston Rod Rebuild Kit: R2103 Speed Cylinder Piston Rod Rebuild Kit: R2103 Speed
5 out of 5 Customer Rating
$76.08 Price reduced from $253.61 to
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Screw Idle Speed WLA-2: GT55 Screw Idle Speed WLA-2: GT55
3.4 out of 5 Customer Rating
$7.19 Price reduced from $23.99 to
Clearance Sale!
Carburetor #21K: 35AX Carburetor #21K: 35AX
4.5 out of 5 Customer Rating
$87.29
Crankshaft: 25FX Crankshaft: 25FX
5 out of 5 Customer Rating
$11.61 Price reduced from $38.71 to
Clearance Sale!
Intake Valve: GF40 Intake Valve: GF40
3.3 out of 5 Customer Rating
$14.49 Price reduced from $48.31 to
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Needle #70A Needle #70A
3.7 out of 5 Customer Rating
$4.13 Price reduced from $13.78 to
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Valve Assembly Exhaust: FS-120 Surpass Valve Assembly Exhaust: FS-120 Surpass
5 out of 5 Customer Rating
$13.23 Price reduced from $44.10 to
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Valve Spring Retainer: 120Surpass Valve Spring Retainer: 120Surpass
3.7 out of 5 Customer Rating
$2.55 Price reduced from $8.49 to
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Valve Spring: GF40 Valve Spring: GF40
5 out of 5 Customer Rating
$2.84 Price reduced from $9.46 to
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Rocker Cover: FT-160 Rocker Cover: FT-160
4.1 out of 5 Customer Rating
$6.61 Price reduced from $22.04 to
Clearance Sale!
Crankcase: 55HZ Hyper Crankcase: 55HZ Hyper
4.8 out of 5 Customer Rating
$21.17 Price reduced from $70.56 to
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Drive Washer: GF40 Drive Washer: GF40
4.8 out of 5 Customer Rating
$12.63 Price reduced from $42.11 to
Clearance Sale!
Cylinder Assembly Rebuild Kit: 21XZ-R VII Cylinder Assembly Rebuild Kit: 21XZ-R VII
4.8 out of 5 Customer Rating
$82.83 Price reduced from $276.13 to
Clearance Sale!
O.S. Outer Head OS Speed R21GT O.S. Outer Head OS Speed R21GT
4.4 out of 5 Customer Rating
$39.69 Price reduced from $132.29 to
Clearance Sale!
Carburetor Assemblyy Screw WLA-2: GT55 Carburetor Assemblyy Screw WLA-2: GT55
4 out of 5 Customer Rating
$5.99
Muffler Body F-4050: FS-62V Muffler Body F-4050: FS-62V
3.2 out of 5 Customer Rating
$14.52 Price reduced from $48.43 to
Clearance Sale!
Exhaust Header Pipe Assembly F5040: FS110A Exhaust Header Pipe Assembly F5040: FS110A
3.6 out of 5 Customer Rating
$6.01 Price reduced from $20.05 to
Clearance Sale!
Head Gasket: 65LA Head Gasket: 65LA
4 out of 5 Customer Rating
$6.49
Rocker Cover: 56 FS Rocker Cover: 56 FS
3.6 out of 5 Customer Rating
$17.16
Crankshft Ball Bearing, Rear: 12TZ Spec II Crankshft Ball Bearing, Rear: 12TZ Spec II
5 out of 5 Customer Rating
$68.45
Drive Washer: 65LA Drive Washer: 65LA
3.3 out of 5 Customer Rating
$12.99
Rear Bearing: GT33 Rear Bearing: GT33
5 out of 5 Customer Rating
$9.13 Price reduced from $30.44 to
Clearance Sale!
Drive Washer: 75AX Drive Washer: 75AX
3.6 out of 5 Customer Rating
$4.13 Price reduced from $13.78 to
Clearance Sale!
Gasket Head: FS-62V Gasket Head: FS-62V
5 out of 5 Customer Rating
$6.49
Intake Manifold: FS72 Alpha Intake Manifold: FS72 Alpha
5 out of 5 Customer Rating
$7.26 Price reduced from $24.23 to
Clearance Sale!
Dust Cap Set, 7mm (3) Dust Cap Set, 7mm (3)
5 out of 5 Customer Rating
$2.96 Price reduced from $9.85 to
Clearance Sale!
Thermo Insulator: GT15 Thermo Insulator: GT15
4.5 out of 5 Customer Rating
$4.13 Price reduced from $13.78 to
Clearance Sale!
Head Gasket: GGT10 Head Gasket: GGT10
5 out of 5 Customer Rating
$3.56 Price reduced from $11.87 to
Clearance Sale!
Cylinder & Piston Assembly: O.S. Speed R2104 Cylinder & Piston Assembly: O.S. Speed R2104
3.3 out of 5 Customer Rating
$72.91 Price reduced from $243.06 to
Clearance Sale!
Mixture Control Screw #9B Mixture Control Screw #9B
4 out of 5 Customer Rating
$13.83
Dust Cap Set, 18mm (3) Dust Cap Set, 18mm (3)
3.2 out of 5 Customer Rating
$3.57 Price reduced from $11.91 to
Clearance Sale!
T-2080SC II Tuned Silencer Complete Set T-2080SC II Tuned Silencer Complete Set
4.4 out of 5 Customer Rating
$81.26 Price reduced from $270.89 to
Clearance Sale!
Carburetor Retainer: 12CV Carburetor Retainer: 12CV
4.8 out of 5 Customer Rating
$11.87