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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1,561-1,584 of 1,605 Results
Dust Cap Set, 10mm (3) Dust Cap Set, 10mm (3)
4.4 out of 5 Customer Rating
$2.96 Price reduced from $9.85 to
Clearance Sale!
Crankshaft Ball Bearing, Rear: Speed 21 V-Spec Crankshaft Ball Bearing, Rear: Speed 21 V-Spec
4.5 out of 5 Customer Rating
$35.93 Price reduced from $119.78 to
Clearance Sale!
Gasket Set: FS-91-P Gasket Set: FS-91-P
5 out of 5 Customer Rating
$10.94
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!
Carburetor Body: #60LH, 50SX-H Carburetor Body: #60LH, 50SX-H
4.5 out of 5 Customer Rating
$14.52 Price reduced from $48.41 to
Clearance Sale!
Connecting Rod: FS-95V Connecting Rod: FS-95V
5 out of 5 Customer Rating
$9.13 Price reduced from $30.44 to
Clearance Sale!
Crankcase: 21XZ-B Speed Crankcase: 21XZ-B Speed
5 out of 5 Customer Rating
$139.99
Rocker Arm Support Assembly FS91-240 Rocker Arm Support Assembly FS91-240
5 out of 5 Customer Rating
$8.87 Price reduced from $29.55 to
Clearance Sale!
O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT
3.3 out of 5 Customer Rating
$89.58 Price reduced from $298.61 to
Clearance Sale!
Motor Mount: OMA-28 Series Motor Mount: OMA-28 Series
3.9 out of 5 Customer Rating
$8.99
Muffler Body: 120Surpass Muffler Body: 120Surpass
5 out of 5 Customer Rating
$40.12
Crankshaft: 37SZ-H Crankshaft: 37SZ-H
5 out of 5 Customer Rating
$15.23 Price reduced from $50.76 to
Clearance Sale!
Crankshaft: 70SZ-H Crankshaft: 70SZ-H
3.3 out of 5 Customer Rating
$20.40 Price reduced from $67.99 to
Clearance Sale!
Piston Ring: 56 FS Piston Ring: 56 FS
3.6 out of 5 Customer Rating
$8.85 Price reduced from $29.49 to
Clearance Sale!
Venturi #61N: FS72A Venturi #61N: FS72A
4.4 out of 5 Customer Rating
$5.74 Price reduced from $19.14 to
Clearance Sale!
Cylinder & Piston Assembly: 28XZ Cylinder & Piston Assembly: 28XZ
4.1 out of 5 Customer Rating
$52.97 Price reduced from $176.55 to
Clearance Sale!
M11 In-Cowl Exhaust Header Pipe Side 60D: FS72A M11 In-Cowl Exhaust Header Pipe Side 60D: FS72A
3.3 out of 5 Customer Rating
$42.23
Head Gasket: 28XZ Head Gasket: 28XZ
3.6 out of 5 Customer Rating
$2.24 Price reduced from $7.46 to
Clearance Sale!
Intake Manifold: FS-120II Intake Manifold: FS-120II
3.6 out of 5 Customer Rating
$8.85 Price reduced from $29.49 to
Clearance Sale!
Carburetor: GT33 Carburetor: GT33
4.8 out of 5 Customer Rating
$105.03 Price reduced from $190.20 to
Clearance Sale!
M16 In-Cowl Exhaust Header Pipe Side 60D: FS20S M16 In-Cowl Exhaust Header Pipe Side 60D: FS20S
5 out of 5 Customer Rating
$14.55 Price reduced from $48.51 to
Clearance Sale!
Muffler #892: 25SF Muffler #892: 25SF
4 out of 5 Customer Rating
$15.09 Price reduced from $29.49 to
Clearance Sale!
Nozzle Assembly: FL-70 Nozzle Assembly: FL-70
3.6 out of 5 Customer Rating
$21.10
Screw Set (8): 25LA Screw Set (8): 25LA
3.2 out of 5 Customer Rating
$8.43