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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433-456 of 1,755 Results
Connecting Rod: 56 FS Connecting Rod: 56 FS
3.2 out of 5 Customer Rating
Connecting Rod: 56 FS
$22.04
Connecting Rod: 91SX-H Complete Connecting Rod: 91SX-H Complete
5 out of 5 Customer Rating
Connecting Rod: 91SX-H Complete
$27.48
Pushrod Cover O-Ring: 56 FS Pushrod Cover O-Ring: 56 FS
4.8 out of 5 Customer Rating
Pushrod Cover O-Ring: 56 FS
$6.49
Cover Plate: 55AX Cover Plate: 55AX
3.4 out of 5 Customer Rating
Cover Plate: 55AX
$17.16
Cover Plate: FL-70 Cover Plate: FL-70
5 out of 5 Customer Rating
Cover Plate: FL-70
$9.99
Cylinder & Piston Assembly: 75AX Cylinder & Piston Assembly: 75AX
4.4 out of 5 Customer Rating
Cylinder & Piston Assembly: 75AX
$138.19
Gasket Set: 91FX Gasket Set: 91FX
5 out of 5 Customer Rating
Gasket Set: 91FX
$8.43
Link Pin E-Ring: Sirius 7 Link Pin E-Ring: Sirius 7
4.4 out of 5 Customer Rating
Link Pin E-Ring: Sirius 7
$6.49
Needle Valve Assembly: 91SZ-H Hyper Needle Valve Assembly: 91SZ-H Hyper
5 out of 5 Customer Rating
Needle Valve Assembly: 91SZ-H Hyper
$29.60
Piston: FS-95V Piston: FS-95V
5 out of 5 Customer Rating
Piston: FS-95V
$48.43
Piston Ring: 32FH Piston Ring: 32FH
5 out of 5 Customer Rating
Piston Ring: 32FH
$26.24
Rotor Gear Screw: 30Wankel Rotor Gear Screw: 30Wankel
5 out of 5 Customer Rating
Rotor Gear Screw: 30Wankel
$13.83
Head Gasket: 21TM Head Gasket: 21TM
4 out of 5 Customer Rating
Head Gasket: 21TM
$9.74
Cylinder Piston Rod Set: O.S. Speed B2104 Cylinder Piston Rod Set: O.S. Speed B2104
3.4 out of 5 Customer Rating
Cylinder Piston Rod Set: O.S. Speed B2104
$242.95
Cover Plate: O.S. Speed B2104 Cover Plate: O.S. Speed B2104
4.2 out of 5 Customer Rating
Cover Plate: O.S. Speed B2104
$28.35
Crankcase: 21XZ-B Crankcase: 21XZ-B
4.8 out of 5 Customer Rating
Crankcase: 21XZ-B
$124.99
Outer Head: T1201 Speed Outer Head: T1201 Speed
5 out of 5 Customer Rating
Outer Head: T1201 Speed
$30.73 Price reduced from $102.46 to
Clearance Sale! ⓘ
Carburetor Body: 21J3 Carburetor Body: 21J3
4 out of 5 Customer Rating
Carburetor Body: 21J3
$97.70
Carburetor Rotor: #11J Carburetor Rotor: #11J
5 out of 5 Customer Rating
Carburetor Rotor: #11J
$29.60
Connecting Rod: 21XR-B Version II Connecting Rod: 21XR-B Version II
4.8 out of 5 Customer Rating
Connecting Rod: 21XR-B Version II
$29.56
O.S. Crankshaft Speed B2103 Type S & Type R O.S. Crankshaft Speed B2103 Type S & Type R
4.8 out of 5 Customer Rating
O.S. Crankshaft Speed B2103 Type S & Type R
$193.70
Gasket Head, .1 Brass: 21XZ-R Gasket Head, .1 Brass: 21XZ-R
3.6 out of 5 Customer Rating
Gasket Head, .1 Brass: 21XZ-R
$6.49
Crankshaft: FS72 Alpha Crankshaft: FS72 Alpha
3.7 out of 5 Customer Rating
Crankshaft: FS72 Alpha
$74.90
Cylinder Liner: 37SZ-H Cylinder Liner: 37SZ-H
3.3 out of 5 Customer Rating
Cylinder Liner: 37SZ-H
$38.67
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