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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357-380 of 1,605 Results
Piston Ring: 46SF H Piston Ring: 46SF H
3.6 out of 5 Customer Rating
Piston Ring: 46SF H
$26.24
Pushrod: FS-91 Surpass Pushrod: FS-91 Surpass
3.4 out of 5 Customer Rating
Pushrod: FS-91 Surpass
$9.44
Rotor Guide Washer: 40L, 55HZ Hyper Rotor Guide Washer: 40L, 55HZ Hyper
3.2 out of 5 Customer Rating
Rotor Guide Washer: 40L, 55HZ Hyper
$3.28 Price reduced from $10.94 to
Clearance Sale! ⓘ
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
Cylinder Brass Head Gasket: 75AX Cylinder Brass Head Gasket: 75AX
5 out of 5 Customer Rating
Cylinder Brass Head Gasket: 75AX
$6.49
Connecting Rod: 50SX-H Connecting Rod: 50SX-H
4.4 out of 5 Customer Rating
Connecting Rod: 50SX-H
$25.44
Connecting Rod: FS155A-P Connecting Rod: FS155A-P
4.4 out of 5 Customer Rating
Connecting Rod: FS155A-P
$14.52 Price reduced from $48.43 to
Clearance Sale! ⓘ
Cylinder Head: 25FX Cylinder Head: 25FX
5 out of 5 Customer Rating
Cylinder Head: 25FX
$16.09
Exhaust Pipe Assembly: 40-300 Exhaust Pipe Assembly: 40-300
4.4 out of 5 Customer Rating
Exhaust Pipe Assembly: 40-300
$15.76
Front Housing: GT60 Front Housing: GT60
5 out of 5 Customer Rating
Front Housing: GT60
$87.18
Cover Plate Gasket: 55HZ Hyper Cover Plate Gasket: 55HZ Hyper
4.2 out of 5 Customer Rating
Cover Plate Gasket: 55HZ Hyper
$6.49
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
Regulator Assembly: 91HZR Regulator Assembly: 91HZR
5 out of 5 Customer Rating
Regulator Assembly: 91HZR
$124.95
Rocker Arm: F61-300 Rocker Arm: F61-300
5 out of 5 Customer Rating
Rocker Arm: F61-300
$27.29
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
Security Ring: OMA-2810 OMA-2815 Security Ring: OMA-2810 OMA-2815
5 out of 5 Customer Rating
Security Ring: OMA-2810 OMA-2815
$5.99
Mixture Control Screw #10ER Mixture Control Screw #10ER
5 out of 5 Customer Rating
Mixture Control Screw #10ER
$9.85
Crankshaft: 12XZ Speed Crankshaft: 12XZ Speed
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed
$94.99
O.S. Crankshaft OS Speed R21GT O.S. Crankshaft OS Speed R21GT
4.8 out of 5 Customer Rating
O.S. Crankshaft OS Speed R21GT
$238.82
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
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