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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93-116 of 1,605 Results
TR02 Tuned Silencer Set EFRA2165 TR02 Tuned Silencer Set EFRA2165
4.7 out of 5 Customer Rating
TR02 Tuned Silencer Set EFRA2165
$227.84
Inner Head: O.S.SPEED R21GT2 Inner Head: O.S.SPEED R21GT2
4.9 out of 5 Customer Rating
Inner Head: O.S.SPEED R21GT2
$57.99
Carburetor Dust Covers: #12FB, 12XZ Speed Carburetor Dust Covers: #12FB, 12XZ Speed
5 out of 5 Customer Rating
Carburetor Dust Covers: #12FB, 12XZ Speed
$7.46
Piston Pin Retainer: RX RZ XM Piston Pin Retainer: RX RZ XM
4.7 out of 5 Customer Rating
Piston Pin Retainer: RX RZ XM
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Cylinder Head: GT15HZ Cylinder Head: GT15HZ
4.8 out of 5 Customer Rating
Cylinder Head: GT15HZ
$32.41 Price reduced from $108.03 to
Clearance Sale! ⓘ
Head Gasket: FR5 Head Gasket: FR5
3.6 out of 5 Customer Rating
Head Gasket: FR5
$11.72
Prop Washer: 40LA Prop Washer: 40LA
4.8 out of 5 Customer Rating
Prop Washer: 40LA
$6.49
Connecting Rod: BGX-3500 Connecting Rod: BGX-3500
3.2 out of 5 Customer Rating
Connecting Rod: BGX-3500
$43.99
Needle Valve Holder 61ER Needle Valve Holder 61ER
4 out of 5 Customer Rating
Needle Valve Holder 61ER
$11.80
Cover Plate: 55HZ Hyper Cover Plate: 55HZ Hyper
4.1 out of 5 Customer Rating
Cover Plate: 55HZ Hyper
$11.72
Drive Washer: GF30 Drive Washer: GF30
3.7 out of 5 Customer Rating
Drive Washer: GF30
$11.40 Price reduced from $38.03 to
Clearance Sale! ⓘ
Rocker Arm Shaft: Sirius 7 Rocker Arm Shaft: Sirius 7
3.3 out of 5 Customer Rating
Rocker Arm Shaft: Sirius 7
$9.44
Main Shaft: 3805-1200 Main Shaft: 3805-1200
3.9 out of 5 Customer Rating
Main Shaft: 3805-1200
$8.99
Crankcase: 21XZ-B Speed Spec II Crankcase: 21XZ-B Speed Spec II
4.1 out of 5 Customer Rating
Crankcase: 21XZ-B Speed Spec II
$157.70
Gasket Head, .2 Aluminum: 21XZ-R Gasket Head, .2 Aluminum: 21XZ-R
5 out of 5 Customer Rating
Gasket Head, .2 Aluminum: 21XZ-R
$6.49
Cam Cover: FS-95V Cam Cover: FS-95V
5 out of 5 Customer Rating
Cam Cover: FS-95V
$11.95
Connecting Rod: GF30 Connecting Rod: GF30
4.8 out of 5 Customer Rating
Connecting Rod: GF30
$17.36 Price reduced from $57.86 to
Clearance Sale! ⓘ
Silencer Assembly F-5040: FS110A Silencer Assembly F-5040: FS110A
3.6 out of 5 Customer Rating
Silencer Assembly F-5040: FS110A
$57.86
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
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
Crankshaft: 12XZ Speed Crankshaft: 12XZ Speed
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed
$94.99
Head Gasket: 30VG Head Gasket: 30VG
4.4 out of 5 Customer Rating
Head Gasket: 30VG
$7.46
Mixture Control Valve #10A Mixture Control Valve #10A
3.6 out of 5 Customer Rating
Mixture Control Valve #10A
$13.67
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