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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961-1,008 of 1,758 Results
Piston Ring: 40SF Piston Ring: 40SF
5 out of 5 Customer Rating
Piston Ring: 40SF
$26.24
Piston Pin Retainer: 61RX SX Piston Pin Retainer: 61RX SX
3.2 out of 5 Customer Rating
Piston Pin Retainer: 61RX SX
$6.45
Piston Ring: FS-61 Piston Ring: FS-61
5 out of 5 Customer Rating
Piston Ring: FS-61
$26.24
Piston Ring: 60-61 Piston Ring: 60-61
3.2 out of 5 Customer Rating
Piston Ring: 60-61
$26.24
Prop Nut 10453 10-12 Prop Nut 10453 10-12
4.4 out of 5 Customer Rating
Prop Nut 10453 10-12
$6.49
Pushrod Cover: FS-62V Pushrod Cover: FS-62V
3.6 out of 5 Customer Rating
Pushrod Cover: FS-62V
$14.84
Pushrod: 120-240 Pushrod: 120-240
5 out of 5 Customer Rating
Pushrod: 120-240
$4.20 Price reduced from $9.44 to
Clearance Sale! ⓘ
Set Screw #2D #4BK-#5B Set Screw #2D #4BK-#5B
3.6 out of 5 Customer Rating
Set Screw #2D #4BK-#5B
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Exhaust Seal Ring (10) Exhaust Seal Ring (10)
5 out of 5 Customer Rating
Exhaust Seal Ring (10)
$33.61
Slide Valve 12F2: 12XZ Speed Spec 3 Slide Valve 12F2: 12XZ Speed Spec 3
4 out of 5 Customer Rating
Slide Valve 12F2: 12XZ Speed Spec 3
$10.08 Price reduced from $33.61 to
Clearance Sale! ⓘ
Regulator Assembly: 91HZR Regulator Assembly: 91HZR
5 out of 5 Customer Rating
Regulator Assembly: 91HZR
$124.95
Rocker Arm Support Assembly FS91-240 Rocker Arm Support Assembly FS91-240
5 out of 5 Customer Rating
Rocker Arm Support Assembly FS91-240
$8.87 Price reduced from $29.55 to
Clearance Sale! ⓘ
Rocker Arm: FS115A-P Rocker Arm: FS115A-P
4.4 out of 5 Customer Rating
Rocker Arm: FS115A-P
$33.71
Rocker Arm: F61-300 Rocker Arm: F61-300
5 out of 5 Customer Rating
Rocker Arm: F61-300
$27.29
Rotation Sensor: GT33 Rotation Sensor: GT33
5 out of 5 Customer Rating
Rotation Sensor: GT33
$38.95
Rotor Stop Screw #4D Rotor Stop Screw #4D
4.4 out of 5 Customer Rating
Rotor Stop Screw #4D
$6.49
Rotor Stop Holder #2K 74 Rotor Stop Holder #2K 74
3.2 out of 5 Customer Rating
Rotor Stop Holder #2K 74
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Standoff 5x31.8mm 1-1/4" (4): GT55 Standoff 5x31.8mm 1-1/4" (4): GT55
5 out of 5 Customer Rating
Standoff 5x31.8mm 1-1/4" (4): GT55
$40.12
Standoff 5x50.8mm 2" (4): GT55 Standoff 5x50.8mm 2" (4): GT55
5 out of 5 Customer Rating
Standoff 5x50.8mm 2" (4): GT55
$48.51
Starting Shaft: 30VG ES Starting Shaft: 30VG ES
5 out of 5 Customer Rating
Starting Shaft: 30VG ES
$22.30
Rear Adapter: 18TM Rear Adapter: 18TM
3.2 out of 5 Customer Rating
Rear Adapter: 18TM
$19.05
Throttle Lever Assembly #2CK Throttle Lever Assembly #2CK
3.6 out of 5 Customer Rating
Throttle Lever Assembly #2CK
$7.49
Valve Spring Seat: FS-95V Valve Spring Seat: FS-95V
4.4 out of 5 Customer Rating
Valve Spring Seat: FS-95V
$6.49
Valve Spring Seat: 56 FS Valve Spring Seat: 56 FS
4.8 out of 5 Customer Rating
Valve Spring Seat: 56 FS
$6.45
Valve Collet: FS-120 Surpass Valve Collet: FS-120 Surpass
5 out of 5 Customer Rating
Valve Collet: FS-120 Surpass
$10.86
Venturi: 55HZ, 105HZ Venturi: 55HZ, 105HZ
4 out of 5 Customer Rating
Venturi: 55HZ, 105HZ
$22.04
Venturi: 15FP S Venturi: 15FP S
4 out of 5 Customer Rating
Venturi: 15FP S
$9.85
Woodruff Key: 61S RFH Woodruff Key: 61S RFH
5 out of 5 Customer Rating
Woodruff Key: 61S RFH
$7.46
Lock Washer 4mm Lock Washer 4mm
4.8 out of 5 Customer Rating
Lock Washer 4mm
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
Bearing R-1240ZZ Bearing R-1240ZZ
4.8 out of 5 Customer Rating
Bearing R-1240ZZ
$16.99
Bearing L-1040X2ZZ Bearing L-1040X2ZZ
5 out of 5 Customer Rating
Bearing L-1040X2ZZ
$14.99
Connector Set: OMA-50 Connector Set: OMA-50
4 out of 5 Customer Rating
Connector Set: OMA-50
$15.99
Main Shaft: OMA-2810-1250 Main Shaft: OMA-2810-1250
5 out of 5 Customer Rating
Main Shaft: OMA-2810-1250
$6.99
Propeller Shaft Set: 3805 3810 Propeller Shaft Set: 3805 3810
4.4 out of 5 Customer Rating
Propeller Shaft Set: 3805 3810
$8.39 Price reduced from $27.99 to
Clearance Sale! ⓘ
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
Stator Assembly: 5020-490 .40 Stator Assembly: 5020-490 .40
3.6 out of 5 Customer Rating
Stator Assembly: 5020-490 .40
$27.90 Price reduced from $92.99 to
Clearance Sale! ⓘ
Muffler Screws 20-46 (2) Muffler Screws 20-46 (2)
3.2 out of 5 Customer Rating
Muffler Screws 20-46 (2)
$6.49
O-Ring 1.2x54mm: GT55 O-Ring 1.2x54mm: GT55
3.6 out of 5 Customer Rating
O-Ring 1.2x54mm: GT55
$7.46
Nipple #7: FS-52 Supass Nipple #7: FS-52 Supass
5 out of 5 Customer Rating
Nipple #7: FS-52 Supass
$6.49
Dust Cap Set, 16mm (3) Dust Cap Set, 16mm (3)
5 out of 5 Customer Rating
Dust Cap Set, 16mm (3)
$11.91
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
Needle Metering 21M: 21XZ-R VII Needle Metering 21M: 21XZ-R VII
5 out of 5 Customer Rating
Needle Metering 21M: 21XZ-R VII
$17.99
Needle #40D Needle #40D
4.8 out of 5 Customer Rating
Needle #40D
$9.85
Needle #7G #7D #7H Needle #7G #7D #7H
4 out of 5 Customer Rating
Needle #7G #7D #7H
$13.78
Head Gasket 0.2T: GT22 Head Gasket 0.2T: GT22
5 out of 5 Customer Rating
Head Gasket 0.2T: GT22
$7.46
Thermo Insulator: GF40 Thermo Insulator: GF40
3.6 out of 5 Customer Rating
Thermo Insulator: GF40
$30.44
Ignition Module IG-05: GT15HZ Ignition Module IG-05: GT15HZ
4.4 out of 5 Customer Rating
Ignition Module IG-05: GT15HZ
$119.78
Head Gasket: 0.1, 0.15, T1201 Speed Head Gasket: 0.1, 0.15, T1201 Speed
3.6 out of 5 Customer Rating
Head Gasket: 0.1, 0.15, T1201 Speed
$9.55
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