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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1,518-1,565 of 1,758 Results
Mixture Control Valve #61B: 91HZ Mixture Control Valve #61B: 91HZ
4.7 out of 5 Customer Rating
Mixture Control Valve #61B: 91HZ
$29.49
Needle Valve Assembly 61H: GT15 Needle Valve Assembly 61H: GT15
3.7 out of 5 Customer Rating
Needle Valve Assembly 61H: GT15
$22.04
Piston: FS-120 Piston: FS-120
3.3 out of 5 Customer Rating
Piston: FS-120
$51.47
Piston: 61-300 Piston: 61-300
4.7 out of 5 Customer Rating
Piston: 61-300
$38.84
Piston Pin with Pads: FS30S Piston Pin with Pads: FS30S
3.9 out of 5 Customer Rating
Piston Pin with Pads: FS30S
$9.85
Piston Ring: GT60 Piston Ring: GT60
4.7 out of 5 Customer Rating
Piston Ring: GT60
$30.44
Rocker Cover,, Black: FSa-72II Rocker Cover,, Black: FSa-72II
4.1 out of 5 Customer Rating
Rocker Cover,, Black: FSa-72II
$7.65 Price reduced from $25.51 to
Clearance Sale! ⓘ
Cap Screw 4x20mm (10): GT55 Cap Screw 4x20mm (10): GT55
3.9 out of 5 Customer Rating
Cap Screw 4x20mm (10): GT55
$11.80
Thrust Washer: 20-40FP Thrust Washer: 20-40FP
5 out of 5 Customer Rating
Thrust Washer: 20-40FP
$7.99
Valve Exhaust: FS-52 Surpass Valve Exhaust: FS-52 Surpass
3.3 out of 5 Customer Rating
Valve Exhaust: FS-52 Surpass
$19.14
Security Ring: OMA-2820-950 Security Ring: OMA-2820-950
3.9 out of 5 Customer Rating
Security Ring: OMA-2820-950
$5.99
Air Funnel #60RA: FS81 Alpha Air Funnel #60RA: FS81 Alpha
5 out of 5 Customer Rating
Air Funnel #60RA: FS81 Alpha
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
Carburetor #20C: 32SX-H HX Carburetor #20C: 32SX-H HX
3.3 out of 5 Customer Rating
Carburetor #20C: 32SX-H HX
$71.61
PowerBoost Pipe: 105HZ PowerBoost Pipe: 105HZ
5 out of 5 Customer Rating
PowerBoost Pipe: 105HZ
$293.00
Long Spinner Nut 1/4"-28 Long Spinner Nut 1/4"-28
4.1 out of 5 Customer Rating
Long Spinner Nut 1/4"-28
$11.80
Crankshaft Bearing, Front: FS-91 Crankshaft Bearing, Front: FS-91
5 out of 5 Customer Rating
Crankshaft Bearing, Front: FS-91
$26.34
Front Bearing: 61FX Front Bearing: 61FX
5 out of 5 Customer Rating
Front Bearing: 61FX
$22.16
Cam Follower: Sirius 7 Cam Follower: Sirius 7
4.1 out of 5 Customer Rating
Cam Follower: Sirius 7
$6.33 Price reduced from $21.12 to
Clearance Sale! ⓘ
55HZ-R Conversion Set: 55HZ, 50SX 55HZ-R Conversion Set: 55HZ, 50SX
5 out of 5 Customer Rating
55HZ-R Conversion Set: 55HZ, 50SX
$81.31 Price reduced from $271.02 to
Clearance Sale! ⓘ
Rear Adapter: 18CV-RX Rear Adapter: 18CV-RX
5 out of 5 Customer Rating
Rear Adapter: 18CV-RX
$17.08
Induction Silencer .12/.21: INS Induction Silencer .12/.21: INS
5 out of 5 Customer Rating
Induction Silencer .12/.21: INS
$46.39
Carburetor Body: 18TM Carburetor Body: 18TM
3.1 out of 5 Customer Rating
Carburetor Body: 18TM
$46.31
Crankshaft: R2101 Speed Crankshaft: R2101 Speed
5 out of 5 Customer Rating
Crankshaft: R2101 Speed
$59.79 Price reduced from $199.31 to
Clearance Sale! ⓘ
Outer Cylinder Head: R2103 Speed Outer Cylinder Head: R2103 Speed
5 out of 5 Customer Rating
Outer Cylinder Head: R2103 Speed
$30.71 Price reduced from $102.35 to
Clearance Sale! ⓘ
Slide Valve 12F3: T1201 Speed Slide Valve 12F3: T1201 Speed
4.7 out of 5 Customer Rating
Slide Valve 12F3: T1201 Speed
$11.71 Price reduced from $39.05 to
Clearance Sale! ⓘ
Outer Head: O.S. Speed B2104 Outer Head: O.S. Speed B2104
3.1 out of 5 Customer Rating
Outer Head: O.S. Speed B2104
$31.02 Price reduced from $103.41 to
Clearance Sale! ⓘ
Carburetor 12F3: T1201 Speed Carburetor 12F3: T1201 Speed
3.1 out of 5 Customer Rating
Carburetor 12F3: T1201 Speed
$135.65
O.S. Carburetor Complete 22E(B)GT w o Reducer O.S. Carburetor Complete 22E(B)GT w o Reducer
3.3 out of 5 Customer Rating
O.S. Carburetor Complete 22E(B)GT w o Reducer
$205.96
Cylinder & Piston: T2101 Speed Cylinder & Piston: T2101 Speed
5 out of 5 Customer Rating
Cylinder & Piston: T2101 Speed
$41.44 Price reduced from $138.14 to
Clearance Sale! ⓘ
Needle 12F 11H 11K 12D Needle 12F 11H 11K 12D
5 out of 5 Customer Rating
Needle 12F 11H 11K 12D
$13.78
Speed Hex Wrench Driver 2.0mm Speed Hex Wrench Driver 2.0mm
3.3 out of 5 Customer Rating
Speed Hex Wrench Driver 2.0mm
$36.81
Carburetor Complete #40NA: 56FS Carburetor Complete #40NA: 56FS
5 out of 5 Customer Rating
Carburetor Complete #40NA: 56FS
$35.01 Price reduced from $87.19 to
Clearance Sale! ⓘ
Carburetor Complete WT1054: GT22 Carburetor Complete WT1054: GT22
5 out of 5 Customer Rating
Carburetor Complete WT1054: GT22
$184.94
Muffler Extension: 761, 871 Muffler Extension: 761, 871
5 out of 5 Customer Rating
Muffler Extension: 761, 871
$16.09
Radial Mount Screw Set: Sirius 7 Radial Mount Screw Set: Sirius 7
5 out of 5 Customer Rating
Radial Mount Screw Set: Sirius 7
$4.72 Price reduced from $15.76 to
Clearance Sale! ⓘ
Crankcase Locating Pin: Sirius 7 Crankcase Locating Pin: Sirius 7
4 out of 5 Customer Rating
Crankcase Locating Pin: Sirius 7
$6.49
Crankshaft: GT60 Crankshaft: GT60
5 out of 5 Customer Rating
Crankshaft: GT60
$58.14 Price reduced from $193.79 to
Clearance Sale! ⓘ
Silencer Gasket: F-5040, FS110A Silencer Gasket: F-5040, FS110A
5 out of 5 Customer Rating
Silencer Gasket: F-5040, FS110A
$6.49
Locknut Set: FS-91 Surpass Locknut Set: FS-91 Surpass
5 out of 5 Customer Rating
Locknut Set: FS-91 Surpass
$24.23
Needle #7G #7D #7H Needle #7G #7D #7H
4 out of 5 Customer Rating
Needle #7G #7D #7H
$13.78
Screw Metering WLA-2: GT55 Screw Metering WLA-2: GT55
4 out of 5 Customer Rating
Screw Metering WLA-2: GT55
$5.99
O-Ring S3-FKM 61H: GT15 O-Ring S3-FKM 61H: GT15
5 out of 5 Customer Rating
O-Ring S3-FKM 61H: GT15
$10.94
O-Ring 1.2x54mm: GT55 O-Ring 1.2x54mm: GT55
3.6 out of 5 Customer Rating
O-Ring 1.2x54mm: GT55
$7.46
Piston Pin: 200 Surpass Piston Pin: 200 Surpass
4.4 out of 5 Customer Rating
Piston Pin: 200 Surpass
$19.22
Piston Ring: FT-300 Piston Ring: FT-300
5 out of 5 Customer Rating
Piston Ring: FT-300
$31.52
Prop Washer: 61-90 Prop Washer: 61-90
4 out of 5 Customer Rating
Prop Washer: 61-90
$6.49
Screw Set (10): 61RX SX Screw Set (10): 61RX SX
5 out of 5 Customer Rating
Screw Set (10): 61RX SX
$13.78
Standoff 5x38.1mm 1-1/2" (4): GT55 Standoff 5x38.1mm 1-1/2" (4): GT55
3.6 out of 5 Customer Rating
Standoff 5x38.1mm 1-1/2" (4): GT55
$42.11
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