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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1,297-1,344 of 1,758 Results
Spring Needle Adjust WLA-2: GT55 Spring Needle Adjust WLA-2: GT55
5 out of 5 Customer Rating
Spring Needle Adjust WLA-2: GT55
$10.99
O-Ring Large: FS90IIS O-Ring Large: FS90IIS
4.1 out of 5 Customer Rating
O-Ring Large: FS90IIS
$6.49
Screw Set (12): FS-26 Surpass Screw Set (12): FS-26 Surpass
3.3 out of 5 Customer Rating
Screw Set (12): FS-26 Surpass
$9.46
Crankshaft: O.S. FS-64V Crankshaft: O.S. FS-64V
4.7 out of 5 Customer Rating
Crankshaft: O.S. FS-64V
$66.99
Drive Washer: 120AX Drive Washer: 120AX
5 out of 5 Customer Rating
Drive Washer: 120AX
$8.19 Price reduced from $27.29 to
Clearance Sale! ⓘ
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! ⓘ
Connecting Rod: GT22 Connecting Rod: GT22
5 out of 5 Customer Rating
Connecting Rod: GT22
$17.36 Price reduced from $57.87 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
Thrust Washer: FT-120 160 Thrust Washer: FT-120 160
5 out of 5 Customer Rating
Thrust Washer: FT-120 160
$6.49
Bearing R-1560X2ZZ Bearing R-1560X2ZZ
4 out of 5 Customer Rating
Bearing R-1560X2ZZ
$17.99
Prop Shaft: OMA-38 Series Prop Shaft: OMA-38 Series
5 out of 5 Customer Rating
Prop Shaft: OMA-38 Series
$27.99
Carburetor Rotor 70T2: GF30 II Carburetor Rotor 70T2: GF30 II
4 out of 5 Customer Rating
Carburetor Rotor 70T2: GF30 II
$63.12
Extension Adapter E-4011 Extension Adapter E-4011
5 out of 5 Customer Rating
Extension Adapter E-4011
$10.42 Price reduced from $34.76 to
Clearance Sale! ⓘ
Muffler #892: 25SF Muffler #892: 25SF
4 out of 5 Customer Rating
Muffler #892: 25SF
$15.09 Price reduced from $29.49 to
Clearance Sale! ⓘ
Carburetor Rotor: 56 FS Carburetor Rotor: 56 FS
4.4 out of 5 Customer Rating
Carburetor Rotor: 56 FS
$8.88 Price reduced from $29.60 to
Clearance Sale! ⓘ
Crankshaft: 20-25FP Crankshaft: 20-25FP
5 out of 5 Customer Rating
Crankshaft: 20-25FP
$28.59
Cylinder Liner: FS-70 Surpass Cylinder Liner: FS-70 Surpass
4.4 out of 5 Customer Rating
Cylinder Liner: FS-70 Surpass
$35.48
Manifold Seal: FT-120-300 Manifold Seal: FT-120-300
3.6 out of 5 Customer Rating
Manifold Seal: FT-120-300
$11.84
Manifold Nut M9 Manifold Nut M9
3.6 out of 5 Customer Rating
Manifold Nut M9
$6.49
Needle Valve Assembly: #60B Needle Valve Assembly: #60B
3.6 out of 5 Customer Rating
Needle Valve Assembly: #60B
$22.30
Mid Needle Valve Assebly: 61ER, 941HZ-R Mid Needle Valve Assebly: 61ER, 941HZ-R
3.6 out of 5 Customer Rating
Mid Needle Valve Assebly: 61ER, 941HZ-R
$22.30
Piston: FS-40 Surpass Piston: FS-40 Surpass
5 out of 5 Customer Rating
Piston: FS-40 Surpass
$25.29
Piston Pin Retainer: 61RX SX Piston Pin Retainer: 61RX SX
3.2 out of 5 Customer Rating
Piston Pin Retainer: 61RX SX
$6.45
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! ⓘ
Cap Screw 5x25mm (10): GT55 Cap Screw 5x25mm (10): GT55
5 out of 5 Customer Rating
Cap Screw 5x25mm (10): GT55
$13.78
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
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! ⓘ
Inner Head O-Ring O.S. T1204 (S30-FKM) Inner Head O-Ring O.S. T1204 (S30-FKM)
5 out of 5 Customer Rating
Inner Head O-Ring O.S. T1204 (S30-FKM)
$9.89
Carburetor 21M2-B: Speed R2101 Carburetor 21M2-B: Speed R2101
3.4 out of 5 Customer Rating
Carburetor 21M2-B: Speed R2101
$152.36
Carburetor Body: #21C Carburetor Body: #21C
5 out of 5 Customer Rating
Carburetor Body: #21C
$24.00 Price reduced from $79.99 to
Clearance Sale! ⓘ
Crankcase: R21 Crankcase: R21
4 out of 5 Customer Rating
Crankcase: R21
$136.57
Crankshaft: 12XZ Speed Spec II Crankshaft: 12XZ Speed Spec II
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed Spec II
$35.99 Price reduced from $119.97 to
Clearance Sale! ⓘ
RP8 Turbo Glow Plug, On-Road, Cold RP8 Turbo Glow Plug, On-Road, Cold
4.8 out of 5 Customer Rating
RP8 Turbo Glow Plug, On-Road, Cold
$15.99
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