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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1,009-1,056 of 1,758 Results
Gasket Set: FS-120 II Gasket Set: FS-120 II
5 out of 5 Customer Rating
Gasket Set: FS-120 II
$10.94
Carburetor Gasket Set: WLA-2 (3) Carburetor Gasket Set: WLA-2 (3)
4 out of 5 Customer Rating
Carburetor Gasket Set: WLA-2 (3)
$5.15 Price reduced from $17.16 to
Clearance Sale! ⓘ
Piston Pin Retainer: GT15HZ Piston Pin Retainer: GT15HZ
5 out of 5 Customer Rating
Piston Pin Retainer: GT15HZ
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Piston: 55HZ Hyper Piston: 55HZ Hyper
3.6 out of 5 Customer Rating
Piston: 55HZ Hyper
$44.22
Thermo Insulator: GT15HZ Thermo Insulator: GT15HZ
4.8 out of 5 Customer Rating
Thermo Insulator: GT15HZ
$10.94
Thermo Insulator: 21B, 40E, 70C Carb Thermo Insulator: 21B, 40E, 70C Carb
5 out of 5 Customer Rating
Thermo Insulator: 21B, 40E, 70C Carb
$17.99
Cylinder Head: GT22 Cylinder Head: GT22
4 out of 5 Customer Rating
Cylinder Head: GT22
$52.73
Cylinder Head: GGT10 Cylinder Head: GGT10
4.8 out of 5 Customer Rating
Cylinder Head: GGT10
$8.87 Price reduced from $29.55 to
Clearance Sale! ⓘ
Cylinder Liner: FS-70 Surpass Cylinder Liner: FS-70 Surpass
4.4 out of 5 Customer Rating
Cylinder Liner: FS-70 Surpass
$35.48
Cylinder Liner: 120 240 Cylinder Liner: 120 240
4 out of 5 Customer Rating
Cylinder Liner: 120 240
$15.77 Price reduced from $52.57 to
Clearance Sale! ⓘ
Cylinder Liner: GT15HZ Cylinder Liner: GT15HZ
5 out of 5 Customer Rating
Cylinder Liner: GT15HZ
$105.05
Drive Shaft Bearing: Sirius 7 Drive Shaft Bearing: Sirius 7
5 out of 5 Customer Rating
Drive Shaft Bearing: Sirius 7
$7.30 Price reduced from $24.36 to
Clearance Sale! ⓘ
Drive Washer: 46AXII Drive Washer: 46AXII
3.6 out of 5 Customer Rating
Drive Washer: 46AXII
$13.83
Drive Washer: 160FX Drive Washer: 160FX
5 out of 5 Customer Rating
Drive Washer: 160FX
$27.29
Cylinder Liner: FR5 Cylinder Liner: FR5
4 out of 5 Customer Rating
Cylinder Liner: FR5
$15.79 Price reduced from $45.22 to
Clearance Sale! ⓘ
Drive Washer: FS72 Alpha Drive Washer: FS72 Alpha
4 out of 5 Customer Rating
Drive Washer: FS72 Alpha
$19.05
Dust Cap Set: RZ-V P Dust Cap Set: RZ-V P
5 out of 5 Customer Rating
Dust Cap Set: RZ-V P
$7.46
Exhaust Gasket: 21RZ Exhaust Gasket: 21RZ
4.4 out of 5 Customer Rating
Exhaust Gasket: 21RZ
$13.78
Exhaust Pipe Assembly: 40-300 Exhaust Pipe Assembly: 40-300
4.4 out of 5 Customer Rating
Exhaust Pipe Assembly: 40-300
$15.76
Exhaust Gasket: GT22 Exhaust Gasket: GT22
4.4 out of 5 Customer Rating
Exhaust Gasket: GT22
$3.28 Price reduced from $10.94 to
Clearance Sale! ⓘ
Ignition Module IG-06: GT15 Ignition Module IG-06: GT15
3.6 out of 5 Customer Rating
Ignition Module IG-06: GT15
$97.70
Exhaust Pipe Nut: F90-240 Exhaust Pipe Nut: F90-240
4.4 out of 5 Customer Rating
Exhaust Pipe Nut: F90-240
$6.49
Head Gasket: 28XZ Head Gasket: 28XZ
3.6 out of 5 Customer Rating
Head Gasket: 28XZ
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Intake Pipe AS-L: FT-120 and FT-160 Intake Pipe AS-L: FT-120 and FT-160
5 out of 5 Customer Rating
Intake Pipe AS-L: FT-120 and FT-160
$22.30
Piston: FS-91 Surpass FT-160 Piston: FS-91 Surpass FT-160
3.6 out of 5 Customer Rating
Piston: FS-91 Surpass FT-160
$44.22
Piston: GT55 Piston: GT55
5 out of 5 Customer Rating
Piston: GT55
$72.99
Outer Head: 21XZ-R Outer Head: 21XZ-R
4.8 out of 5 Customer Rating
Outer Head: 21XZ-R
$69.99
Cylinder Head: 140RX Cylinder Head: 140RX
5 out of 5 Customer Rating
Cylinder Head: 140RX
$71.53
Link Rod: FR5 Link Rod: FR5
3.6 out of 5 Customer Rating
Link Rod: FR5
$9.81 Price reduced from $27.56 to
Clearance Sale! ⓘ
Locknut Set: FS-91 Surpass Locknut Set: FS-91 Surpass
5 out of 5 Customer Rating
Locknut Set: FS-91 Surpass
$24.23
Needle: #60B Needle: #60B
5 out of 5 Customer Rating
Needle: #60B
$14.73
Cover Plate Gasket: 55HZ Hyper Cover Plate Gasket: 55HZ Hyper
4.2 out of 5 Customer Rating
Cover Plate Gasket: 55HZ Hyper
$6.49
Under Cover Gasket: IL-300 Dia-Star Under Cover Gasket: IL-300 Dia-Star
5 out of 5 Customer Rating
Under Cover Gasket: IL-300 Dia-Star
$8.49
Piston Pin: 50SX-H Piston Pin: 50SX-H
3.6 out of 5 Customer Rating
Piston Pin: 50SX-H
$11.72
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! ⓘ
Cylinder Jacket: FT-160 Cylinder Jacket: FT-160
4 out of 5 Customer Rating
Cylinder Jacket: FT-160
$70.37
Cylinder Liner: 50SX-H Cylinder Liner: 50SX-H
3.6 out of 5 Customer Rating
Cylinder Liner: 50SX-H
$58.90
Cylinder Liner: 56 FS Cylinder Liner: 56 FS
3.6 out of 5 Customer Rating
Cylinder Liner: 56 FS
$9.03 Price reduced from $30.10 to
Clearance Sale! ⓘ
Mixture Control Valve #70A:1.40RX Mixture Control Valve #70A:1.40RX
5 out of 5 Customer Rating
Mixture Control Valve #70A:1.40RX
$25.44
Mixture Control Valve 61H: GT15 Mixture Control Valve 61H: GT15
4.4 out of 5 Customer Rating
Mixture Control Valve 61H: GT15
$26.24
Needle Assembly #7H #7F Needle Assembly #7H #7F
4.4 out of 5 Customer Rating
Needle Assembly #7H #7F
$22.04
Needle Valve Assembly #11H #11HB Needle Valve Assembly #11H #11HB
3.6 out of 5 Customer Rating
Needle Valve Assembly #11H #11HB
$27.29
O.S. Thermo Insulator 21J3 O.S. Thermo Insulator 21J3
3.4 out of 5 Customer Rating
O.S. Thermo Insulator 21J3
$14.99
Drive Washer: T-120 160 Drive Washer: T-120 160
5 out of 5 Customer Rating
Drive Washer: T-120 160
$10.50 Price reduced from $29.60 to
Clearance Sale! ⓘ
Mixture Control Valve: 46AXII Mixture Control Valve: 46AXII
4.4 out of 5 Customer Rating
Mixture Control Valve: 46AXII
$30.44
Mixture Control Vavle Assembly 70T: GF30 Mixture Control Vavle Assembly 70T: GF30
5 out of 5 Customer Rating
Mixture Control Vavle Assembly 70T: GF30
$27.29
Metering Needle 21M Metering Needle 21M
4.4 out of 5 Customer Rating
Metering Needle 21M
$19.14
Mixture Control Valve 21M Mixture Control Valve 21M
5 out of 5 Customer Rating
Mixture Control Valve 21M
$19.05
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