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  3. OS Engines

O.S. Engines

O.S. Engines

Quality and performance has made O.S. the standard in RC engines for over 80 years.

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577-672 of 1771 Results

    Carburetor Dust Covers: #12FB, 12XZ Speed

    Carburetor Dust Covers: #12FB, 12XZ Speed

    $7.46
    Needle Valve Assembly #12FB: 12XZ Speed

    Needle Valve Assembly #12FB: 12XZ Speed

    $27.29
    Piston Pin Retainer: RX RZ XM

    Piston Pin Retainer: RX RZ XM

    $6.49
    Crankshaft: O.S. Speed B2104

    Crankshaft: O.S. Speed B2104

    $237.99
    Connecting Rod: R2102, Speed 21XZ-GT

    Connecting Rod: R2102, Speed 21XZ-GT

    $52.58
    O.S. Crankcase Speed: T1203

    O.S. Crankcase Speed: T1203

    $79.99
    Cylinder Rebuild Kit: 21XZ-B Speed Spec III

    Cylinder Rebuild Kit: 21XZ-B Speed Spec III

    $221.55
    Cylinder Rebuild Kit: 21XR-B

    Cylinder Rebuild Kit: 21XR-B

    $149.93
    O.S. Inner Head with O-Ring Speed B2103 Type R & S

    O.S. Inner Head with O-Ring Speed B2103 Type R & S

    $57.75
    Needle Holder #20E

    Needle Holder #20E

    $16.09
    Metering Needle Assembly: 21VG

    Metering Needle Assembly: 21VG

    $16.99
    Valve Spring: FS-26S-C

    Valve Spring: FS-26S-C

    $6.49
    Outer Head: O.S. Speed B2104

    Outer Head: O.S. Speed B2104

    $103.41
    O.S. Carburetor Complete 22E(B)GT w o Reducer

    O.S. Carburetor Complete 22E(B)GT w o Reducer

    $205.96
    O.S. Crankcase Speed B2103 Type S & Type R

    O.S. Crankcase Speed B2103 Type S & Type R

    $147.19
    Needle 12F 11H 11K 12D

    Needle 12F 11H 11K 12D

    $13.78
    Carburetor Complete #40NA: 56FS

    Carburetor Complete #40NA: 56FS

    $87.19
    Carburetor Complete WT1054: GT22

    Carburetor Complete WT1054: GT22

    $184.94
    Carburetor Body: #10G

    Carburetor Body: #10G

    $17.16
    Connecting Rod: GT22

    Connecting Rod: GT22

    $57.87
    Cover Plate: 46AXII

    Cover Plate: 46AXII

    $11.80
    Cover Plate: 35AX

    Cover Plate: 35AX

    $11.80
    Crankcase Locating Pin: Sirius 7

    Crankcase Locating Pin: Sirius 7

    $6.49
    Crankshaft: FS-52

    Crankshaft: FS-52

    $47.99
    Crankshaft: GT60

    Crankshaft: GT60

    $193.79
    Cylinder Head: 120AX

    Cylinder Head: 120AX

    $57.78
    Silencer Gasket: F-5040, FS110A

    Silencer Gasket: F-5040, FS110A

    $6.49
    Head Gasket: 25LA

    Head Gasket: 25LA

    $6.49
    Mixture Control Screw #9B

    Mixture Control Screw #9B

    $13.83
    Silencer Assembly Screws: #F-6010 FS-200S

    Silencer Assembly Screws: #F-6010 FS-200S

    $9.85
    Needle #7G #7D #7H

    Needle #7G #7D #7H

    $13.78
    Screw Metering WLA-2: GT55

    Screw Metering WLA-2: GT55

    $5.99
    O-Ring S3-FKM 61H: GT15

    O-Ring S3-FKM 61H: GT15

    $10.94
    Piston Pin Retainer: 50SX-H

    Piston Pin Retainer: 50SX-H

    $7.46
    Piston: FS110A

    Piston: FS110A

    $48.51
    Piston Ring: 91FX
    2.5(2)

    Piston Ring: 91FX

    $26.24
    Prop Washer: 61-90
    5(1)

    Prop Washer: 61-90

    $6.49
    Screw Set (10): 61RX SX

    Screw Set (10): 61RX SX

    $13.78
    Screw Set (34): FT-120 (34)
    4(1)

    Screw Set (34): FT-120 (34)

    $25.44
    Valve In Ex: 90-320

    Valve In Ex: 90-320

    $36.85
    Bearing R-1560X2ZZ

    Bearing R-1560X2ZZ

    $17.99
    Prop Shaft: OMA-38 Series

    Prop Shaft: OMA-38 Series

    $27.99
    Carburetor Rotor 70T2: GF30 II

    Carburetor Rotor 70T2: GF30 II

    $63.12
    Extension Adapter E-4011

    Extension Adapter E-4011

    $34.76
    Muffler #892: 25SF

    Muffler #892: 25SF

    $29.49
    Cam Gear: Sirius 7

    Cam Gear: Sirius 7

    $52.66
    Carburetor Rotor: 56 FS

    Carburetor Rotor: 56 FS

    $29.60
    Connecting Rod: 37SZ-H

    Connecting Rod: 37SZ-H

    $22.04
    Crankshaft: 55AX

    Crankshaft: 55AX

    $55.12
    Cylinder Liner: 50SX-H

    Cylinder Liner: 50SX-H

    $37.47
    Cylinder Liner: FS-70 Surpass

    Cylinder Liner: FS-70 Surpass

    $35.48
    Exhaust Joint Nut: FS-120 Surpass
    5(1)

    Exhaust Joint Nut: FS-120 Surpass

    $8.49
    Manifold Seal: FT-120-300

    Manifold Seal: FT-120-300

    $11.84
    Manifold Nut M9
    4(1)

    Manifold Nut M9

    $6.49
    Needle Holder FT-120-300

    Needle Holder FT-120-300

    $11.80
    Needle Valve Assembly: #60B

    Needle Valve Assembly: #60B

    $22.30
    Mid Needle Valve Assebly: 61ER, 941HZ-R

    Mid Needle Valve Assebly: 61ER, 941HZ-R

    $22.30
    Piston Pin Retainer: 61RX SX

    Piston Pin Retainer: 61RX SX

    $6.45
    Rear Housing: GT60

    Rear Housing: GT60

    $87.18
    Rocker Cover: 120 Surpass

    Rocker Cover: 120 Surpass

    $14.73
    Rocker Cover: FF-240 320

    Rocker Cover: FF-240 320

    $22.24
    Cap Screw 5x25mm (10): GT55

    Cap Screw 5x25mm (10): GT55

    $13.78
    Throttle Arm Assembly WLA-2: GT55

    Throttle Arm Assembly WLA-2: GT55

    $7.46
    Heat Sink Head: 91SX-H

    Heat Sink Head: 91SX-H

    $57.99
    Motor Mount: 15LA
    5(2)

    Motor Mount: 15LA

    $22.26
    Powerboost Pipe: III 50, 55HZ-H
    5(1)

    Powerboost Pipe: III 50, 55HZ-H

    $184.86
    Bearing Rear: 65AX

    Bearing Rear: 65AX

    $22.16
    Rear Bearing: 108-160
    4(1)

    Rear Bearing: 108-160

    $26.34
    Cam Holder: Sirius 7

    Cam Holder: Sirius 7

    $48.41
    Cam Cover: FS-40 Surpass

    Cam Cover: FS-40 Surpass

    $9.44
    Carburetor Screw: #103A2A
    5(2)

    Carburetor Screw: #103A2A

    $6.49
    Connecting Rod Plate: GGT10

    Connecting Rod Plate: GGT10

    $22.26
    Cover Plate: 56 FS

    Cover Plate: 56 FS

    $15.76
    Back Plate Parallel Pin: Sirius 7

    Back Plate Parallel Pin: Sirius 7

    $6.49
    Cover Plate: 91SZ-H

    Cover Plate: 91SZ-H

    $20.99
    Crankcase: GGT10

    Crankcase: GGT10

    $104.09
    Crankshaft: 25AX

    Crankshaft: 25AX

    $43.99
    Cylinder Head: FS81 Alpha

    Cylinder Head: FS81 Alpha

    $76.86
    Cylinder Head: FS155A-P

    Cylinder Head: FS155A-P

    $114.61
    Cylinder Head: GT15

    Cylinder Head: GT15

    $52.69
    Cylinder Jacket: IL-300 Dia-Star

    Cylinder Jacket: IL-300 Dia-Star

    $162.95
    Drive Spacer: GT33

    Drive Spacer: GT33

    $44.22
    Cylinder Liner: 140RX

    Cylinder Liner: 140RX

    $106.01
    Cylinder Liner: FS72 Alpha

    Cylinder Liner: FS72 Alpha

    $43.02
    Drive Hub: 140RX

    Drive Hub: 140RX

    $26.24
    Drive Spacer: GT60

    Drive Spacer: GT60

    $38.03
    Gasket Set: 50SX-H

    Gasket Set: 50SX-H

    $8.43
    Carburetor Spacer: Sirius 7

    Carburetor Spacer: Sirius 7

    $10.86
    Intake Cam: Sirius 7

    Intake Cam: Sirius 7

    $70.37
    Link Pin: Sirius 7

    Link Pin: Sirius 7

    $11.80
    Locknut: GT33

    Locknut: GT33

    $17.16
    Muffler Assembly Screw: 75AX

    Muffler Assembly Screw: 75AX

    $8.43
    Needle 25 2SX: 61FX

    Needle 25 2SX: 61FX

    $13.78
    Needle Valve Assembly: #61B, 91HZ

    Needle Valve Assembly: #61B, 91HZ

    $22.30
    Main Needle Valve Assembly: 61ER

    Main Needle Valve Assembly: 61ER

    $22.30
    Piston: GF30

    Piston: GF30

    $57.86

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