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FATHER'S DAY GIFT GUIDE

Find the perfect RC gift for Dad!

WE BOUGHT BIG, YOU SAVE BIGGER

Save Up To $75!

CLEARANCE SALE

Save Big While Supplies Last

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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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36

$500 or more

26

276-371 of 1812 Results

    Locknut Set: FS-91 Surpass
    5(2)

    Locknut Set: FS-91 Surpass

    $24.23
    Exhaust Seal O-Ring (2)

    Exhaust Seal O-Ring (2)

    $13.78
    Throttle Arm Assembly: 40L, 55HZ Hyper

    Throttle Arm Assembly: 40L, 55HZ Hyper

    $7.46
    Thrust Washer: FT-120 160
    5(1)

    Thrust Washer: FT-120 160

    $6.49
    Thrust Washer: 120Surpass

    Thrust Washer: 120Surpass

    $6.49
    Valve Spring: FS-70 91SII

    Valve Spring: FS-70 91SII

    $6.49
    Prop Washer: 20-40

    Prop Washer: 20-40

    $6.49
    Throttle Lever #1A-#3A
    5(4)

    Throttle Lever #1A-#3A

    $6.49
    Carburetor: #11K Slide, 18TZ, 21TM
    5(4)

    Carburetor: #11K Slide, 18TZ, 21TM

    $96.66
    Muffler Mounting Screws #873 (2)
    5(3)

    Muffler Mounting Screws #873 (2)

    $6.49
    Standoff 5x50.8mm 2" (4): GT55

    Standoff 5x50.8mm 2" (4): GT55

    $48.51
    #10 A5 Glow Plug Cold Air
    5(1)

    #10 A5 Glow Plug Cold Air

    $13.99
    Ratchet Spring #7H #7D #2K
    5(3)

    Ratchet Spring #7H #7D #2K

    $6.49
    Pushrod Cover Assembly: FT-120-240

    Pushrod Cover Assembly: FT-120-240

    $21.10
    Bubbleless Clunk
    4.5(2)

    Bubbleless Clunk

    $21.04
    Gasket Head, .2mm: 105HZ

    Gasket Head, .2mm: 105HZ

    $7.46
    P3 Turbo Glow Plug V-Spec Ultra Hot Off-Road
    5(2)

    P3 Turbo Glow Plug V-Spec Ultra Hot Off-Road

    $14.99
    Valve Spring: F90 160

    Valve Spring: F90 160

    $6.49
    Header Pipe Spring

    Header Pipe Spring

    $11.80
    Needle #40D
    5(1)

    Needle #40D

    $9.85
    Valve Adjustment Kit: 4-Stroke
    5(6)

    Valve Adjustment Kit: 4-Stroke

    $15.78
    O.S. Dust Cover 21E 21F 22D 22J

    O.S. Dust Cover 21E 21F 22D 22J

    $11.91
    Ignition Module IG-02: GT33

    Ignition Module IG-02: GT33

    $104.01
    Muffler Extension 35mm: E-402

    Muffler Extension 35mm: E-402

    $22.26
    Piston Ring: 91FX
    2.5(2)

    Piston Ring: 91FX

    $26.24
    Fuel Inlet Nipple: 12-240

    Fuel Inlet Nipple: 12-240

    $6.49
    Woodruff Key: 61-91
    5(3)

    Woodruff Key: 61-91

    $6.45
    Muffler Extension: 120AX

    Muffler Extension: 120AX

    $26.24
    Muffler #871: 10-15

    Muffler #871: 10-15

    $22.04
    Spinner Nut: 60-91

    Spinner Nut: 60-91

    $15.78
    Type F Glow Plug Medium: Four Stroke
    4.8(14)

    Type F Glow Plug Medium: Four Stroke

    $13.99
    #8 Glow Plug Long Medium Air Car
    4.8(34)

    #8 Glow Plug Long Medium Air Car

    $11.99
    Motor Mount: 46, 55AX
    5(5)

    Motor Mount: 46, 55AX

    $34.86
    O-Ring Needle: FS/FX/LA
    4.8(8)

    O-Ring Needle: FS/FX/LA

    $8.49
    105HZ 1.05 Helicopter Engine
    5(1)

    105HZ 1.05 Helicopter Engine

    $649.99
    Carburetor Reducer 8.5mm, Purple: 21M

    Carburetor Reducer 8.5mm, Purple: 21M

    $21.10
    Cover Plate: 28XZ

    Cover Plate: 28XZ

    $22.26
    Crankcase: 19XZ-B Speed

    Crankcase: 19XZ-B Speed

    $157.70
    Crankshaft: 12TG-P

    Crankshaft: 12TG-P

    $50.83
    Crankshaft: 21 Speed V-Spec

    Crankshaft: 21 Speed V-Spec

    $174.99
    Inner Head: T1201 Speed

    Inner Head: T1201 Speed

    $37.99
    O.S. Outer Head Speed: T1203

    O.S. Outer Head Speed: T1203

    $89.99
    O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT

    O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT

    $298.61
    Inner Head: 12XZ Speed

    Inner Head: 12XZ Speed

    $30.99
    Gasket Set: 12TG

    Gasket Set: 12TG

    $10.94
    Pan Head Screw +3.0X12 (10)

    Pan Head Screw +3.0X12 (10)

    $9.53
    Carburetor Assemblyy Screw WLA-2: GT55

    Carburetor Assemblyy Screw WLA-2: GT55

    $5.99
    90 Degree In-Cowl Header: FS110A

    90 Degree In-Cowl Header: FS110A

    $36.85
    Intake Manifold 200 Surpass

    Intake Manifold 200 Surpass

    $34.86
    Motor Mount: 15CV-A, 10LA

    Motor Mount: 15CV-A, 10LA

    $25.44
    Camshaft: FS72 Alpha

    Camshaft: FS72 Alpha

    $54.63
    Front Bearing: 90-300

    Front Bearing: 90-300

    $22.16
    Connecting Rod: FS-120 SP

    Connecting Rod: FS-120 SP

    $40.12
    Connecting Rod Bearing: GGT10

    Connecting Rod Bearing: GGT10

    $25.44
    Connecting Rod: GF40

    Connecting Rod: GF40

    $70.40
    Back Plate: Sirius 7

    Back Plate: Sirius 7

    $466.21
    Crankcase: 65AX

    Crankcase: 65AX

    $114.52
    Crankcase: GT15

    Crankcase: GT15

    $125.03
    Crankpin Stop Screw: GT60

    Crankpin Stop Screw: GT60

    $11.80
    Cylinder & Piston: 25FX

    Cylinder & Piston: 25FX

    $40.73
    Piston: 37SZ-H

    Piston: 37SZ-H

    $32.56
    Cylinder Head: FS-91-P
    5(1)

    Cylinder Head: FS-91-P

    $81.94

    Clearance Sale!

    Cylinder Liner: GT55

    Cylinder Liner: GT55

    $44.33$118.99

    Clearance Sale!

    Collector Ring: FR7 Sirius 7

    Collector Ring: FR7 Sirius 7

    $346.62
    Exhaust Valve Assembly: FS-70 Ultimate

    Exhaust Valve Assembly: FS-70 Ultimate

    $40.12
    Gasket Set: FS-120 II
    5(1)

    Gasket Set: FS-120 II

    $10.94
    Cover Gasket: FS-70 Ultimate

    Cover Gasket: FS-70 Ultimate

    $11.91
    Case Gasket: GT60

    Case Gasket: GT60

    $7.46
    Silencer Body: 200 Surpass

    Silencer Body: 200 Surpass

    $87.21
    Muffler Body F-4050: FS-62V

    Muffler Body F-4050: FS-62V

    $48.43
    Pan Head Screw 3x18mm (10)

    Pan Head Screw 3x18mm (10)

    $11.91
    Exhaust Header Pipe Assembly F5040: FS110A

    Exhaust Header Pipe Assembly F5040: FS110A

    $20.05
    O-Ring IV PRC #6H Rubber

    O-Ring IV PRC #6H Rubber

    $6.49
    Pushrod Cover: FS-26 Surpass

    Pushrod Cover: FS-26 Surpass

    $8.49
    Piston: GT55

    Piston: GT55

    $72.99
    Piston Ring: 55HZ
    4.5(2)

    Piston Ring: 55HZ

    $26.24
    Piston Ring: 140RX

    Piston Ring: 140RX

    $32.56
    Piston Ring: FS-91 FT-160

    Piston Ring: FS-91 FT-160

    $26.24
    Reduction Gear Bearing: FR5

    Reduction Gear Bearing: FR5

    $29.68
    Screw Fixing 4x40mm WLA-2 (1): GT55

    Screw Fixing 4x40mm WLA-2 (1): GT55

    $6.49
    Throttle Link WLA-2: GT55

    Throttle Link WLA-2: GT55

    $10.99
    Throttle Lever Screw #10212A

    Throttle Lever Screw #10212A

    $6.49
    Vavle Exhaust: FS-91 Surpass

    Vavle Exhaust: FS-91 Surpass

    $34.86
    Stator Assembly: 3820-1200 .25

    Stator Assembly: 3820-1200 .25

    $45.99
    Air Funnel: 56FS

    Air Funnel: 56FS

    $17.08
    Carburetor #20M: 37SZ-H

    Carburetor #20M: 37SZ-H

    $87.21
    Carburetor 61D: 65AX
    4.7(3)

    Carburetor 61D: 65AX

    $97.71
    Carburetor: GT15HZ

    Carburetor: GT15HZ

    $190.20
    Muffler Extension: #842
    3(2)

    Muffler Extension: #842

    $11.72
    Motor Mount: 65LA, 61-91FX, 75AX
    5(2)

    Motor Mount: 65LA, 61-91FX, 75AX

    $40.12
    Radial Mount Standoffs: Sirius 7

    Radial Mount Standoffs: Sirius 7

    $9.44
    Piston Ring: 70SZ-H

    Piston Ring: 70SZ-H

    $26.24
    Powerboost Pipe: GT15HZ

    Powerboost Pipe: GT15HZ

    $281.62
    Cam Cover Screws: FS-70 Ultimate (2)
    1(1)

    Cam Cover Screws: FS-70 Ultimate (2)

    $7.46
    Carburetor Body: 70T, GF30

    Carburetor Body: 70T, GF30

    $97.90
    Carburetor Rotor: #60M

    Carburetor Rotor: #60M

    $34.99

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