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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193-240 of 1,758 Results
Reed Valve Assembly: GT60 Reed Valve Assembly: GT60
5 out of 5 Customer Rating
Reed Valve Assembly: GT60
$25.19
Rocker Arm Assembly FS-20 Rocker Arm Assembly FS-20
5 out of 5 Customer Rating
Rocker Arm Assembly FS-20
$22.04
Rocker Arm Shaft: FS-95V Rocker Arm Shaft: FS-95V
4.8 out of 5 Customer Rating
Rocker Arm Shaft: FS-95V
$6.49
Rocker Cover: 120 Surpass Rocker Cover: 120 Surpass
4.4 out of 5 Customer Rating
Rocker Cover: 120 Surpass
$14.73
Rocker Cover: GF30 Rocker Cover: GF30
3.6 out of 5 Customer Rating
Rocker Cover: GF30
$5.72 Price reduced from $19.05 to
Clearance Sale! ⓘ
Rotor Guide Screw: F90-300 Rotor Guide Screw: F90-300
3.6 out of 5 Customer Rating
Rotor Guide Screw: F90-300
$6.49
Rotor Gear Screw: 30Wankel Rotor Gear Screw: 30Wankel
5 out of 5 Customer Rating
Rotor Gear Screw: 30Wankel
$4.15 Price reduced from $13.83 to
Clearance Sale! ⓘ
Rotor Stop #4B #4D #4C Rotor Stop #4B #4D #4C
4.4 out of 5 Customer Rating
Rotor Stop #4B #4D #4C
$9.85
Screw Set (8): 12CV-X Screw Set (8): 12CV-X
5 out of 5 Customer Rating
Screw Set (8): 12CV-X
$7.46
Slide Valve 21M Slide Valve 21M
5 out of 5 Customer Rating
Slide Valve 21M
$9.77 Price reduced from $32.56 to
Clearance Sale! ⓘ
Tappet Screw: F40-300 Tappet Screw: F40-300
4.6 out of 5 Customer Rating
Tappet Screw: F40-300
$9.99
Throttle Lever #2F #2FB Throttle Lever #2F #2FB
4.8 out of 5 Customer Rating
Throttle Lever #2F #2FB
$7.49
Throttle Arm Assembly WLA-2: GT55 Throttle Arm Assembly WLA-2: GT55
4 out of 5 Customer Rating
Throttle Arm Assembly WLA-2: GT55
$7.46
Ball WLA-2: GT55 Ball WLA-2: GT55
5 out of 5 Customer Rating
Ball WLA-2: GT55
$6.99
Throttle Lever #11K Throttle Lever #11K
4 out of 5 Customer Rating
Throttle Lever #11K
$16.09
Throttle Stop Screw 22C(B): Speed B2102 Throttle Stop Screw 22C(B): Speed B2102
3.6 out of 5 Customer Rating
Throttle Stop Screw 22C(B): Speed B2102
$11.87
Thrust Washer: 120Surpass Thrust Washer: 120Surpass
4 out of 5 Customer Rating
Thrust Washer: 120Surpass
$6.49
Valve: FS-40 48Surpass Valve: FS-40 48Surpass
3.6 out of 5 Customer Rating
Valve: FS-40 48Surpass
$21.10
Valve Assembly Exhaust: FS-52 Surpass Valve Assembly Exhaust: FS-52 Surpass
5 out of 5 Customer Rating
Valve Assembly Exhaust: FS-52 Surpass
$22.26
Valve Spring: FS155A-P Valve Spring: FS155A-P
4.4 out of 5 Customer Rating
Valve Spring: FS155A-P
$6.49
Valve Spring: F90 160 Valve Spring: F90 160
4.8 out of 5 Customer Rating
Valve Spring: F90 160
$6.49
Main Shaft: OMA3825-750W Main Shaft: OMA3825-750W
4.6 out of 5 Customer Rating
Main Shaft: OMA3825-750W
$8.49
Motor Mount: OMA-50 Series Motor Mount: OMA-50 Series
5 out of 5 Customer Rating
Motor Mount: OMA-50 Series
$19.99
Prop Shaft Set: OMA-28 Series Prop Shaft Set: OMA-28 Series
3.6 out of 5 Customer Rating
Prop Shaft Set: OMA-28 Series
$6.29 Price reduced from $20.99 to
Clearance Sale! ⓘ
Cylinder Head with Valves: FS120SE Cylinder Head with Valves: FS120SE
4.2 out of 5 Customer Rating
Cylinder Head with Valves: FS120SE
$185.03
Silencer Assembly Screws: #F-6010 FS-200S Silencer Assembly Screws: #F-6010 FS-200S
4.8 out of 5 Customer Rating
Silencer Assembly Screws: #F-6010 FS-200S
$9.85
Cylinder Head: Sirius 7 Cylinder Head: Sirius 7
4.8 out of 5 Customer Rating
Cylinder Head: Sirius 7
$97.71
O-Ring Large: 120-300 O-Ring Large: 120-300
3.6 out of 5 Customer Rating
O-Ring Large: 120-300
$6.49
O-Ring Large: 120Surpass O-Ring Large: 120Surpass
5 out of 5 Customer Rating
O-Ring Large: 120Surpass
$6.49
Pushrod Cover: FS-26 Surpass Pushrod Cover: FS-26 Surpass
5 out of 5 Customer Rating
Pushrod Cover: FS-26 Surpass
$8.49
Pushrod Cover: 120 Surpass Pushrod Cover: 120 Surpass
5 out of 5 Customer Rating
Pushrod Cover: 120 Surpass
$10.90
Muffler Screws #843 (2) Muffler Screws #843 (2)
5 out of 5 Customer Rating
Muffler Screws #843 (2)
$6.49
Assembly Screw E3080: 35AX Assembly Screw E3080: 35AX
5 out of 5 Customer Rating
Assembly Screw E3080: 35AX
$8.43
Muffler Screw: 120AX Muffler Screw: 120AX
4.4 out of 5 Customer Rating
Muffler Screw: 120AX
$8.43
Muffler Assembly Screw #E-2030 Muffler Assembly Screw #E-2030
5 out of 5 Customer Rating
Muffler Assembly Screw #E-2030
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Mix Control Valve Assembly: #60 Mix Control Valve Assembly: #60
4.6 out of 5 Customer Rating
Mix Control Valve Assembly: #60
$25.29
Pushrod Cover Assembly: FS-70 Ultimate Pushrod Cover Assembly: FS-70 Ultimate
5 out of 5 Customer Rating
Pushrod Cover Assembly: FS-70 Ultimate
$17.99
Head Gasket: 30VG Head Gasket: 30VG
4.4 out of 5 Customer Rating
Head Gasket: 30VG
$7.46
Needle 61H: GT15 Needle 61H: GT15
5 out of 5 Customer Rating
Needle 61H: GT15
$13.78
Head Gasket: FF-320 Head Gasket: FF-320
4.4 out of 5 Customer Rating
Head Gasket: FF-320
$4.20 Price reduced from $6.49 to
Clearance Sale! ⓘ
Head Gasket .4 Aluminum: Sirius 7 Head Gasket .4 Aluminum: Sirius 7
5 out of 5 Customer Rating
Head Gasket .4 Aluminum: Sirius 7
$6.49
Cylinder Gasket: GT60 Cylinder Gasket: GT60
4.2 out of 5 Customer Rating
Cylinder Gasket: GT60
$7.46
Front Housing: GT60 Front Housing: GT60
5 out of 5 Customer Rating
Front Housing: GT60
$87.18
Piston Pin Retainer: 50SX-H Piston Pin Retainer: 50SX-H
4.4 out of 5 Customer Rating
Piston Pin Retainer: 50SX-H
$7.46
Cover Gasket: S42, GT22 Cover Gasket: S42, GT22
3.4 out of 5 Customer Rating
Cover Gasket: S42, GT22
$7.46
Cover Gasket: FS-70 Ultimate Cover Gasket: FS-70 Ultimate
3.4 out of 5 Customer Rating
Cover Gasket: FS-70 Ultimate
$11.91
Gasket Head: 65AX Gasket Head: 65AX
4.4 out of 5 Customer Rating
Gasket Head: 65AX
$6.49
Cylinder Head Assembly: FS-120 III Cylinder Head Assembly: FS-120 III
4 out of 5 Customer Rating
Cylinder Head Assembly: FS-120 III
$162.95
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