O.S. Engines

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

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Dust Cap Set: 12-30 Class

$9.85

Screw Set (8): 12CV-X

$7.46

Slide Valve 12F2: 12XZ Speed Spec 3

$10.08 ~~Price reduced from $33.61 to~~

Clearance Sale! ⓘ

Starting Shaft: 30VG ES

$22.30

Cylinder Head: 25LA Natural

$17.08

OCA-240 40-Amp 25V ESC with OCP-2 Programming Card

$109.99

Rear Bearing: 25FX, 32F

$21.17

Cam Cover: FS-120 Surpass

$10.86

Carburetor Body: 61ER

$29.36 ~~Price reduced from $97.88 to~~

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Cover Plate: FSa-72II

$5.78 ~~Price reduced from $19.25 to~~

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Crankcase: 105HZ

$179.68

Crankshaft: 35-40FP

$28.68

Crankshaft: GT15

$22.49 ~~Price reduced from $74.96 to~~

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Cylinder Liner: GF30

$17.71 ~~Price reduced from $59.03 to~~

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Cylinder Liner: GGT10

$64.22

Drive Washer: FS-120 II

$24.23

Gasket Set: 70SZ-H

$7.46

Lock Cone: 40P/60GP

$26.24

Silencer E-4040: GT15 75AX 95AX

$51.64

Screw Assembly: F-5030 FS81 Alpha

$9.85

Pushrod Cover: 56FS-a

$2.53 ~~Price reduced from $8.43 to~~

Clearance Sale! ⓘ

Piston Ring: FS-120 III

$32.56

Spark Plug CM6: GT-55

$26.99

Prop Locknut FF-240 320

$41.12