O.S. Engines

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

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Motor Mount: FS91SII, FS110 Pump

$44.22

Rear Bearing: 61-300

$22.16

Carburetor Screw: FS61-FT300

$6.49

Crankshaft: 91HZ-R Speed 3D 3C

$102.54

Cylinder & Piston: B21 Speed Adam Drake

$188.33

Outer Head: Speed 21XZ-GT

$30.76 ~~Price reduced from $102.52 to~~

Clearance Sale! ⓘ

Heat Sink Head: 21TM

$80.41

Gasket Set: 25XZ

$7.99

Rotor Stop Screw #2FB #2F

$6.45

Slide Valve 22C(B): Speed B2102

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

Clearance Sale! ⓘ

Outer Head O.S. Speed B21 Adam Drake Edition 3

$97.99

M2001SC Manifold: 21XZ-R, 21VG

$67.39

Crankshaft: B2101 Speed

$205.99

O.S. Cylinder Piston Rod Set Speed: T1203

$176.79

Piston Pin: 30VG

$11.91

#7 Glow Plug, Medium Hot Air

$11.99

Breather Nipple: FS-20, 40

$6.49

Cam Follower: FS-61, 48 Surpass

$17.08

Carburetor Body: #60M

$21.43 ~~Price reduced from $71.43 to~~

Clearance Sale! ⓘ

Cover Plate: GGT10

$6.68 ~~Price reduced from $22.26 to~~

Clearance Sale! ⓘ

Cylinder Head: 56 FS

$63.20

Cylinder Jacket: FT-160

$70.37

Exhaust Pipe Assembly: T-120 160

$22.04

Water Nipple: #2

$6.49