2025 YEAR IN REVIEW

Our biggest releases of 2025

NEW & IN STOCK

Available now and ready to ship

BEST RC AIRCRAFT OF 2025

Top aircraft from 2025

2025 YEAR IN REVIEW

Our biggest releases of 2025

NEW & IN STOCK

Available now and ready to ship

BEST RC AIRCRAFT OF 2025

Top aircraft from 2025

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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793-816 of 1605 Results

    Regulator Assembly: 91HZR

    $124.95

    Clearance Sale!

    Needle Holder FT-120-300

    $3.54$11.80

    Clearance Sale!

    Self-Tapping Screw, 2X12 (10)

    $8.58

    Rear Bearing: 50SX-H, 55HZ, 55AX

    $34.76

    Crankshaft: 46AX

    $50.72

    M11 Header Pipe Nut: FS070S and FS91S II

    $6.49

    Clearance Sale!

    Front Housing: Sirius 7

    $210.06$519.74

    Clearance Sale!

    Carburetor Body: 18TM

    $46.31

    Crankcase: O.S. Max .12 TG Version 4

    $54.76

    Cylinder Head Gasket: 35AX

    $6.49

    Needle Assembly: FT-120-300

    $19.05

    O-Ring Metal Valve: 120Surpass

    $6.49

    Pushrod Cover Assembly: 120Surpass

    $22.04

    Clearance Sale!

    Drive Shaft Bearing: Sirius 7

    $7.30$24.36

    Clearance Sale!

    Woodruff Key: 30Wankel

    $6.49

    Speed Exhaust Seal Ring (10): B21

    $38.86

    Gasket Set: 25XZ

    $7.99

    Cam Follower: 200 Surpass

    $22.26

    Connecting Rod: FS-120 SP

    $40.12

    Rear Bearing: 19XZ-B Speed

    $109.38

    Cover Plate: FL-70

    $9.99

    Crankshaft Bearing, Front: FS-91

    $26.34

    Valve Spring: 20-300

    $6.49

    Inner Head: 19XZ-B Speed

    $57.73

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