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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549-572 of 1,605 Results
Thermo Insulator 21J3 Thermo Insulator 21J3
4.6 out of 5 Customer Rating
Thermo Insulator 21J3
$19.14
Inner Head O-Ring O.S. T1204 (S30-FKM) Inner Head O-Ring O.S. T1204 (S30-FKM)
5 out of 5 Customer Rating
Inner Head O-Ring O.S. T1204 (S30-FKM)
$9.89
Carburetor Reducer, 6.5mm: OS Speed B21 Pink Rhonda Drake Edition Carburetor Reducer, 6.5mm: OS Speed B21 Pink Rhonda Drake Edition
5 out of 5 Customer Rating
Carburetor Reducer, 6.5mm: OS Speed B21 Pink Rhonda Drake Edition
$22.11
Carburetor 21M2-B: Speed R2101 Carburetor 21M2-B: Speed R2101
3.4 out of 5 Customer Rating
Carburetor 21M2-B: Speed R2101
$152.36
Carburetor Body: #21C Carburetor Body: #21C
5 out of 5 Customer Rating
Carburetor Body: #21C
$24.00 Price reduced from $79.99 to
Clearance Sale! ⓘ
Crankcase: R21 Crankcase: R21
4 out of 5 Customer Rating
Crankcase: R21
$136.57
Crankshaft: 12XZ Speed Spec II Crankshaft: 12XZ Speed Spec II
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed Spec II
$35.99 Price reduced from $119.97 to
Clearance Sale! ⓘ
Crankshaft: 28XZ Crankshaft: 28XZ
4 out of 5 Customer Rating
Crankshaft: 28XZ
$131.09
Inner Head: 21XZ-R Speed Inner Head: 21XZ-R Speed
3.6 out of 5 Customer Rating
Inner Head: 21XZ-R Speed
$57.96
Carburetor Reducer 8mm, Red: Speed 21 V-Spec Carburetor Reducer 8mm, Red: Speed 21 V-Spec
4 out of 5 Customer Rating
Carburetor Reducer 8mm, Red: Speed 21 V-Spec
$21.10
M1006SC Manifold M1006SC Manifold
3.6 out of 5 Customer Rating
M1006SC Manifold
$21.48 Price reduced from $71.60 to
Clearance Sale! ⓘ
Rear Bearing: 12TR Rear Bearing: 12TR
5 out of 5 Customer Rating
Rear Bearing: 12TR
$61.99
O.S. Pistion Pin: .12XZ O.S. Pistion Pin: .12XZ
4.8 out of 5 Customer Rating
O.S. Pistion Pin: .12XZ
$8.99
Crankshaft: 21XZ-R Crankshaft: 21XZ-R
4.2 out of 5 Customer Rating
Crankshaft: 21XZ-R
$144.99
Cylinder & Piston Assembly: 21TM Cylinder & Piston Assembly: 21TM
5 out of 5 Customer Rating
Cylinder & Piston Assembly: 21TM
$122.17
Outer Head: Speed 21 V-Spec Outer Head: Speed 21 V-Spec
3.4 out of 5 Customer Rating
Outer Head: Speed 21 V-Spec
$42.00 Price reduced from $139.99 to
Clearance Sale! ⓘ
Exhaust Gasket: 21RZ Exhaust Gasket: 21RZ
4.4 out of 5 Customer Rating
Exhaust Gasket: 21RZ
$13.78
Mixture Control Valve 18TM Mixture Control Valve 18TM
4.4 out of 5 Customer Rating
Mixture Control Valve 18TM
$14.73
Metering Needle Assembly: 30VG Metering Needle Assembly: 30VG
5 out of 5 Customer Rating
Metering Needle Assembly: 30VG
$19.14
O.S. Metering Needle Assembly 22D Speed B2103 O.S. Metering Needle Assembly 22D Speed B2103
3.4 out of 5 Customer Rating
O.S. Metering Needle Assembly 22D Speed B2103
$19.14
Carburetor 80T: Sirius 7 Carburetor 80T: Sirius 7
4.1 out of 5 Customer Rating
Carburetor 80T: Sirius 7
$52.52 Price reduced from $125.08 to
Clearance Sale! ⓘ
E4050 In-Cowl Muffler: 65AX E4050 In-Cowl Muffler: 65AX
5 out of 5 Customer Rating
E4050 In-Cowl Muffler: 65AX
$67.33
Locknut Set: FT, FR5 Locknut Set: FT, FR5
4.1 out of 5 Customer Rating
Locknut Set: FT, FR5
$41.12
Cam Cover: 56 FS Cam Cover: 56 FS
4.5 out of 5 Customer Rating
Cam Cover: 56 FS
$3.57 Price reduced from $11.91 to
Clearance Sale! ⓘ
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