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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894-941 of 1,758 Results
Carburetor Rotor: 70R, FS155A-P Carburetor Rotor: 70R, FS155A-P
4.1 out of 5 Customer Rating
Carburetor Rotor: 70R, FS155A-P
$13.30 Price reduced from $44.34 to
Clearance Sale! ⓘ
Drive Washer: 91FX Drive Washer: 91FX
5 out of 5 Customer Rating
Drive Washer: 91FX
$16.09
Needle Valve Holder Assembly: 91SZ-H Hyper Needle Valve Holder Assembly: 91SZ-H Hyper
3.7 out of 5 Customer Rating
Needle Valve Holder Assembly: 91SZ-H Hyper
$19.05
Pushrod Cover: FS-91 Surpass Pushrod Cover: FS-91 Surpass
4.5 out of 5 Customer Rating
Pushrod Cover: FS-91 Surpass
$10.90
Pushrod Cover Set: Sirius 7 Pushrod Cover Set: Sirius 7
5 out of 5 Customer Rating
Pushrod Cover Set: Sirius 7
$8.87 Price reduced from $29.55 to
Clearance Sale! ⓘ
Piston: 70SZ-H Piston: 70SZ-H
4.1 out of 5 Customer Rating
Piston: 70SZ-H
$48.51
Piston Pin: FS-90 160 Piston Pin: FS-90 160
4.1 out of 5 Customer Rating
Piston Pin: FS-90 160
$10.86
Piston Ring: FS30S Piston Ring: FS30S
3.9 out of 5 Customer Rating
Piston Ring: FS30S
$7.87 Price reduced from $26.24 to
Clearance Sale! ⓘ
Piston Ring: FS-70 SII Piston Ring: FS-70 SII
4.7 out of 5 Customer Rating
Piston Ring: FS-70 SII
$29.49
Cover Plate Screws (10): 120AX Cover Plate Screws (10): 120AX
3.9 out of 5 Customer Rating
Cover Plate Screws (10): 120AX
$9.85
Valve Assembly Intake: FS-91 Surpass Valve Assembly Intake: FS-91 Surpass
3.3 out of 5 Customer Rating
Valve Assembly Intake: FS-91 Surpass
$38.01
Rocker Arm Support Assembly: FS-20 Rocker Arm Support Assembly: FS-20
5 out of 5 Customer Rating
Rocker Arm Support Assembly: FS-20
$10.90
Main Shaft: 5020-490 .40 Main Shaft: 5020-490 .40
4.1 out of 5 Customer Rating
Main Shaft: 5020-490 .40
$10.99
Crankcase: 46AXII Crankcase: 46AXII
3.7 out of 5 Customer Rating
Crankcase: 46AXII
$52.73
Crankcase: FS-95V Crankcase: FS-95V
3.7 out of 5 Customer Rating
Crankcase: FS-95V
$37.51 Price reduced from $125.03 to
Clearance Sale! ⓘ
Crankshaft: 15CV-A Crankshaft: 15CV-A
4.7 out of 5 Customer Rating
Crankshaft: 15CV-A
$30.89
Cylinder Liner: 200 Surpass Cylinder Liner: 200 Surpass
5 out of 5 Customer Rating
Cylinder Liner: 200 Surpass
$17.70 Price reduced from $59.03 to
Clearance Sale! ⓘ
M11 Header Pipe Nut: FS070S and FS91S II M11 Header Pipe Nut: FS070S and FS91S II
3.7 out of 5 Customer Rating
M11 Header Pipe Nut: FS070S and FS91S II
$6.49
Muffler Mounting Screws #873 (2) Muffler Mounting Screws #873 (2)
3.3 out of 5 Customer Rating
Muffler Mounting Screws #873 (2)
$6.49
Needle Valve Holder Assembly #61B: 91HZ Needle Valve Holder Assembly #61B: 91HZ
5 out of 5 Customer Rating
Needle Valve Holder Assembly #61B: 91HZ
$11.80
Pushrod: FR5 Pushrod: FR5
5 out of 5 Customer Rating
Pushrod: FR5
$3.26 Price reduced from $10.86 to
Clearance Sale! ⓘ
Rocker Support: FS110A Rocker Support: FS110A
4.1 out of 5 Customer Rating
Rocker Support: FS110A
$8.88 Price reduced from $29.60 to
Clearance Sale! ⓘ
Main Shaft: OMA-3820-1200W Main Shaft: OMA-3820-1200W
3.5 out of 5 Customer Rating
Main Shaft: OMA-3820-1200W
$8.99
Carburetor 40L-R: 55HZ-R Carburetor 40L-R: 55HZ-R
5 out of 5 Customer Rating
Carburetor 40L-R: 55HZ-R
$78.13 Price reduced from $260.43 to
Clearance Sale! ⓘ
Carburetor 61H: GT15 Carburetor 61H: GT15
3.7 out of 5 Customer Rating
Carburetor 61H: GT15
$147.01
Carburetor HAD313: GT60 Carburetor HAD313: GT60
5 out of 5 Customer Rating
Carburetor HAD313: GT60
$190.09
Exhaust Header Pipe Assembly: F6020 FS155A-P Exhaust Header Pipe Assembly: F6020 FS155A-P
5 out of 5 Customer Rating
Exhaust Header Pipe Assembly: F6020 FS155A-P
$25.29
Cylinder Head Screws: 56 FS Cylinder Head Screws: 56 FS
3.3 out of 5 Customer Rating
Cylinder Head Screws: 56 FS
$9.85
Motor Mount: FS52S, 56A Motor Mount: FS52S, 56A
4.5 out of 5 Customer Rating
Motor Mount: FS52S, 56A
$36.85
Rear Bearing: FS120 III Rear Bearing: FS120 III
3.7 out of 5 Customer Rating
Rear Bearing: FS120 III
$10.08 Price reduced from $33.61 to
Clearance Sale! ⓘ
Carburetor Body: 61T, FS-62V Carburetor Body: 61T, FS-62V
4.1 out of 5 Customer Rating
Carburetor Body: 61T, FS-62V
$11.68 Price reduced from $38.95 to
Clearance Sale! ⓘ
Speed Hex Wrench Ball Driver 2.0mm Speed Hex Wrench Ball Driver 2.0mm
3.3 out of 5 Customer Rating
Speed Hex Wrench Ball Driver 2.0mm
$36.84
55HZ-H Hyper Ringed .55 Helicopter Engine 55HZ-H Hyper Ringed .55 Helicopter Engine
3.3 out of 5 Customer Rating
55HZ-H Hyper Ringed .55 Helicopter Engine
$418.63
Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4 Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4
4.9 out of 5 Customer Rating
Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4
$111.36
Carburetor Reducer 6.5mm, Red: B2101 Speed Carburetor Reducer 6.5mm, Red: B2101 Speed
3.7 out of 5 Customer Rating
Carburetor Reducer 6.5mm, Red: B2101 Speed
$21.10
T-1070SC L52 Pipe T-1070SC L52 Pipe
5 out of 5 Customer Rating
T-1070SC L52 Pipe
$135.44
TR02 Tuned Silencer Set EFRA2165 TR02 Tuned Silencer Set EFRA2165
4.7 out of 5 Customer Rating
TR02 Tuned Silencer Set EFRA2165
$227.84
Inner Head: O.S.SPEED R21GT2 Inner Head: O.S.SPEED R21GT2
4.9 out of 5 Customer Rating
Inner Head: O.S.SPEED R21GT2
$57.99
Cover Plate: 12TG Cover Plate: 12TG
5 out of 5 Customer Rating
Cover Plate: 12TG
$11.80
Crankcase: 21XZ-R VII Crankcase: 21XZ-R VII
3.1 out of 5 Customer Rating
Crankcase: 21XZ-R VII
$45.70 Price reduced from $152.36 to
Clearance Sale! ⓘ
Cylinder & Piston Assembly: 12XZ Cylinder & Piston Assembly: 12XZ
3.3 out of 5 Customer Rating
Cylinder & Piston Assembly: 12XZ
$99.51
Carburetor Dust Covers: #12FB, 12XZ Speed Carburetor Dust Covers: #12FB, 12XZ Speed
5 out of 5 Customer Rating
Carburetor Dust Covers: #12FB, 12XZ Speed
$7.46
Needle Valve Assembly #12FB: 12XZ Speed Needle Valve Assembly #12FB: 12XZ Speed
3.3 out of 5 Customer Rating
Needle Valve Assembly #12FB: 12XZ Speed
$8.19 Price reduced from $27.29 to
Clearance Sale! ⓘ
Piston Pin Retainer: RX RZ XM Piston Pin Retainer: RX RZ XM
4.7 out of 5 Customer Rating
Piston Pin Retainer: RX RZ XM
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Slide Valve #21JS Slide Valve #21JS
3.9 out of 5 Customer Rating
Slide Valve #21JS
$32.56
Connecting Rod: R2102, Speed 21XZ-GT Connecting Rod: R2102, Speed 21XZ-GT
3.3 out of 5 Customer Rating
Connecting Rod: R2102, Speed 21XZ-GT
$52.58
O.S. Cover Plate Speed: T1203 O.S. Cover Plate Speed: T1203
5 out of 5 Customer Rating
O.S. Cover Plate Speed: T1203
$17.99
O.S. Crankcase Speed: T1203 O.S. Crankcase Speed: T1203
4.1 out of 5 Customer Rating
O.S. Crankcase Speed: T1203
$79.99
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