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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366-413 of 1,758 Results
Cylinder Head Assembly: FS-120 III Cylinder Head Assembly: FS-120 III
4 out of 5 Customer Rating
Cylinder Head Assembly: FS-120 III
$162.95
Cylinder Liner: 105HZ Cylinder Liner: 105HZ
5 out of 5 Customer Rating
Cylinder Liner: 105HZ
$105.05
Head Gasket FS155A-P Head Gasket FS155A-P
4.4 out of 5 Customer Rating
Head Gasket FS155A-P
$6.49
Carburetor Gasket: GT15HZ Carburetor Gasket: GT15HZ
3.4 out of 5 Customer Rating
Carburetor Gasket: GT15HZ
$10.94
Intake Manifold Assembly: FS-120III Intake Manifold Assembly: FS-120III
5 out of 5 Customer Rating
Intake Manifold Assembly: FS-120III
$34.86
Mixture Control Valve: #60K Mixture Control Valve: #60K
5 out of 5 Customer Rating
Mixture Control Valve: #60K
$7.79 Price reduced from $25.99 to
Clearance Sale! ⓘ
Muffler Assembly F-5050: FS-95V Muffler Assembly F-5050: FS-95V
4.4 out of 5 Customer Rating
Muffler Assembly F-5050: FS-95V
$63.04
Reed Valve Assembly: GT60 Reed Valve Assembly: GT60
5 out of 5 Customer Rating
Reed Valve Assembly: GT60
$25.19
Head Gasket: 15CV Head Gasket: 15CV
4.8 out of 5 Customer Rating
Head Gasket: 15CV
$6.49
Speed Ball Driver Replacement Tip 2.5 Speed Ball Driver Replacement Tip 2.5
3.6 out of 5 Customer Rating
Speed Ball Driver Replacement Tip 2.5
$18.53
M2002SC 80mm Manifold: 21XZ-B, 21VZ-B, 25XZ, 30VG M2002SC 80mm Manifold: 21XZ-B, 21VZ-B, 25XZ, 30VG
4 out of 5 Customer Rating
M2002SC 80mm Manifold: 21XZ-B, 21VZ-B, 25XZ, 30VG
$67.39
Cover Plate: R21 Cover Plate: R21
4 out of 5 Customer Rating
Cover Plate: R21
$6.61 Price reduced from $22.04 to
Clearance Sale! ⓘ
Crankshaft: Speed B2102 Crankshaft: Speed B2102
5 out of 5 Customer Rating
Crankshaft: Speed B2102
$193.70
Universal Nipple #12 Universal Nipple #12
5 out of 5 Customer Rating
Universal Nipple #12
$6.49
Needle Holder 12F-B: 12XZ Speed Spec 3 Needle Holder 12F-B: 12XZ Speed Spec 3
5 out of 5 Customer Rating
Needle Holder 12F-B: 12XZ Speed Spec 3
$19.14
Camshaft: FS-40, 48 Surpass Camshaft: FS-40, 48 Surpass
3.7 out of 5 Customer Rating
Camshaft: FS-40, 48 Surpass
$41.94
Connecting Rod: 95AX Connecting Rod: 95AX
3.7 out of 5 Customer Rating
Connecting Rod: 95AX
$29.60
Crankcase: 120 Surpass Crankcase: 120 Surpass
3.7 out of 5 Customer Rating
Crankcase: 120 Surpass
$162.87
Drive Washer: FS-48 Surpass Drive Washer: FS-48 Surpass
5 out of 5 Customer Rating
Drive Washer: FS-48 Surpass
$13.75
Exhaust Pipe Assembly: FS81 Alpha Exhaust Pipe Assembly: FS81 Alpha
4.7 out of 5 Customer Rating
Exhaust Pipe Assembly: FS81 Alpha
$19.14
Intake Pipe Assembly: FS-120 SP Intake Pipe Assembly: FS-120 SP
3.3 out of 5 Customer Rating
Intake Pipe Assembly: FS-120 SP
$36.99
Silencer Assembly Screw: 56 FS Silencer Assembly Screw: 56 FS
4.7 out of 5 Customer Rating
Silencer Assembly Screw: 56 FS
$8.43
Mufler Body F6020: FS155A-P Mufler Body F6020: FS155A-P
3.9 out of 5 Customer Rating
Mufler Body F6020: FS155A-P
$70.40
Muffler Assembly Screw #843 #892 Muffler Assembly Screw #843 #892
3.3 out of 5 Customer Rating
Muffler Assembly Screw #843 #892
$8.43
O-Ring Muffler Gasket F6020: FS155A-P O-Ring Muffler Gasket F6020: FS155A-P
5 out of 5 Customer Rating
O-Ring Muffler Gasket F6020: FS155A-P
$8.49
Pushrod: GF30 Pushrod: GF30
4.1 out of 5 Customer Rating
Pushrod: GF30
$7.87 Price reduced from $26.24 to
Clearance Sale! ⓘ
Rocker Cover Gasket: 200 Surpass Rocker Cover Gasket: 200 Surpass
5 out of 5 Customer Rating
Rocker Cover Gasket: 200 Surpass
$6.49
Main Shaft: 3820-960 Main Shaft: 3820-960
3.5 out of 5 Customer Rating
Main Shaft: 3820-960
$8.99
Carburetor Body: #10G Carburetor Body: #10G
5 out of 5 Customer Rating
Carburetor Body: #10G
$17.16
Cover Plate: 46AXII Cover Plate: 46AXII
5 out of 5 Customer Rating
Cover Plate: 46AXII
$11.80
Cover Plate: 35AX Cover Plate: 35AX
4.4 out of 5 Customer Rating
Cover Plate: 35AX
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
Crankshaft: FS-52 Crankshaft: FS-52
5 out of 5 Customer Rating
Crankshaft: FS-52
$47.99
Cylinder Head: .35AX Cylinder Head: .35AX
5 out of 5 Customer Rating
Cylinder Head: .35AX
$22.04
Cylinder Head: 120AX Cylinder Head: 120AX
5 out of 5 Customer Rating
Cylinder Head: 120AX
$57.78
Cylinder Liner: GT22 Cylinder Liner: GT22
4.4 out of 5 Customer Rating
Cylinder Liner: GT22
$69.76
Head Gasket: 25LA Head Gasket: 25LA
5 out of 5 Customer Rating
Head Gasket: 25LA
$6.49
Silencer Assembly Screws: #F-6010 FS-200S Silencer Assembly Screws: #F-6010 FS-200S
4.8 out of 5 Customer Rating
Silencer Assembly Screws: #F-6010 FS-200S
$9.85
Piston: FS110A Piston: FS110A
4.4 out of 5 Customer Rating
Piston: FS110A
$48.51
Piston: GT15 Piston: GT15
4 out of 5 Customer Rating
Piston: GT15
$17.33 Price reduced from $57.78 to
Clearance Sale! ⓘ
Rocker Arm Support Assembly: 120 Surpass Rocker Arm Support Assembly: 120 Surpass
4.8 out of 5 Customer Rating
Rocker Arm Support Assembly: 120 Surpass
$10.46 Price reduced from $34.86 to
Clearance Sale! ⓘ
Thrust Washer: BGX-3500 Thrust Washer: BGX-3500
4.8 out of 5 Customer Rating
Thrust Washer: BGX-3500
$6.49
Valve In Ex: 90-320 Valve In Ex: 90-320
3.6 out of 5 Customer Rating
Valve In Ex: 90-320
$36.85
Pump Fixing Screw Assembly: 91SZ-H Hyper Pump Fixing Screw Assembly: 91SZ-H Hyper
4.2 out of 5 Customer Rating
Pump Fixing Screw Assembly: 91SZ-H Hyper
$5.70
Cam Gear: Sirius 7 Cam Gear: Sirius 7
4 out of 5 Customer Rating
Cam Gear: Sirius 7
$19.29 Price reduced from $52.66 to
Clearance Sale! ⓘ
Connecting Rod: 37SZ-H Connecting Rod: 37SZ-H
3.6 out of 5 Customer Rating
Connecting Rod: 37SZ-H
$22.04
Crankshaft: 55AX Crankshaft: 55AX
4.4 out of 5 Customer Rating
Crankshaft: 55AX
$55.12
Mixture Control Screw: #2F and #2FB Mixture Control Screw: #2F and #2FB
5 out of 5 Customer Rating
Mixture Control Screw: #2F and #2FB
$9.44
Needle Holder FT-120-300 Needle Holder FT-120-300
4 out of 5 Customer Rating
Needle Holder FT-120-300
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
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