O.S. Engine

O.S. Engine

Start shopping the wide selection of O.S. Engine parts, accessories, and engines available at A Main Hobbies. We carry an assortment of O.S. Engine products to choose from for airplanes, helicopters, cars and trucks. Our selection include two and four stroke engines, bearings, screws, bolts and more!

Featured O.S. Products
O.S. T-2090SC One Piece Tuned Pipe (No Manifold) (Welded Nipple)
O.S. T-2090SC One Piece Tuned Pipe (No Manifold) (Welded Nipple)
$149.99
O.S. Cylinder & Piston (Speed .21)
O.S. Cylinder & Piston (Speed .21)
$149.99
O.S. .55 HZ-R DRS Ringed Competition Helicopter Engine
O.S. .55 HZ-R DRS Ringed Competition Helicopter Engine
$399.99
O.S. 120AX 1.20 Glow Engine w/Muffler
O.S. 120AX 1.20 Glow Engine w/Muffler
$279.99
O.S. PowerBoost II 50/55 Helicopter Pipe
O.S. PowerBoost II 50/55 Helicopter Pipe
$159.99
O.S. Max .46AXII ABL Airplane Engine w/Muffler
O.S. Max .46AXII ABL Airplane Engine w/Muffler
$149.97
Browse O.S. Products
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RC Airplanes » Electronics » Electric Motors & ESC's » Electric Motors
RC Airplanes » Electronics » Electric Motors & ESC's » Electric Motors
RC Airplanes » Electronics » Electric Motors & ESC's » Electronic Speed Controls
RC Airplanes » Electronics » Electric Motors & ESC's » Electronic Speed Controls
RC Airplanes » Engines » 2-Stroke Glow Engines
RC Airplanes » Engines » 2-Stroke Glow Engines
RC Airplanes » Engines » 4-Stroke Glow Engines
RC Airplanes » Engines » 4-Stroke Glow Engines
RC Airplanes » Engines » Engine Accessories » Glow Plugs
RC Airplanes » Engines » Engine Accessories » Glow Plugs
RC Airplanes » Engines » Engine Accessories » Manifolds
RC Airplanes » Engines » Engine Accessories » Manifolds
RC Airplanes » Engines » Engine Accessories » Tuned Mufflers
RC Airplanes » Engines » Engine Accessories » Tuned Mufflers
RC Airplanes » Engines » Fuel & Accessories » Fuel Filters
RC Airplanes » Engines » Fuel & Accessories » Fuel Filters
RC Airplanes » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Airplanes » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Airplanes » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Airplanes » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Airplanes » Parts » Engine Mounts
RC Airplanes » Parts » Engine Mounts
RC Airplanes » Parts » Engine Parts » Misc Engine Parts
RC Airplanes » Parts » Engine Parts » Misc Engine Parts
RC Airplanes » Parts » Engine Parts » O.S. Engines » 10LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 10LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 120AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 120AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 15LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 15LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 160FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 160FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 25FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 25FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 25LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 25LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 35AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 35AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 46AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 46AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 46LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 46LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 55AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 55AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 61FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 61FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 65LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 65LA
RC Airplanes » Parts » Engine Parts » O.S. Engines » 75AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 75AX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 91FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » 91FX
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-110-A
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-110-A
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-120S-E
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-120S-E
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-120S-III
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-120S-III
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-30S
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-30S
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-56-A
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-56-A
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-81-A
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-81-A
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-91S-II
RC Airplanes » Parts » Engine Parts » O.S. Engines » FS-91S-II
RC Airplanes » Parts » Screws, Bolts & Washers
RC Airplanes » Parts » Screws, Bolts & Washers
RC Boats » Engines » .21 Engines
RC Boats » Engines » .21 Engines
RC Boats » Engines » Fuel & Accessories » Fuel Filters
RC Boats » Engines » Fuel & Accessories » Fuel Filters
RC Boats » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Boats » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Boats » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Boats » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Boats » Parts » Screws, Bolts & Washers
RC Boats » Parts » Screws, Bolts & Washers
RC Cars » Engines » Engine Accessories » Air Filters » Filter Assemblies
RC Cars » Engines » Engine Accessories » Air Filters » Filter Assemblies
RC Cars » Engines » Engine Accessories » Engine Storage
RC Cars » Engines » Engine Accessories » Engine Storage
RC Cars » Engines » Engine Accessories » Glow Plugs » Standard
RC Cars » Engines » Engine Accessories » Glow Plugs » Standard
RC Cars » Engines » Engine Accessories » Glow Plugs » Turbo
RC Cars » Engines » Engine Accessories » Glow Plugs » Turbo
RC Cars » Engines » Engine Accessories » Tuned Pipe Accessories » Gaskets
RC Cars » Engines » Engine Accessories » Tuned Pipe Accessories » Gaskets
RC Cars » Engines » Engine Accessories » Tuned Pipe Manifolds » .12 - .18 » Off Road
RC Cars » Engines » Engine Accessories » Tuned Pipe Manifolds » .12 - .18 » Off Road
RC Cars » Engines » Engine Accessories » Tuned Pipe Manifolds » .21+ » Off Road
RC Cars » Engines » Engine Accessories » Tuned Pipe Manifolds » .21+ » Off Road
RC Cars » Engines » Engine Accessories » Tuned Pipes » .21+ » Off Road
RC Cars » Engines » Engine Accessories » Tuned Pipes » .21+ » Off Road
RC Cars » Engines » Fuel & Accessories » Fuel Filters
RC Cars » Engines » Fuel & Accessories » Fuel Filters
RC Cars » Engines » Nitro Engines » .12 (2.1cc) » On Road
RC Cars » Engines » Nitro Engines » .12 (2.1cc) » On Road
RC Cars » Engines » Nitro Engines » .18 (3.0cc)
RC Cars » Engines » Nitro Engines » .18 (3.0cc)
RC Cars » Engines » Nitro Engines » .21 (3.5cc) » Off Road
RC Cars » Engines » Nitro Engines » .21 (3.5cc) » Off Road
RC Cars » Engines » Nitro Engines » .21 (3.5cc) » On Road
RC Cars » Engines » Nitro Engines » .21 (3.5cc) » On Road
RC Cars » Engines » Nitro Engines » .28 (4.6cc)
RC Cars » Engines » Nitro Engines » .28 (4.6cc)
RC Cars » Engines » Nitro Engines » .30 (4.9cc)
RC Cars » Engines » Nitro Engines » .30 (4.9cc)
RC Cars » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Cars » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Cars » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Cars » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Cars » Parts » Engine Parts » Engine Bearings
RC Cars » Parts » Engine Parts » Engine Bearings
RC Cars » Parts » Engine Parts » JQ Products » THE Engine
RC Cars » Parts » Engine Parts » JQ Products » THE Engine
RC Cars » Parts » Engine Parts » Misc Brands
RC Cars » Parts » Engine Parts » Misc Brands
RC Cars » Parts » Engine Parts » Novarossi » .12 Engines
RC Cars » Parts » Engine Parts » Novarossi » .12 Engines
RC Cars » Parts » Engine Parts » O.S. Engines » .12 TZ
RC Cars » Parts » Engine Parts » O.S. Engines » .12 TZ
RC Cars » Parts » Engine Parts » O.S. Engines » .18 TM
RC Cars » Parts » Engine Parts » O.S. Engines » .18 TM
RC Cars » Parts » Engine Parts » O.S. Engines » .21 Speed V-Spec
RC Cars » Parts » Engine Parts » O.S. Engines » .21 Speed V-Spec
RC Cars » Parts » Engine Parts » O.S. Engines » .21 TM
RC Cars » Parts » Engine Parts » O.S. Engines » .21 TM
RC Cars » Parts » Engine Parts » O.S. Engines » .21 VG
RC Cars » Parts » Engine Parts » O.S. Engines » .21 VG
RC Cars » Parts » Engine Parts » O.S. Engines » .21 VZ-B V-Spec
RC Cars » Parts » Engine Parts » O.S. Engines » .21 VZ-B V-Spec
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B Speed
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B Speed
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B Speed II
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B Speed II
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B V2 ABC VII
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-B V2 ABC VII
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-R
RC Cars » Parts » Engine Parts » O.S. Engines » .21 XZ-R
RC Cars » Parts » Engine Parts » O.S. Engines » .25 XZ
RC Cars » Parts » Engine Parts » O.S. Engines » .25 XZ
RC Cars » Parts » Engine Parts » O.S. Engines » .28 XZ
RC Cars » Parts » Engine Parts » O.S. Engines » .28 XZ
RC Cars » Parts » Engine Parts » O.S. Engines » .30 VG
RC Cars » Parts » Engine Parts » O.S. Engines » .30 VG
RC Cars » Parts » Engine Parts » ProTek R/C » Samurai 321B
RC Cars » Parts » Engine Parts » ProTek R/C » Samurai 321B
RC Cars » Parts » Engine Parts » Traxxas » TRX 2.5
RC Cars » Parts » Engine Parts » Traxxas » TRX 2.5
RC Cars » Parts » Engine Parts » Traxxas » TRX 3.3
RC Cars » Parts » Engine Parts » Traxxas » TRX 3.3
RC Cars » Parts » Factory Parts » Traxxas » Revo
RC Cars » Parts » Factory Parts » Traxxas » Revo
RC Cars » Parts » Factory Parts » Traxxas » Slayer
RC Cars » Parts » Factory Parts » Traxxas » Slayer
RC Cars » Parts » Factory Parts » Traxxas » T-Maxx
RC Cars » Parts » Factory Parts » Traxxas » T-Maxx
RC Cars » Parts » Screws, Bolts & Washers
RC Cars » Parts » Screws, Bolts & Washers
RC Helicopters » Engines » .30 to .60 Engines
RC Helicopters » Engines » .30 to .60 Engines
RC Helicopters » Engines » .90+ Engines
RC Helicopters » Engines » .90+ Engines
RC Helicopters » Engines » Engine Accessories » Exhaust Systems
RC Helicopters » Engines » Engine Accessories » Exhaust Systems
RC Helicopters » Engines » Engine Accessories » Glow Plugs
RC Helicopters » Engines » Engine Accessories » Glow Plugs
RC Helicopters » Engines » Fuel & Accessories » Fuel Filters
RC Helicopters » Engines » Fuel & Accessories » Fuel Filters
RC Helicopters » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Helicopters » Maintenance » Nitro Engine Tools » Piston & Crankshaft Locks
RC Helicopters » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Helicopters » Maintenance » Tools » Wrenches » Glow Plug Wrenches
RC Helicopters » Parts » Engine Parts » Misc Brands
RC Helicopters » Parts » Engine Parts » Misc Brands
RC Helicopters » Parts » Engine Parts » O.S. Engines » 105 HZ
RC Helicopters » Parts » Engine Parts » O.S. Engines » 105 HZ
RC Helicopters » Parts » Engine Parts » O.S. Engines » 105 HZ-R
RC Helicopters » Parts » Engine Parts » O.S. Engines » 105 HZ-R
RC Helicopters » Parts » Engine Parts » O.S. Engines » 50 SX-H Ring Hyper
RC Helicopters » Parts » Engine Parts » O.S. Engines » 50 SX-H Ring Hyper
RC Helicopters » Parts » Engine Parts » O.S. Engines » 55 HZ-H
RC Helicopters » Parts » Engine Parts » O.S. Engines » 55 HZ-H
RC Helicopters » Parts » Engine Parts » O.S. Engines » 91 HZ F3C
RC Helicopters » Parts » Engine Parts » O.S. Engines » 91 HZ F3C
RC Helicopters » Parts » Engine Parts » O.S. Engines » 91 HZ-PS 3D
RC Helicopters » Parts » Engine Parts » O.S. Engines » 91 HZ-PS 3D
RC Helicopters » Parts » Engine Parts » O.S. Engines » 91 SZ-H Ringed
RC Helicopters » Parts » Engine Parts » O.S. Engines » 91 SZ-H Ringed
RC Helicopters » Parts » Option Parts » Screws, Bolts & Washers
RC Helicopters » Parts » Option Parts » Screws, Bolts & Washers
RC Helicopters » Parts » Screws, Bolts & Washers
RC Helicopters » Parts » Screws, Bolts & Washers
RC Multirotor » Parts » Screws, Bolts & Washers
RC Multirotor » Parts » Screws, Bolts & Washers