Hobby RC Motor & Engine Parts & Accessories for OS 1:10 Helicopters

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Engine, Exhaust & Fuel Systems
- Motor & Engine Parts & Accs
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- Fuel Delivery & Accessories
- Gas/Nitro Engines
- Ignition, Glow & Spark Plugs
- Oils, Lubricants & Maintenance
- Other Engine/Exhaust/Fuel Sys.

188 results

O.S. Engine 21921020 21TM Crankcase Genuine Replacement Part New
$60.00
or Best Offer
$7.10 shipping
O.S. OS 10G Carb Carburetor #10G : .15 15 LA 15LA RC Engine Part 21783000
(4)
$29.95
Free shipping
47 watching
O.S.OS Engine RC 21931000 Crankshaft Bearing (R) for 18TM
$29.95
Free shipping
Ogawa Seiki 25303400 Piston Ring for .50SX-H 46FX-H 46SF OSMG7790 Black NEW
(7)
$25.38
$50.00 shipping
OS 22681980 Replacement Remote Control Engine Needle OS 25 32 46 61FX Engines
(5)
$12.99
$4.99 shipping
7 watching
O.S. Engines: Cylinder Liner: 55HZ Hyper
$39.99
$4.69 shipping
0 bids
6d 5h
OS Engines 91HZ Piston 29073200 NEW OEM Replacement
(3)
$68.00
or Best Offer
$4.00 shipping
10 watching
OS Engines Crankshaft Clamp 32/50/55 71530400 NEW OEM Replacement
(3)
$18.00
or Best Offer
$4.00 shipping
OS Engines Piston Pin Retainer 50SX-H 55HZ/HZ-R 25217000 NEW OEM Replacement
$6.00
or Best Offer
$1.00 shipping
OS Engines Front Bearing 37SZ-H 22831000 NEW OEM Replacement
$12.00
or Best Offer
$2.00 shipping
Only 1 left!
OS Engines Piston Ring 70SZ-H 27003400 NEW OEM Replacement
$21.00
or Best Offer
$4.00 shipping
OS Engines Piston 50SX-H 25203200 NEW OEM Replacement
$27.00
or Best Offer
$4.00 shipping
7 watching
OS Engines Gasket Set 37SZ-H 23424000 NEW OEM Replacement
$9.00
or Best Offer
$4.00 shipping
O.S. OS Engine RC 25425400 Silencer Screw Set
(3)
$11.94
Free shipping
OS Engines Exhaust Gasket 50SX 55HZ/HZ-R 72144040 *qty-1 ONLY* NEW
(2)
$6.00
or Best Offer
$1.00 shipping
4 watching
OS Engines Pressure Nipple M4 72145030 NEW OEM Replacement
$5.00
or Best Offer
$2.00 shipping
OS Engines 24803412 Piston Ring 40F
(4)
$24.00
$4.41 shipping
OS Engines Rear Bearing 50SX 55HZ 55AX 25830010 NEW OEM Replacement
$27.00
or Best Offer
$4.00 shipping
Copper Exhaust Gasket for YS Engines 91/96SRX 120SRX *Made in USA*
$4.00
or Best Offer
$1.00 shipping
OS Engine 21SE, 21RF, 25FX, 32SX Crankshaft Ball Bearing F 22831000 New RC Nitro
$9.99
or Best Offer
$4.69 shipping
OS Engines 72403070 High Pressure Check Valve 91HZ-R OSMG6007
$21.10
Free shipping
OS Engines Front Bearing 50SX 55HZ 91HZ 105HZ 26731002 NEW OEM Replacement
$18.00
or Best Offer
$4.00 shipping
6 watching
OS Engines Piston 105HZ 105HZ-R 28703200 NEW OEM Replacement
$72.00
or Best Offer
$4.00 shipping
OS Engines 91HZ Piston Ring 29503400 OEM Replacement
(10)
$19.00
or Best Offer
$4.00 shipping
OS Engines 24881824 O-Ring IV/PRC #6H Rubber OSMG7372
(4)
$6.49
$4.99 shipping
OS Engines Piston Ring 105HZ 105HZ-R 29203400 NEW OEM Replacement
(1)
$24.00
or Best Offer
$2.00 shipping
O.S. Engines: Gasket Head, .1mm: 105HZ
$4.99
$4.69 shipping
0 bids
6d 5h
OS Engines 91HZ 105HZ Bearing Set Front & Rear OEM Replacement
$25.00
or Best Offer
$4.00 shipping
2 watching
OS Engines Piston Pin Retainer 37SZ-H 24517000 NEW OEM Replacement
(1)
$5.00
or Best Offer
$1.00 shipping
3 watching
Copper Exhaust Gasket for YS Engines 91ST 91SR 91SR-S *Made in USA*
$4.00
or Best Offer
$1.00 shipping
OS Engines Carb Retainer 50SX-H 23981700 NEW OEM Replacement
$8.00
or Best Offer
$4.00 shipping
O.S. Engines: Cylinder Liner: 105HZ
$45.99
$4.69 shipping
0 bids
6d 5h
OS A3 (#6) Hot Glow Plug for .12-.18 Nitro Engines OSMG2690 OSM71605300
(23)
$5.90
$5.40 shipping
OS Engines Heatsink Head (Blue) 50SX-H 25204200 NEW OEM Replacement
$78.00
or Best Offer
$4.00 shipping
O.S. Engines: Gasket Head, .2mm: 105HZ
$4.99
$4.69 shipping
0 bids
6d 5h
OS Engines Carburetor Complete 60M-C 29183000 OEM Replacement
$75.00
or Best Offer
$4.00 shipping
3 watching
OS Engines Throttle Lever Assembly 29085140 NEW OEM Replacement
(1)
$6.00
or Best Offer
$2.00 shipping
O.S. OS Engine RC 24007020 Cover Plate Unit for 40 46 LA
(2)
$11.75
Free shipping
OS Engines Head Gasket 105HZ 0.2T 28704160 NEW OEM Replacement
$5.00
or Best Offer
$1.00 shipping
Only 1 left!
OS Engines Non-Bubble Weight S 71531010 NEW OEM Replacement
$13.00
or Best Offer
$4.00 shipping
OS Engines 91SZ 91HZ 105HZ Hardware Set OEM Replacement
$6.00
or Best Offer
$2.00 shipping
OS Engines 105HZ 91HZ Connecting Rod 29505010 NEW OEM Replacement
$24.00
or Best Offer
$4.00 shipping
O.S. Engines: Piston Ring: 108FSR (105HZ & 105HZ-R)
(1)
$19.99
$4.69 shipping
0 bids
6d 5h
OS Engines Piston Ring 91HZ Speed 91HZ-R 29503400 NEW OEM Replacement
(10)
$23.00
or Best Offer
$4.00 shipping
6 watching
OS Engines Spinner Nut 23024008 For 20,25,RE
(4)
$5.99
$4.60 shipping
OS Engines Cylinder Liner 50SX-H Hyper 25203100 NEW OEM Replacement
$54.00
or Best Offer
$4.00 shipping
3 watching
OS Engines 91HZ 105HZ Connecting Rod 29505010 OEM Replacement
$24.00
or Best Offer
$4.00 shipping
OS Engines 91HZ 105HZ Piston Pin Retainers 27917000 NEW OEM Replacement
(1)
$6.00
or Best Offer
$1.00 shipping
OS Engines 91RZ-H Heatsink Head (cylinder head) 29064010 OEM Replacement
$34.00
or Best Offer
$4.00 shipping
O.S. Crankcase For 21TM-T .21 Engine
$79.95
Free shipping
OS Engines Helicopter Engine Replacement Piston Ring .55HZ .55 55 HZ 27703400
(2)
$32.95
Free shipping
OS Engines Exhaust Gasket Set 50SX/55HZ/HZ-R 72144040 NEW OEM Replacement
(2)
$16.00
or Best Offer
$1.00 shipping
OS Engines Cover Plate 50SX-H 25207001 NEW OEM Replacement Backplate
$9.00
or Best Offer
$4.00 shipping
OS O.S. RC Engine Piston Ring GGT10 61SX RX SFN RFN FSR LX VF-H 26703404
(4)
$26.50
Free shipping
Only 3 left
O.S. FS-70S, FS-91 S SII, S II (P) Surpass Engine Valve Spring Retainer
$8.95
$6.95 shipping
OS Engines Rear Bearing 37SZ-H 21RZ 23730000 NEW OEM Replacement
$27.00
or Best Offer
$2.00 shipping
OS Engines Cylinder Liner 37SZ-H 23413100 NEW OEM Replacement
$36.00
or Best Offer
$4.00 shipping
OS Engines 91SZ-H Piston Pin 27006000 OEM Replacement
$6.00
or Best Offer
$2.00 shipping
OS Engines Cylinder Liner 91SZ-H 29063100 NEW OEM Replacement
$69.00
or Best Offer
$4.00 shipping
OS Engines Thrust Washer 50/55/61/70/91/105 46120000 NEW OEM Replacement
(2)
$5.50
or Best Offer
$1.00 shipping

Best selling

See All

Review highlights

Recommended by our customers

very good Piston Ring
By phatvu11
It is a good Piston Ring, it is fit exactly into the piston see all reviews
Verified Purchase
29503400 OS Piston Ring 91FX
Solid little plug
By bes-etha
As has been the case with every other OS plug I own these continue to be my go-to for consistent tuning, excellent perfo... see all reviews
Verified Purchase
4PCS OS GLOW PLUG No #6 (Former A3) # OS71605300 **O.S. Engines Genuine Parts**

Hobby RC Motor & Engine Parts & Accessories for OS 1:10 Helicopters

Shop by category

188 results

O.S. Engine 21921020 21TM Crankcase Genuine Replacement Part New

O.S. OS 10G Carb Carburetor #10G : .15 15 LA 15LA RC Engine Part 21783000

O.S.OS Engine RC 21931000 Crankshaft Bearing (R) for 18TM

Ogawa Seiki 25303400 Piston Ring for .50SX-H 46FX-H 46SF OSMG7790 Black NEW

OS 22681980 Replacement Remote Control Engine Needle OS 25 32 46 61FX Engines

O.S. Engines: Cylinder Liner: 55HZ Hyper

OS Engines 91HZ Piston 29073200 NEW OEM Replacement

OS Engines Crankshaft Clamp 32/50/55 71530400 NEW OEM Replacement

OS Engines Piston Pin Retainer 50SX-H 55HZ/HZ-R 25217000 NEW OEM Replacement

OS Engines Front Bearing 37SZ-H 22831000 NEW OEM Replacement

OS Engines Piston Ring 70SZ-H 27003400 NEW OEM Replacement

OS Engines Piston 50SX-H 25203200 NEW OEM Replacement

OS Engines Gasket Set 37SZ-H 23424000 NEW OEM Replacement

O.S. OS Engine RC 25425400 Silencer Screw Set

OS Engines Exhaust Gasket 50SX 55HZ/HZ-R 72144040 *qty-1 ONLY* NEW

OS Engines Pressure Nipple M4 72145030 NEW OEM Replacement

OS Engines 24803412 Piston Ring 40F

OS Engines Rear Bearing 50SX 55HZ 55AX 25830010 NEW OEM Replacement

Copper Exhaust Gasket for YS Engines 91/96SRX 120SRX *Made in USA*

OS Engine 21SE, 21RF, 25FX, 32SX Crankshaft Ball Bearing F 22831000 New RC Nitro

OS Engines 72403070 High Pressure Check Valve 91HZ-R OSMG6007

OS Engines Front Bearing 50SX 55HZ 91HZ 105HZ 26731002 NEW OEM Replacement

OS Engines Piston 105HZ 105HZ-R 28703200 NEW OEM Replacement

OS Engines 91HZ Piston Ring 29503400 OEM Replacement

OS Engines 24881824 O-Ring IV/PRC #6H Rubber OSMG7372

OS Engines Piston Ring 105HZ 105HZ-R 29203400 NEW OEM Replacement

O.S. Engines: Gasket Head, .1mm: 105HZ

OS Engines 91HZ 105HZ Bearing Set Front & Rear OEM Replacement

OS Engines Piston Pin Retainer 37SZ-H 24517000 NEW OEM Replacement

Copper Exhaust Gasket for YS Engines 91ST 91SR 91SR-S *Made in USA*

OS Engines Carb Retainer 50SX-H 23981700 NEW OEM Replacement

O.S. Engines: Cylinder Liner: 105HZ

OS A3 (#6) Hot Glow Plug for .12-.18 Nitro Engines OSMG2690 OSM71605300

OS Engines Heatsink Head (Blue) 50SX-H 25204200 NEW OEM Replacement

O.S. Engines: Gasket Head, .2mm: 105HZ

OS Engines Carburetor Complete 60M-C 29183000 OEM Replacement

OS Engines Throttle Lever Assembly 29085140 NEW OEM Replacement

O.S. OS Engine RC 24007020 Cover Plate Unit for 40 46 LA

OS Engines Head Gasket 105HZ 0.2T 28704160 NEW OEM Replacement

OS Engines Non-Bubble Weight S 71531010 NEW OEM Replacement

OS Engines 91SZ 91HZ 105HZ Hardware Set OEM Replacement

OS Engines 105HZ 91HZ Connecting Rod 29505010 NEW OEM Replacement

O.S. Engines: Piston Ring: 108FSR (105HZ & 105HZ-R)

OS Engines Piston Ring 91HZ Speed 91HZ-R 29503400 NEW OEM Replacement

OS Engines Spinner Nut 23024008 For 20,25,RE

OS Engines Cylinder Liner 50SX-H Hyper 25203100 NEW OEM Replacement

OS Engines 91HZ 105HZ Connecting Rod 29505010 OEM Replacement

OS Engines 91HZ 105HZ Piston Pin Retainers 27917000 NEW OEM Replacement

OS Engines 91RZ-H Heatsink Head (cylinder head) 29064010 OEM Replacement

O.S. Crankcase For 21TM-T .21 Engine

OS Engines Helicopter Engine Replacement Piston Ring .55HZ .55 55 HZ 27703400

OS Engines Exhaust Gasket Set 50SX/55HZ/HZ-R 72144040 NEW OEM Replacement

OS Engines Cover Plate 50SX-H 25207001 NEW OEM Replacement Backplate

OS O.S. RC Engine Piston Ring GGT10 61SX RX SFN RFN FSR LX VF-H 26703404

O.S. FS-70S, FS-91 S SII, S II (P) Surpass Engine Valve Spring Retainer

OS Engines Rear Bearing 37SZ-H 21RZ 23730000 NEW OEM Replacement

OS Engines Cylinder Liner 37SZ-H 23413100 NEW OEM Replacement

OS Engines 91SZ-H Piston Pin 27006000 OEM Replacement

OS Engines Cylinder Liner 91SZ-H 29063100 NEW OEM Replacement

OS Engines Thrust Washer 50/55/61/70/91/105 46120000 NEW OEM Replacement

Best selling

OS Engines Front Bearing 37SZ-H 22831000 OEM Replacement

O.S. Engines 71913100 Motor Mount 46/55ax Osmg2774

29203400 Piston Ring 1.08 FSR OSMG7812 O.S. Engines

OS Engines Piston Ring .91 FX Osm29503400

O.S. Engines 26981000 61d Carburetor for 65ax Engine

OS Engines Piston Ring .46 Sf/h Osm25303400

OS Engines Carburetor #10g .15la Osm21783000

O.S. Engines A3 Glow Plug Hot Osm71605300

Review highlights

very good Piston Ring

Solid little plug

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OS Engines Exhaust Gasket 50SX 55HZ/HZ-R 72144040 qty-1 ONLY NEW

Copper Exhaust Gasket for YS Engines 91/96SRX 120SRX Made in USA

Copper Exhaust Gasket for YS Engines 91ST 91SR 91SR-S Made in USA