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2-Stroke Engine Hobby RC Gas/Nitro Engines for OS Helicopters

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Best selling

See All
  • O.S. MAX-55HZ Hyper Helicopter Engine (15630)

    O.S. MAX-55HZ Hyper Helicopter Engine (15630)

    $354.99 New
  • OS Max 46ax II 15490 NITRO RC Model Airplane Engine With E-3071 Silencer

    OS Max 46ax II 15490 NITRO RC Model Airplane Engine With E-3071 Silencer

    (2)
    $184.90 New
  • OS Engines Piston Ring .91 FX Osm29503400

    OS Engines Piston Ring .91 FX Osm29503400

    (10)
    $24.24 New
  • OS Ma Gas/Nitro Model Airplane Engine Rear Cover Back Plate 1607 Japan

    OS Ma Gas/Nitro Model Airplane Engine Rear Cover Back Plate 1607 Japan

    $79.99 New
  • O.S. Engine R/C Needle Valve Assembly FS-26S FS-40 FS-40S Four Stroke 45281910

    O.S. Engine R/C Needle Valve Assembly FS-26S FS-40 FS-40S Four Stroke 45281910

  • Vintage K&B 6557 Drive Collet NewInPack USA Shipped

    Vintage K&B 6557 Drive Collet NewInPack USA Shipped

  • OS Speed 91HZ-R 3D Engine 18642

    OS Speed 91HZ-R 3D Engine 18642

    $565.55 New

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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

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  • Toys & Hobbies
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  • Gas/Nitro Engines
  • 2-Stroke Engine Hobby RC Gas/Nitro Engines for OS Helicopters

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  • Engine, Exhaust & Fuel Systems
    • Gas/Nitro Engines
    • Electric Motors
    • Exhaust Systems & Mufflers
    • Fuel Delivery & Accessories
    • Ignition, Glow & Spark Plugs
    • Motor & Engine Parts & Accs
    • Oils, Lubricants & Maintenance
    • Other Engine/Exhaust/Fuel Sys.
    • O.S. 2-cycle Model Engine R.C. Carberator (60L R.C Engine Carberator - Image 1 of 4
    • O.S. 2-cycle Model Engine R.C. Carberator (60L R.C Engine Carberator - Image 2 of 4
    • O.S. 2-cycle Model Engine R.C. Carberator (60L R.C Engine Carberator - Image 3 of 4
    • O.S. 2-cycle Model Engine R.C. Carberator (60L R.C Engine Carberator - Image 4 of 4

    O.S. 2-cycle Model Engine R.C. Carberator (60L R.C Engine Carberator

    $49.50
    $7.67 shipping
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    • O.S.MAX-70SZ-H 11.5cc 2 cycle glow engine for R/C helicopters New f/s - Image 1 of 4
    • O.S.MAX-70SZ-H 11.5cc 2 cycle glow engine for R/C helicopters New f/s - Image 2 of 4
    • O.S.MAX-70SZ-H 11.5cc 2 cycle glow engine for R/C helicopters New f/s - Image 3 of 4
    • O.S.MAX-70SZ-H 11.5cc 2 cycle glow engine for R/C helicopters New f/s - Image 4 of 4

    O.S.MAX-70SZ-H 11.5cc 2 cycle glow engine for R/C helicopters New f/s

    $240.55
    or Best Offer
    Free shipping
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  • OS Engines Ogawa Seiki Max 46FX-H Ring with 40C Carburetor Free Shipping From JP - Image 1 of 1

    OS Engines Ogawa Seiki Max 46FX-H Ring with 40C Carburetor Free Shipping From JP

    $300.99
    Free shipping
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    • OS Engines MAX-21TM W/ 11K Carb & T-Maxx Manifold RC Nitro 2 Stroke Engine 12240 - Image 1 of 4
    • OS Engines MAX-21TM W/ 11K Carb & T-Maxx Manifold RC Nitro 2 Stroke Engine 12240 - Image 2 of 4
    • OS Engines MAX-21TM W/ 11K Carb & T-Maxx Manifold RC Nitro 2 Stroke Engine 12240 - Image 3 of 4
    • OS Engines MAX-21TM W/ 11K Carb & T-Maxx Manifold RC Nitro 2 Stroke Engine 12240 - Image 4 of 4

    OS Engines MAX-21TM W/ 11K Carb & T-Maxx Manifold RC Nitro 2 Stroke Engine 12240

    $349.99
    $11.99 shipping
    Only 2 left
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  • Thunder Tiger Engine - 9141 PRO-46 ABC RC - NIOB - Image 1 of 4

    Thunder Tiger Engine - 9141 PRO-46 ABC RC - NIOB

    (2)
    $99.00
    $9.45 shipping
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  • 4 NEW - OS Max FP / LA Venturis 6.45mm (0.256") fits FP 20/25/35/40, LA 25/40/46 - Image 1 of 4

    4 NEW - OS Max FP / LA Venturis 6.45mm (0.256") fits FP 20/25/35/40, LA 25/40/46

    $25.98
    $5.98 shipping
    Only 1 left!
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  • OS Max Carb Carburetor 4BK Carburetor Set: Fits 40 FSR 45 FSR 40 FS 45 ABC - Image 1 of 2

    OS Max Carb Carburetor 4BK Carburetor Set: Fits 40 FSR 45 FSR 40 FS 45 ABC

    $50.00
    $7.01 shipping
    0 bids
    3h 58m
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  • OS Max Carb Carburetor 4BK Carburetor 4 BK : Fits OS 40 FSR, 45 F SR and others - Image 1 of 3

    OS Max Carb Carburetor 4BK Carburetor 4 BK : Fits OS 40 FSR, 45 F SR and others

    $39.85
    $6.92 shipping
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  • NEW 6.45mm (0.256") OS Max FP / LA Venturi fits FP 20, 25, 35, 40, LA 25, 40, 46 - Image 1 of 4

    NEW 6.45mm (0.256") OS Max FP / LA Venturi fits FP 20, 25, 35, 40, LA 25, 40, 46

    $8.98
    $5.92 shipping
    17 sold
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  • RC BEARINGS Thunder Tiger engine TT Pro 40 46 /TT 50 RL heli 56 BEARINGS ABEC3c3 - Image 1 of 3

    RC BEARINGS Thunder Tiger engine TT Pro 40 46 /TT 50 RL heli 56 BEARINGS ABEC3c3

    $6.75
    $5.27 shipping
    30 sold
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  • O.S. MAX 25FSR Engine OS Ogwa Seiki For Helicopters & 25-Class Pattern Models - Image 1 of 4

    O.S. MAX 25FSR Engine OS Ogwa Seiki For Helicopters & 25-Class Pattern Models

    $160.00
    $20.00 shipping
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  • OS 46 AX engine 55 OS 46 FX 40 engine OS 50 FSR BEARINGS ABEC3c3 SAITO 82 FA 91 - Image 1 of 3

    OS 46 AX engine 55 OS 46 FX 40 engine OS 50 FSR BEARINGS ABEC3c3 SAITO 82 FA 91

    $6.95
    $5.27 shipping
    Only 3 left
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  • O.S. MAX 91 SX Engine SX-91 Helicopter Engine OS Ogwa Seiki R/C Airplane Engine - Image 1 of 4

    O.S. MAX 91 SX Engine SX-91 Helicopter Engine OS Ogwa Seiki R/C Airplane Engine

    $190.00
    $20.00 shipping
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  • OS Engines 55HZ Hyper 40L .55 RC Nitro 2 Stroke Helicopter Engine 15630 - Image 1 of 3

    OS Engines 55HZ Hyper 40L .55 RC Nitro 2 Stroke Helicopter Engine 15630

    $354.99
    $11.99 shipping
    Only 2 left
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  • OS MAX FP 40 Nitro R/C Engine With Exhaust Pipe Selling As Parts Has Compression - Image 1 of 4

    OS MAX FP 40 Nitro R/C Engine With Exhaust Pipe Selling As Parts Has Compression

    $39.99
    or Best Offer
    $10.50 shipping
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  • OS Speed 91HZ-R 3D Engine : 18642 - Image 1 of 4

    OS Speed 91HZ-R 3D Engine : 18642

    $599.95
    $10.00 shipping
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  • O.S. Engine Max 25SF Airplane ABC (New) with muffler Made in Japan - Image 1 of 4

    O.S. Engine Max 25SF Airplane ABC (New) with muffler Made in Japan

    $199.99
    or Best Offer
    $25.00 shipping
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  • OS Max .25 FP R/C Engine And Muffler for Model Airplane Untested - Image 1 of 4

    OS Max .25 FP R/C Engine And Muffler for Model Airplane Untested

    (2)
    $49.99
    $7.99 shipping
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  • Used OS Max Carb Carburetor #40D: Fits 40LA 46LA - OSMG2421 - Image 1 of 1

    Used OS Max Carb Carburetor #40D: Fits 40LA 46LA - OSMG2421

    (5)
    $22.85
    $6.92 shipping
    13 watching
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  • O.S. Engine Max 32SX-H Ring (Recoil Starter version) New Made in Japan - Image 1 of 4

    O.S. Engine Max 32SX-H Ring (Recoil Starter version) New Made in Japan

    $219.99
    or Best Offer
    $25.00 shipping
    10 watching
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  • OS engine 91 FX OS 91 Engine SX HELI BEARINGS OS SZ-H 91 OS 70 SZH ABEC3 - Image 1 of 1

    OS engine 91 FX OS 91 Engine SX HELI BEARINGS OS SZ-H 91 OS 70 SZH ABEC3

    $8.22
    $5.29 shipping
    Only 2 left
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  • OS Max 46 LA - BLUE RC Engine - NIB 13390 - Image 1 of 4

    OS Max 46 LA - BLUE RC Engine - NIB 13390

    (4)
    $179.99
    or Best Offer
    $14.85 shipping
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  • New OS Max Carb Carburetor 20 F 20F Fits 32SX Engine - Image 1 of 1

    New OS Max Carb Carburetor 20 F 20F Fits 32SX Engine

    $39.85
    $6.92 shipping
    2 watching
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  • OS Max 61LX-H Nitro Helicopter Engine NIB NOS - Image 1 of 4

    OS Max 61LX-H Nitro Helicopter Engine NIB NOS

    $209.99
    or Buy It Now
    $3.50 shipping
    0 bids
    2d 7h
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  • Thunder Tiger PRO-46-9141-RC Model Airplane Engine New - Image 1 of 3

    Thunder Tiger PRO-46-9141-RC Model Airplane Engine New

    (2)
    $103.00
    $7.79 shipping
    10 bids
    5h 18m
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  • O.S. Engine R/C Needle Valve Assembly FS-26S FS-40 FS-40S Four Stroke 45281910 - Image 1 of 1

    O.S. Engine R/C Needle Valve Assembly FS-26S FS-40 FS-40S Four Stroke 45281910

    $59.99
    or Best Offer
    Free shipping
    6 watching
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  • O.S. Engine Max 61FX Airplane ABC (New) with muffler Made in Japan - Image 1 of 4

    O.S. Engine Max 61FX Airplane ABC (New) with muffler Made in Japan

    $219.99
    or Best Offer
    $30.00 shipping
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  • O.S. Engine Max 50SX Airplane Ring (New) with muffler Made in Japan - Image 1 of 4

    O.S. Engine Max 50SX Airplane Ring (New) with muffler Made in Japan

    $189.99
    or Best Offer
    $25.00 shipping
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  • O.S. MAX-46AX (15480) 2 stroke glow engine for R/C airplane, used f/s - Image 1 of 4

    O.S. MAX-46AX (15480) 2 stroke glow engine for R/C airplane, used f/s

    (1)
    $130.55
    or Best Offer
    Free shipping
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  • O.S.MAX-55HZ HYPER (15630) “8.93cc” 2 stroke glow engine for R/C helicopter, f/s - Image 1 of 1

    O.S.MAX-55HZ HYPER (15630) “8.93cc” 2 stroke glow engine for R/C helicopter, f/s

    $365.55
    or Best Offer
    Free shipping
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  • O.S. MAX-105HZ (18700) R/C 2stroke glow engine for 91class helicopter f/s - Image 1 of 4

    O.S. MAX-105HZ (18700) R/C 2stroke glow engine for 91class helicopter f/s

    $475.00
    or Best Offer
    Free shipping
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  • OS Max-S 30RC Control Line Model Airplane Engine - Image 1 of 4

    OS Max-S 30RC Control Line Model Airplane Engine

    $74.97
    Was: $87.97was - US $87.97
    or Best Offer
    Free shipping
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  • O.S. Engine Max 91FX Airplane Ring (New) with muffler Made in Japan - Image 1 of 4

    O.S. Engine Max 91FX Airplane Ring (New) with muffler Made in Japan

    $269.99
    or Best Offer
    $30.00 shipping
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  • OS Engine 25425600 Muffler Extension Adapter E-3070 873 OSMG2578 .46 .55 FX AX - Image 1 of 3

    OS Engine 25425600 Muffler Extension Adapter E-3070 873 OSMG2578 .46 .55 FX AX

    (5)
    $23.95
    Free shipping
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  • OS O.S. .50 50 SX-H SXH Hyper Ringed Competition Helicopter Engine OSM15550 - Image 1 of 4

    OS O.S. .50 50 SX-H SXH Hyper Ringed Competition Helicopter Engine OSM15550

    (2)
    $310.95
    Free shipping
    33 watching
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  • OS O.S. RC Remote Control Airplane Engine Prop Propeller Washer .65 AX 28009002 - Image 1 of 2

    OS O.S. RC Remote Control Airplane Engine Prop Propeller Washer .65 AX 28009002

    (3)
    $11.45
    Free shipping
    8 watching
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  • OS Engines Engine Nipple Pressure Fitting Number 7 #7 22681957 OSMG6991 OS .52 - Image 1 of 2

    OS Engines Engine Nipple Pressure Fitting Number 7 #7 22681957 OSMG6991 OS .52

    $12.95
    Free shipping
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  • OS Max 20 FP 12311 Engine and Muffler NIB. Now With 8 Accessories - Image 1 of 4

    OS Max 20 FP 12311 Engine and Muffler NIB. Now With 8 Accessories

    $175.00
    or Best Offer
    $10.82 shipping
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  • O.S.SPEED 91HZ-R 3D (18642) “14.95cc” 2-stroke glow engine for R/C helicopte f/s - Image 1 of 1

    O.S.SPEED 91HZ-R 3D (18642) “14.95cc” 2-stroke glow engine for R/C helicopte f/s

    $565.55
    or Best Offer
    Free shipping
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  • OS Engines 105HZ Hyper 1.05 RC Nitro 2 Stroke Helicopter Engine 18700 - Image 1 of 3

    OS Engines 105HZ Hyper 1.05 RC Nitro 2 Stroke Helicopter Engine 18700

    $499.99
    $14.99 shipping
    Only 2 left
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  • O.S. Helicopter Engine Max 46FX-H Ring Unused Made in Japan - Image 1 of 4

    O.S. Helicopter Engine Max 46FX-H Ring Unused Made in Japan

    $169.99
    or Best Offer
    $25.00 shipping
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  • New In Box Old Stock VINTAGE OS MAX 15 R/C Model AIRPLANE ENGINE With Muffler - Image 1 of 4

    New In Box Old Stock VINTAGE OS MAX 15 R/C Model AIRPLANE ENGINE With Muffler

    $149.99
    or Best Offer
    $11.00 shipping
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  • OS MAX 15 III 3 R/C ENGINE -preowned With Box - Image 1 of 4

    OS MAX 15 III 3 R/C ENGINE -preowned With Box

    $55.00
    $9.95 shipping
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  • OS Max 21 RG Nitro R/C Car Engine - Image 1 of 4

    OS Max 21 RG Nitro R/C Car Engine

    $200.00
    or Best Offer
    $11.80 shipping
    10 watching
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  • O.S. Engines OS MAX 40 LA RC Nitro Model Airplane Engine 13381 Silver - Image 1 of 4

    O.S. Engines OS MAX 40 LA RC Nitro Model Airplane Engine 13381 Silver

    $45.00
    or Best Offer
    $11.40 shipping
    0 bids
    6d 3h
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  • NEW #204 Robart Super Fueler NOS - Image 1 of 4

    NEW #204 Robart Super Fueler NOS

    $7.49
    or Best Offer
    $4.99 shipping
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  • Vintage K&B No. 5900 Sportster .45 R/C Airplane Engine with Muffler-NEW-Orig BOX - Image 1 of 4

    Vintage K&B No. 5900 Sportster .45 R/C Airplane Engine with Muffler-NEW-Orig BOX

    (4)
    $129.00
    $11.71 shipping
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  • SAITO engine 91 FS SAITO engine 90FA / OS46 FX 50 55 AX BEARINGS ABEC3c3 /3 SETS - Image 1 of 3

    SAITO engine 91 FS SAITO engine 90FA / OS46 FX 50 55 AX BEARINGS ABEC3c3 /3 SETS

    $15.59
    $5.49 shipping
    8 watching
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  • OS Max 120AX Glow Engine 2005-2008 Tested Original Box and Documents, Free Ship - Image 1 of 4

    OS Max 120AX Glow Engine 2005-2008 Tested Original Box and Documents, Free Ship

    (1)
    $120.00
    Free shipping
    17 watching
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  • O.S. Engine Max 25SF ABC RS Airplane Engine (Used) with muffler Made in Japan - Image 1 of 4

    O.S. Engine Max 25SF ABC RS Airplane Engine (Used) with muffler Made in Japan

    $21.50
    $7.36 shipping
    2 bids
    2d 6h
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  • OS Engine Fuel Pump PD-C3-PRICE REDUCED!!! - Image 1 of 2

    OS Engine Fuel Pump PD-C3-PRICE REDUCED!!!

    $39.95
    $8.95 shipping
    16 watching
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  • O.S. Engine Max 15LA Airplane ABC (New) with muffler Blue Made in Japan - Image 1 of 4

    O.S. Engine Max 15LA Airplane ABC (New) with muffler Blue Made in Japan

    $129.99
    $25.00 shipping
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  • O.S. Engine R/C Needle Valve Assembly FS-26S,40S Four Stroke 45281910, NIP - Image 1 of 4

    O.S. Engine R/C Needle Valve Assembly FS-26S,40S Four Stroke 45281910, NIP

    $47.50
    or Best Offer
    $9.91 shipping
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  • SAITO FA 40a engine MAGNUM 25-XL RC BEARINGS PRO XL-28 engine & ASP-25 ABEC3/c3 - Image 1 of 2

    SAITO FA 40a engine MAGNUM 25-XL RC BEARINGS PRO XL-28 engine & ASP-25 ABEC3/c3

    $6.99
    $5.29 shipping
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  • New OS MAX .46 AX II RC Airplane Engine With Muffler Two Stroke #15490 - Image 1 of 3

    New OS MAX .46 AX II RC Airplane Engine With Muffler Two Stroke #15490

    (2)
    $184.90
    Free shipping
    Only 2 left
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  • OS 105HZ-R Helicopter Engine 18750 - For R/C Model Helicopter - Image 1 of 4

    OS 105HZ-R Helicopter Engine 18750 - For R/C Model Helicopter

    $475.00
    $12.85 shipping
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  • OS MAX #OS-703 MODEL AIRPLANE ENGINE MUFFLER - AS IS. - Image 1 of 4

    OS MAX #OS-703 MODEL AIRPLANE ENGINE MUFFLER - AS IS.

    (1)
    $12.99
    or Best Offer
    $8.75 shipping
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  • OS O.S. Engines Replacement RC .91 91FX .95 95 AX Piston Ring OSMG7806 29503400 - Image 1 of 3

    OS O.S. Engines Replacement RC .91 91FX .95 95 AX Piston Ring OSMG7806 29503400

    (10)
    $30.95
    Free shipping
    22 sold
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  • OS Engine MAX 105HZ-R [18750] O.S JAPAN MADE NEW - Image 1 of 1

    OS Engine MAX 105HZ-R [18750] O.S JAPAN MADE NEW

    $561.15
    Free shipping
    10 watching
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  • MAX-55HZ (40L) O.S helicopter engine 15630 Ogawa Seiki R.C Hobby Gas Nitro - Image 1 of 1

    MAX-55HZ (40L) O.S helicopter engine 15630 Ogawa Seiki R.C Hobby Gas Nitro

    $395.00
    $21.99 shipping
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