Product Sections

Main Pages

New Products

Kill Switch for Magneto type ignitions

Kill Switch for Magneto type ignitions

18.50

This device made for us by the team that make our on board glow systems, allows you to remotely kill your Zenoah or other magneto type ...
find out more

Geared Starter Battery Carrier

Geared Starter Battery Carrier

8.50

Especially designed to fit the 4:1 and 6.5 : 1 geared starter. Laser cut from zinc plated steel the battery carrier bolts to the starter to carry most sizes of battery, ...
find out more

GF38 Prop nut and Lock nut

7.50


find out more

Walbro HDA Repair Kit

Walbro HDA Repair Kit

15.60

Contains all the filters and diaphragms needed to overhaul any Walbro HDA carb.
find out more

BCMIOS46LA

BCMIOS46LA

39.54

BCM Inverted Muffler for OS 40/46LA also fits most engines with 35mm fixings, including OS 35AX, ASP/SC 32/36 and Irvine 36/39. Fixing holes at 35mm centres. Dimensions:a=68mm b=49mm c=19mm ...
find out more

BCMIEV20RC - BCM 5619

BCMIEV20RC - BCM 5619

75.58

BCM Inverted muffler for the Evolution 20cc petrol engine with a cut away for round cowl. Dimensions: A=90mm D=64mm L=115mm W=30mm. The exhaust flange is 12mm thick.
find out more

BCMWADL55B - BCM 10514

BCMWADL55B - BCM 10514

144.00

Wrap Around Inverted muffler for DLE55 with extra noise reduction. Dimensions A=3mm, B=76mm, C=25mm D=50mm. The exhaust flange is 10mm thick.
find out more

BCMIDL35 - BCM 10506

BCMIDL35 - BCM 10506

78.60

BCM Inverted muffler for the DL35 rear exhaust. Dimensions A=76mm B=51 C=115mm. The exhaust flange is 10mm thick.
find out more

BCMIOSGT33 - BCM 4034

BCMIOSGT33 - BCM 4034

75.58

BCM Inverted muffler for the OS GT33cc petrol engine. Dimensions A=76mm D=82mm L=102mm W=32mm. The exhaust flange is 32mm thick.
find out more

Zenoah G800BPU 80cc Flat Twin Aero Engine

Zenoah G800BPU  80cc Flat Twin Aero Engine

599.00

!!<Specification:

Cylinder displacement: 79.9 cm / 4.88 cu.inch
Cylinder bore: 40.5 mm / 1.59 inch
Cylinder stroke: 31 mm / 1.22 inch
Power output: 4.34 kW
Carburettor: ...
find out more

Zenoah G62PU 62cc Aero Engine

Zenoah G62PU  62cc Aero Engine

310.00

!!<Specification:

Cylinder displacement: 62 cm / 3.78 cu.inch
Cylinder bore: 47.5 mm / 1.87 inch
Cylinder stroke: 35 mm / 1.38 inch
Power output: 3.15 kW
Carburettor: ...
find out more

G450PU 45cc Aero Engine

G450PU 45cc Aero Engine

299.00

45cc Side exhaust petrol Engine with Zenoah Magneto ignition as standard !!<Specification:

Cylinder displacement: 45 cm / 2.75 cu.inch
Cylinder bore: 43 mm / ...
find out more

Zenoah G380PU 38cc Rear Exhaust Aero Engine

Zenoah G380PU  38cc Rear Exhaust Aero Engine

238.00

38cc rear exhaust engine with magneto ignition as standard !!<Specification:

Cylinder displacement: 37.4 cm / 2.28 cu.inch
Cylinder bore: 38 ...
find out more

Zenoah G260PU 26cc Aero engine

Zenoah G260PU  26cc Aero engine

244.00

!!<Specification:

Cylinder displacement: 25.4 cm / 1.55 cu.inch
Cylinder bore: 34 mm / 1.34 inch
Cylinder stroke: 28 mm / 1.1 inch
Power output: 1.62 ...
find out more

1/8 Robart "T" couplers (pack of four)

6.50

For joining fuel tube good for glow or petrol. !!<Glow OnlyPetrol Only Suitable for Glow fuel ...
find out more

OS GF40 Four Stroke Petrol Engine

Just Engines Online | Petrol Engines | OS Petrol Engines |  OS GF40 Four Stroke Petrol Engine

OS GF40 Four Stroke Petrol Engine.

OS GF40 Four Stroke Petrol Engine.

Price: 610.00 (Including VAT at 20%)

Quantity:




This the first four stroke Petrol from OS engines. It dose exactly as it says, you get the benefits of a petrol; economy, reliable tick over and cleanliness in a four stroke.




  • Quick, powerful response makes it an ideal choice for aerobatic as well as scale models.
  • Perfect for scale aircraft, with a deeper exhaust tone that mimics the sound of full-size aircraft.
  • Features the GT33s mounting bolt pattern and mount-to-drive hub distance.
  • Outstanding fuel economy - runs on a mix of engine oil and standard petrol.
  • Rear-mounted carb designed by O.S. & Walbro.
  • Lightweight ignition module accepts NiCd, NiMH, LiPo or LiFe battery power.
  • Muffler and integral backplate mount included.
  • PCV (Positive Crankcase Ventilation) system recirculates blow-by gas and oil waste for a cleaner engine and environment.


Displacement:2.438 cu in (39.96 cc)
Rpm Range: 1800-9000
Output: 3.75 hp @ 8600 rpm
Weight: Engine:41.3 oz (1170 g) / Muffler:4.0 oz (113 g) Ignition Module:3.4 oz (95 g)
Includes: F-6040 muffler assembly, ignition module & CM-6 spark plug
Recommended props: 13x8, 13x9, 13x10, 13x11, 14x8, 14x9, 14x10, 15x6, 15x7, 15x8

Parts and Sizes

Parts and Sizes

click image or here for parts explosion PDF

Just Engines Online | Petrol Engines | OS Petrol Engines |  OS GF40 Four Stroke Petrol Engine