Smooth operation — Smaller size
NEW ENGINE，NEW DESIGN ！
New Engines, Small Size ,angled plug with 1/4-32 plugs.
It’s your very good choice for small size twin cylinder engine
 
Smooth operation — Smaller size.
NEW ENGINE，NEW DESIGN ！
Angled plug with 1/4-32 plugs.
It’s your very good choice for small size twin cylinder engine.
 
Type
2 cycle piston valve type gasoline engine for airplane
Displacement (cc)
40cc(2.44 cu.in)
Bore x Stroke (mm)
1.26 in(32mm) x 1.02 in (26mm)
Recommended props
19×8, 19×10, 20×8 & 20×10 
Maximum Output
4.6HP/8600rmp
Power supply
7.4V-14V
 
 
 
Carburetor : Walbro
Ignition : Stinger DC-CDI (Computer Controlled auto advance, electronic ignition system)
SPARK PLUG: M8(1/4-32)
Requires: Gasoline, 2-cycle oil, ignition battery & propeller
speed rang : 1500-8600rpm
Gasoline-Version : Pre-mixed Fuel, 25-40 (Gasoline):1 (recommended : 30:1) 
Lubrication Oil : High quality fully synthetic 2 cylinder oil such as Motul 800 2T 100% synthetic racing motro oil , Red line two-stroke racing motor oil , Stihl Ultra high performance 2 cycle fully synthetic engine oil etc . 
Break in Propeller : 19X8 (Standard Two leafs prop)
Cooling System : Air Cooled
RCGF Stinger Engine package Includes: electronic CDI ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual.
Weight:

Engine: 2.32 lb (1052g)
2XMuffler: 4.45 oz (126 g)
Ignition Module: 5.1 oz (145 g)
Total: Weight: 2.92 lb (1323 g)
Technical Data:

Ignition Battery: 7.4V-14VNiCd or NiMH, 7.4V LiFe or 2S LiPo pack
Gasoline/Oil Mix: 30:1
Replacement Spark Plug: M8 1/4-32 or equivalent
Idle Speed: 1500 rpm/min