REX340 EFI Engine
User Manual
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10
Fuel Ratio
Starting the Engine for the First Time
The engine uses a mixture of gasoline and two-stroke lubricant, and the ratio of gasoline to lubricant is 40:1.
The fuel injection system and the engine can be operated normally by using the fuel of this type and mixing
ratio.
Use high-quality 92# pure gasoline, and prohibit the use of ethanol gasoline.
Lubricant model: Red Line 2T, MOTUL 710/800.
1.When starting the engine for the first time (or without starting for a long time), first pull out the oil pipe from
the throttle valve inlet pipe;
2.Intermittently energize the ECU every 5 seconds until fuel flows out of the fuel pipe, re-insert the fuel pipe
and tighten the fuel pipe nut.Unless the engine fuel is exhausted or the oil circuit is disconnected for any
reason, there is no need to perform the first start process mentioned above;
3.Keep the throttle position at about 30%;
4.Use the starter to turn the propeller, and the engine starts and works.
Note: Since the engine needs to expel air from the oil circuit, it may be difficult to start the engine in
the first few minutes, it needs to be started several times. It is not recommended to use manual start
mode, this mode may not be able to start the engine.
5.Let the engine run for a few minutes to warm up.
6. Keep the full throttle for 15 seconds to ensure that the air in the fuel system is exhausted, and then reduce
the engine to idle speed.