Evolution-engines 62GXI User Manual download pdf (Page 4)

Introduction

Thank you for purchasing the exciting new Evolution

62 GXI engine. A ﬁrst in gasoline RC engines,

the 62 GXI features a throttle body fuel injection system. No longer will you have to deal with

needle valve settings and tuning your engine. The 62 GXI automatically manages fuel metering,

letting you worry about more important things like ﬂying! Mounting the 62 GXI is simple with the

overall dimensions designed to ﬁt current giant-scale offerings. Because its prop, mufﬂer, and

mounting dimensions match other popular 50cc and 60cc engines, the 62 GXI is a drop-in ﬁt for

many existing 50 –60cc airframes.

62cc GXI Gas Engine Design

Building upon our proven small block gas engines, the 62 GXI takes ease of use and reliability to

the next level.

Step 1 Start with a ‘clean sheet of paper’. This is a completely new engine designed as a

powerhouse with user-friendly qualities for 50–60cc airplanes. Making the engine

powerful, reliable and easy to operate were key design considerations.

Step 2 Design a new throttle body fuel injector system around this engine. Fuel injectors have

never been used on gasoline RC engines, although they have become standard for other

industries like the automobile industry. Bringing this technology to RC engines enables

ﬂyers to enjoy more ﬂying time with less hassle.

Step 3 Include an effective, wraparound style in-cowl mufﬂer with the engine so ﬂyers won’t

have to source a mufﬂer before they can ﬂy.

Step 4 Design operating accessories that enhance the gasoline engine experience.

• The construction and reliability of the fuel delivery system to the fuel injector is

critical. Microscopic pieces of dirt will wreak havoc on the injection system. The

included Sintered Plastic Filter Clunk (EVOA121) takes care of the dirt problem.

It is mandatory to use the included ﬁlter to ensure trouble-free operation.

• The same holds true for air bubbles from the tank or any small leak in the

fuel tubing; even small bubbles are simply not tolerated in this system. The

included ﬁlter and tubing ensure no air bubbles affect the system.

• We found that popular gasoline fuel tubing has its weak points. Normal

Tygon

tubing (the go-to choice for gasoline engines) does not withstand high

temperatures well and tends to get stiff and brittle with use, and Neoprene

tubing tends to swell with exposure to gasoline. Swelling will eventually lead

to the fuel line slipping off if the line is not secured with a wire tie or similar.

Viton

tubing withstands not only the high temperatures, but its durability is

much greater than that of either Tygon or Neoprene. The added bonus is that

it ﬁts and holds well to the fuel ﬁttings without any need for additional wire

or tie-wrap keepers. We recommend you purchase Viton tubing for optimal

performance.

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Evolution-engines 62GXI User Manual Page 4