Spark Plug; Troubleshooting Guide; Engine Specifications; 80Gx Evolution Engine Dimensions - Evolution 80GX User Manual

Troubleshooting Guide

If the engine does not start
- check and use a new spark plug if needed.
(Check the spark: Put the plug into the cable end and by turning
the engine you'll see the necessary spark. Note: The plug must
touch a metal part of the engine.)
- check fuel lines.
- check for proper mechanical function by turning the
engine over.
- check that the carburetor is correctly installed.
- remove the carburetor cover from the feed side; check
the filter and blow off carburetor with compressed air
( CAUTION: When using compressed air, use eye protection.);
when reassembling be careful to maintain the proper order of
the components.
- check the vacuum feed line.

Engine Specifications

Bore 48mm
Stroke 44mm
Displacement 80cc / 4.9 cu in
Weight without ignition* 2220 g / 78.3 oz
Weight of ignition unit 190 g / 6.7 oz
* The value in the table above stands for the weight of a completely assembled engine, including the spark plug, carburetor, drive washer
and prop screws.

80GX Evolution Engine Dimensions

A
mm
157
F
mm
6.6
9
Mechanical Faults
If the engine can not be turned over easily
- a likely cause is the piston in the cylinder is seized: loosen
and unscrew the cylinder bolts.
- carefully remove the cylinder.
- visually examine the piston and crankcase to find the likely cause
of the engine's mechanical problem.
Note: Mechanical repairs must always be completed by a professional
service department.
1000–7500 rpm
RPM range
Fuel
Unleaded 91-octane
Lubrication Break-in Oil with gasoline
in mixture 1:30
Lubrication/Standard Oil with gasoline
in mixture 1:40
B C D E
mm mm mm mm
148 83 90 90
G H I J
mm mm mm mm
M10x1 55 26 204
80GX
Part # Description Part #
EVO30070101 Crankcase EVO30010406
EVO30070202 Front Bearing EVO30070407
EVO30070203 Rear Bearing EVO30070701
EVO30070204 Packing EVO30070702
EVO30070206 Crankshaft Retaining Ring EVO30070801
EVO30070301 Rear Cover EVO30070802
EVO30010302 Rear Cover Screw Set EVO30070951
EVO30070303 Rear Cover O-Ring EVO30010904
EVO30940304 Pressure Nozzle EVO30071001
EVO30940305 Pressure Nozzle Gasket EVO30050102
EVO30070401 Cylinder
EVO3007i1101
EVO30010402 Cylinder Screw Set EVO30041102
EVO30010403 Cylinder Nut
EVO30011103
EVO30070404 Cylinder Gasket EVO30071104
EVO30010405 Exhaust Screw Set
EVO30011105
Description Part # Description
Exhaust Nut EVO30101107 Propeller Screw Set
Exhaust Flange Gasket EVO30070306 Carburetor Flange
Piston EVO30010307 Carburetor Flange Gasket
Piston Ring EVO30070308 Carburetor Flange Screw Set
Piston Pin EVO30101301 Reed Valve Case
Piston Pin Retainer EVO30101302 Reed Valve
Connecting Rod EVO30011303 Reed Valve Screws
Connecting Rod Washer EVO30101304 Reed Valve Gasket (Upper)
Crankshaft EVO30101305 Reed Valve Gasket (Bottom)
Crankcase Screw Set EVO30101306 Reed Valve Strap
Prop Drive Washer 80GX EVO30071307 Carburetor Bolt/Screws (2pcs)
Drive Washer Key EVO3314LB Electronic Ignition Unit Type 2
Propeller Nut EVO30013309 Spark Plug (Sm Cap)
Propeller Washer EVO30941405 Ignition Sensing Fixing Screws
Propeller Screw EVO3227 Carburetor
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