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 re-assembling be careful to maintain the proper order of
the components.
- check the vacuum feed line.
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.
Troubleshooting Guide
Engine Specifications
Bore
Stroke
Displacement
Weight without ignition*
Weight of ignition unit
RPM range
8mm
8mm
5cc / . cu in
190 g / 5.5 oz
15 g / 5.8 oz
1000–7500 rpm
Maximum power output**
Maximum torque**
Gasoline
Lubrication
5. hp / 00 rpm
. ft-lb / 100 rpm
Unleaded 95-octane
Oil w/gasoline
in mixture 1:0
* 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.
** Power output varies with the exhaust used. The value given in the table stands for the maximum available power output.
Bore
Stroke
Displacement
Weight without ignition*
Weight of ignition unit
RPM range
mm
mm
58cc / . cu in
180 g / . oz
15 g / 5.8 oz
1000–7500 rpm
Maximum power output**
Maximum torque**
Fuel
Lubrication
8.5 HP / 950 rpm
5.1 ft-lb / 00 rpm
Unleaded gasoline
Oil w/gasoline
in mixture 1:0
58GX
5GX
8103.3_EVO_4558.manual.indd 6
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