Rotate the crankshaft and look at the comparator. During the compression stroke you see that the pointer of the dial gauge
rotates clockwise.
When the piston reaches the TDC, the pointer stops. If you continue to rotate the crankshaft, the pointer moves anticlockwise,
and indicates that the piston has passed the TDC. This way you can easily nd the TDC.
When you have found the TDC, you can mount the magneto ywheel.
The position of the ywheel is correct if the mark is aligned to the edge of the ignition coil (see picture on the right of Figure 9).
If the position corresponds to the one in the picture, you can tighten the ywheel nut.
The next step is to check the gap between the ywheel and the ignition coil. It must be of 0,4mm. To make an accurate setting
you must use a feeler gauge (see Figure 10).
Spark plug
We recommend you to use a NGK B10ES spark plug.
The spark tightening torque is 20 - 22 Nm.
You can also check the spark plug and “read the color”.
The condition of an engine can be judged by the appearance of the spark plug’s ring end. If the ring end of a spark plug is
brown or hazelnut color, the condition is good and the spark plug is functioning well. Dark brown
color indicates that you are using a too rich content mixture. Instead, a grey color indicates a too lean mixture.
Check the electrode gap and adjust again, if necessary, to 0,8mm (see Figure 11).
engine for emotion
ROS motor
LIGHT FLY ENGINES
To Next Page
Loading...
Need help?
General
