Shindaiwa 300 Service Manual page 8

Troubleshooting
The 2-Stroke Cycle Engine
Section
2
4. Power (combustion)
The fuel-air mi xture xpands rapldly as il
burns , forclng he plston dawn he cytlr der.
Pistan movement is transferred to tlle eran ­
shaft thraugh the cannecting rad rotatmg ti e
crankshalt.
5. Exhaust
Expan Ing gas es contlnue
t
fa ce Ihe pistan
downward, exposlng the exhaus! port Mas! of
the spent combustlOn gasse are expelled
through the exhaust port
6. Transfer
The plston's downward movemel l c;overs tI'le
Intake port and uncovers the transler por!
hile simultaneously compressing the res h
fuel -ai r mi xture drawn into the crankcase
during S ep 1, As the ¡ransler porl is uncov­
ered, the
f
esh mi ture sWlfls rapidly Irlto tlle
cylinder
As the Iresh fuel-alr m xture nters he
cylinder It also helps to oush or scavenge any
FIgW8
?
2
Ttle burning mixture expands for ing
1/)",
remalning exhaust gasses out througn the oistun down and compressmg ¡he Iresh r71l~tllf
1I
the
cr3nkcas ' As Ihe plston exposes lile tlansfer por
exhaust porL
crankcase pressure {orces rresh mixture
¡neo
the
combustlon chamber and Ilelps pus/] 'he remamine
8\haust gasses fhroug/l the exhausf port _ _ _ __
7