Off-Idle Passage - TOHATSU MFS 4 Service Manual

2) Off-Idle Passage

a - Air intake
b - Air vent inlet
c - Main air jet
d - Pilot air jet
e - Bypass port
f - Pilot outlet
g - Throttle valve
h - Fuel inlet
i - Main jet
j - Pilot jet
k - Choke valve
l - Main nozzle
m - Air bleed
å Air
∫ Air-fuel mixture
When throttle valve is turned to a position over bypass port, the bypass port is exposed to low pressure existing in the back
of throttle valve. The low pressure causes the fuel to be ejected from bypass port and idle port.
4st 4/5/6 2011
a
d
c
k
å
l m
e
j
b
l l
h h
i
<Over view>
g
f
4
<Side view>
∫
4-9