Honda C65 - Float Chamber; Choke (Starting)

C ARBURETOR
39
=
e nt ers : ro - ··e • e· oo e · g <D
: ~ ::: - ~ e ou si de of · r-e • s::: -e jp wh ere
= :::: ::::- d th en en ers ·-e ::: eeo hol e @ of
- ?' On he oi e· o"'d, the fuel f rom
:::- ::.-::~ her @ after be in g me ered by the pilot
::: ::::-o m et er ed a ga in at the iet area @ of
-= ~ =~· je @, mixes with the air from the bleed
-:: e g wit hin the slow iet and is s prayed out at the
:: :: - om of th e th r ottl e valve @ from the pilot outlet
2 ·o m ix wit h the main flo w of air from the cor-
:;_·e · or a ir inlet <D and is then taken into the engine.
• f OAT CHAMBER
I is necessary for the carburetor to supply the
:: ·o per fuel mix ture for the respective throttle opening
::- d engine s peed ; in order to do this, the fuel level
be maintained at a constant level. It is the
: c
ti on of the float chamber to perform this ta sk .
The
DP type carburetor incorporate s o fi lter in the
"'o o ch amber to prevent entry of dust.
The
fuel from the tonk flows thr ough the groo ve
H in the fuel cock, enters the s tra iner compartment
~ wh er e the dust and foreign matte rs in th e fuel ore
a
l ow ed to settle, passes through th e filter @ and then
en 'ers the float chamber @. As the fuel level in the
"'oo chamb er rises, the flo at @ becomes bouyant
:: d ap plies pressure against the v alve spring @ to
ov erri de it and then fo rces the flo at valve @ against
· e valve seat @ to stop the flow of the fuel.
hen the fuel in the float chamber @ is consumed,
·. caus es a lowering of the fuel level and a con.
sequent lowering of the float @, this causes the float
·a lv e @ to unseat and permits the fuel to enter the
"'o at chamber. This proces s is repeated to maintain
a
con stant fuel level in the float chamber. A spring
:g is in co rporated between the float and the top of
. e flo at v alve to prevent the oscillation of the float
.alve and reduce wear to the valve seat @. Further,
·o or ev ent overflowing of the carburetor and causing
· ~ e floo ding of the cylinder due to tilting or the float
.ol e st ick ing open, an overflow pipe is incorporated
·o dr a in o ff any fuel which exceeds the critical fuel
e .. el.
In ad diti on a static air v ent tube is located in the
:- a chamber and is vented at the front cover to
- o· a in th e air pressure in the float chamber always
::o- .ant wit h the outside atmosphere and whi ch is
- ~- a'fec te d by riding speed or outside wind condition.
OKE (STARTING)
ring co ld weather starting , it may be necessary
_ ·~·t i a ll y us e a rich fuel mixture. For this purpose,
:::: c o e valve @ is incorporated . The choke valve
::: ·s clos ed by raising the choke lever @, this
· e_ •· s th e air and allows the fuel sprayed from the
· eeo e je ® to enter the engine as a rich fuel
- x · e.
@ Sp r ing
:§) eed le je t
@ Pi lot outlet
Figure 3-95. Carburetor cross sectional diagram