Idl Ing Speed - MOTO GUZZI Stornello sportcc Owner's Manual

Indications of too rich a mixture are: excessive fuel
consumption, blackened points internally, black ish smoke from
the exhaust, backfiring.
Indicat ions o f too poor a mixture are: wh iteness of th e
plug interna ll y, porous plug points, poor engine perfo rm a nce,
o r abnormal overhea t ing of the engine.
Setting for idl ing speed
(see f ig. 12)
This operation s ho uld a lways be ca rried out on a warm engine.
Adjus t the horizonta l knur led sc rew
«
A» which is the slow
runn ing screw . Screwing it into its seat richens t he mixture
and viceversa . Ju s t bes ides screw
« A» there
is sc rew
«
B »
w hic h is th e thro tt le adjust ing sc rew. Adjust first screw
«
B »
so t h a t with th e thrott le fully c los d th e ngin e ca n sti ll ru n
at low revoluti o n s . Th e n scr w in
or
ou t screw A ti ll the best
mixture s tre ng th is obtain d. Flne ll y, ad just screw B to a
po int wh e re th r qulr d Idling is obtai ned.
Dismantling of carburettor
(see f ig . 13)
Afte r about 10.000 kms. (6000 m il es) it is advi sa bl e to
st ri p the carburettor and to check and c lea n a ll it s component
pa rt s .
Remove :
- Air in take pipe (1) loose nin g th e s trap f ixing nut
an d un sc rewin g it from the carburetto r block (1 8).
- Mi x in g c h amber cover (2) with air plunger . Unscrew
retaini ng r ing to free.
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