FUEL
SYSTEM
Page
L40
DELLORTO CARBURETTERS
Fuel Leakage
1.
Float needle valve dirty, worn, or valve seat loose in
its
thread. Thorou
g
hly
clean fuel filter. and valve, and fully tighten valve seat.
2.
Flwt not free, or heavy: Fit new float assembly.
3.
Fuel feed pipes loose, or broken. Tighter\ pipe unions, or replace pipes.
4.
Gaskets hardened, perished or loose: Fit new gaskets.
5.
Fuel pump deliverin
g
under excessive pressure: Fuel pump to be checked and
calibrated.
Cold Starting Difficulties
1.
Abnormal level of fuel in float chamber: Check
flwt
level.
2.
Starting device actuating cable tight, broken or unattached: Replace cable.
S.
starter ler airry: Ciean,
ur
rvp;o~s
jr;.
Irregular Firing of Engine
1.
incorrect adjustment of mixture screws: See DELLOKTO CARBURETTERS,
ADJUSTING.
e
L
.
jet
dirt.*
I
IC)OCP.
--
rlmnn
-'--'
Qn(l
tighten
!et.
3.
Progression holes, or idling circuit ducts blocked: Thorough1 y clean all
orifices and ducts.
4.
Air leak from mounting flange.
Check mountings are correctly tightened.
Replace
'0'
rings
if
necessary.
5.
Throttle spindle leakin
g
air through
its
bearings: Re
p
lace s
p
indle and
bearings.
6.
Throttle valves, or their control stocking: Free throttle valves and spindle.
Vehicle Lacking Power
1.
Main jet, pump jet or emulsion tube, blocked or loose: Check, clean or
replace defective
park.
2.
Throttle valve not fully opening: Check throttle valve and linkage.
3.
Air cleaner clocked: Clean, or re
p
lace filter.
ESPRIT
I=-,
to
no
np
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