INTRODUCTION
1
2
Section 06 FUEL SYSTEM
Subsection 03 (CARBURETORS)
31
Diaphragm
XP Model Only
CARBURETOR REMOVAL
Inspect parts for corrosion dammage (shaft, butterfly,
spring screw, check valve housing, etc.).
PUMP DIAPHRAGM LEAK TEST
TYPICAL
To remove carburetors from engine, proceed as fol-
lows:
Remove air vent tube support.
Unlock retaining slides holding air intake silencer base.
Remove air intake silencer base from watercraft.
Remove screws holding flame arrester base support
to cylinder head cover.
Unscrew base retaining screws then remove base from
carburetors and move to front of watercraft.
Turn the valve to OFF position.
NOTE:
For fuel line removal, use pliers (P/N 295
000 054).
Disconnect pulse line from fuel pump.
Disconnect fuel fuel supply line from fuel pump.
Disconnect fuel return line.
Disconnect oil injection pump cable, throttle cable and
choke cable.
Remove screws
no. 6
and lock washers
no. 7
retaining
carburetors.
All Others Models
Remove 4 bolts
no. 8
and lock washers
no. 12
from
rotary valve cover then move carburetors and rotary
valve cover on top of engine.
NOTE:
When removing rotary valve cover , pay
attention that the rotary valve stay in place, other-wise
it must be timed.
Remove carburetors from intake manifold.
Disconnect fuel bypass line between carburetors (twin
carburetors).
Remove carburetor(s) from rotary valve cover.
DISASSEMBLY AND INSPECTION
Using a suitable pump gauge tester, perform the fol-
lowing test proceeding as follows:
- Install pump gauge tester (P/N 295 000 083) on pulse
nipple.
- Pump tester until it reaches 28 kPa (4 PSI).
Diaphragm must stand pressure for 10 seconds. If
pressure drops, replace diaphragm.
F01F0XB
A
2
1
1
2
TYPICAL PAGE
Sub-title with part
name(s) from
exploded view.
TYPICAL mention
indicates a general
view which does not
represent full detail.
Sub-sub-title in this
case indicates that
particular procedure
for XP is finished, so
from this point, all
others models are
concerned.
Title in italic indicates a
particular procedure
concerning a model.
Service tool to be
used to perform a
certain procedure.
Title indicates main
procedure to be
carried-out.
Sub-sub-title in
capital indicates a
particular testing,
adjustment or
repair procedure.
Illustration
always follows
text it is
pertained to.
Numbered step are
used to give a
sequence to be
perfomed.
Numbers are used
for description of
components.
Letters are used for
any measures.
Bold numbers in the
text refer to the parts
shown in the exploded
view at the beginning
of the subsection.
F01A0BT
smr2005-002
VII
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Содержание Rotax 1503 4-Tec 2005
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