Evinrude 4906B 4HP 1969 Owner's Manual page 103

4-12 FUEL
the needle valve and seat.
when making any adjustments
fuel consumption, such as the float level or
automatic choke.
ENGINE SURGE
If the engine operates
the boat is being constantly
decreased, even though an attempt
made to hold a constant
problem can most likely be attributed
fuel pump.
Operational description
cedures for the fuel
Section 4-9.
4-5 JOHNSON/EVINRUDE
This section provides
procedures for removal,
ing and inspecting,
bench adjustments,
ing adjustments for the three
retors installed on engines
manual. The Type I carburetor
on the 1-1/2 to 28 hp engines; the Type II on
the 30 to 40 hp models;
carburetor is used on the 9-1/2 hp model.
The carburetors are
the type of choke system
manual choke; the second, a heat and elec-
tric combination choke; and the third has a
water choke. The following
types of carburetors,
model engines equipped with each.
CARBURETOR
Type I
Single barrel, front draft,
with adjustable
and high-speed
1.5 hp
1968-70
3.0 hp 1956-62
5.0 hp 1965-68
5.5 hp 1959-63
Type I
Single barrel, front draft,
with adjustable
and high-speed
and filter bowl attached
5.5 hp 1956-58
7.5 hp 1956-58
Use extra
affecting
as if the load on
increased
is being
engine speed, the
to the
and service
pump are given
CARBURETORS
complete detailed
disassembly, clean-
assembling including
installation, and operat-
OMC carbu-
covered in this
is installed
and the Type
further identified
used. One has a
table lists the
the horsepower
INSTALLATIONS
low-speed
needle valves.
5.5 hp
1959-63
10 hp 1962-63
1957-63
18 hp
28 hp 1962-64
low-speed
needle valve,
to carburetor.
10 hp 1956-61
1956
15 hp
care
the
Single barrel, front draft,
with adjustable
High-speed
and
3.0 hp
5.5 hp
6.0 ho
pro-
in
Single barrel, front draft,
with adjustable
needle valve with special packing.
High-speed
18 hp
20 hp
Single barrel, front draft,
with adjustable
III
and high-speed
by
30 hp
33 hp
and
Single barrel, front draft,
with adjustable
High-speed
Single barrel, down draft,
with adjustable
High-speed
See Section 4-6 for service details for
each choke systems.
For synchronizing
ignition system,
Type I
low-speed
needle valve.
is fixed orifice
in float bowl.
1963-68 18 hp
1964 20 hp
1965-70
Type I
low-speed
is fixed or ifice
in float bowl.
1969-70 25 he
1969-70
Type II
low-speed
needle valves.
1956
35 hp
1965-70 40 hp
Type II
low-speed
ve,
needle val
is fixed or ifice
in floa t bow 1.
40 hp 1964-1970
Type 01
low-speed
needle valve.
is fixed orifice
in float bowl.
9.5 hp 1964-70
adjustments
see Chapter 5.
1964-68
1966-68
1969-70
1957-59
1960
with the