Evinrude 4906B 4HP 1969 Owner's Manual page 141

4-50 FUEL
TYPE HI CARBURETOR ADJUSTMENTS
12-
Mount the engine in a test tank or
body of water. If this is not possible,
connect a flush attachment
to the lower unit.
engine above idle speed
attachment. If the engine
idle speed with no load on the propeller, the
engine could RUN-A-WAY
serious damage or destruction of the unit.
CAUTION: Water must circulate through
the lower unit to the engine any time the en-
gine is run to prevent damage to the water
pump in the lower unit. Just five seconds
without water will damage the water pump.
Start the engine and allow it to warm to
operating temperature.
speed idle by turning the low-speed needle
valve CLOCKWISE until the engine begins to
misfire or the rpm drops noticeably.
this point, rotate
COUNTERCLOCKWISE until the engine is
operating at the highest rpm.
coughs and operates
lean, but the idle and high-speed
ments have been correctly
check the synchronization
and ignition systems.
On engines with the flexible low-speed
extension to the front of the engine, the
spring maintains tension on the needle and
adjustment will not be lost because of vibra-
tion during operation.
packing nut arrangement,
and garden hose
NEVER operate the
using the flush
is operated above
resulting
Adjust the low-
From
the needle vavle
If the engine
as if the fuel is too
adjust-
made, then re-
between the fuel
On engines with the
the nut must be
in
Idle adjustment
horsepower engines.
Flexible cable arrangement
engine.
on
linkage Johnson/Evinrude
on the 9.5 horsepower
9.5