Evinrude 4906B 4HP 1969 Owner's Manual page 102

Carburetor installed
engines.
EXCESSIVE FUEL
Excessive fuel consumption
from one of three conditions, or a combina-
tion of all three.
1- Inefficient
engine operation.
2- Damaged condition
cluding excessive marine growth.
3- Poor boating habits of the operator.
If the fuel consumption suddenly increas-
es over what could be considered
then the cause can probably be attr ibuted to
the engine or boat and not the operator.
Marine growth on the hull can have a
very marked effect
This is why sail boats always try to have a
haul-out as close to race time as possible.
Marine growth allowed
unit will create "drag" and seriously
formance, and corrode the metal
on most 35 hp and
CONSUMPTION
can result
of the hull, in-
normal,
on boat performance.
to accumulate on the lower
hamper boat per-
if it is not removed.
A clean
ownership", and good care.
While you are checking
note of the propeller
blade or other damage will definitely
poor boat performance.
40 hp
If the hull and propeller
shape, then check the fuel system for possi-
ble leaks.
pump and the carburetor
running and the line between the fuel tank
and the pump when the engine is not run-
ning. A leak between the tank and the pump
many times will not appear when the engine
is operating,
the pump drawing fuel will not allow the
fuel to leak.
and the suction no longer exists, fuel may
begin to leak.
If a minor tune-up has been performed
and the spark plugs, points, and synchroniza-
tion are properly adjusted, then the problem
most likely is in the carburetor,
an overhaul is in order.
corroded
A
of
placem ent
the cost of a
TROUBLESHOOTING
engine reflecting the owners
the bottom
condition.
Check the line between the fuel
while the engine is
because the suction created by
Once the engine is turned off
Check for leaks at
on a
hub small engine propeller.
propeller be
this will less expensive than
rebuild.
4-11
of
"pride
take
A bent
cause
are in good
indicating
Re-