Setting Trim Angle While Running Engine At Idle Speed; Operating In Shallow Water; Optimax Engine Break-In Procedure; Starting The Engine - Mercury 135 Optimax Manual

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SETTING TRIM ANGLE WHILE RUNNING ENGINE AT
IDLE SPEED
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Submerging the exhaust relief hole (a) on the outboard can happen on some
boats if you trim the outboard "full-in" while running the engine at idle speed.
This will cause an exhaust restriction, resulting in rough idle, excessive smoke,
and fouled spark plugs. If this condition exists, trim outboard up until exhaust
relief hole is out of the water (b). However, the outboard will have to be lowered
for accelerating from a standing start or from idle speed.
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OPERATING IN SHALLOW WATER

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When operating your boat in shallow water, you can tilt the outboard beyond
the maximum trim range to prevent hitting bottom.
a. Reduce engine speed below 2000 RPM.
b. Tilt outboard up. Make sure all the cooling water intake holes stay
submerged at all times.
c. Operate the engine at slow speed only. If engine speed exceeds 2000
RPM, the outboard will automatically return down to the maximum trim
range.
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OPTIMAX ENGINE BREAK-IN PROCEDURE

Note: Do not use pre-mixed gas and oil in this engine. Use straight gasoline during
engine break-in and after engine break-in.
The engine break-in procedure for Your Optimax outboard is important to ensure
proper performance and maximum life from the engine. The following break-in
procedure allows the internal engine parts to wear-in evenly. Incorrect engine
break-in can shorten the engine life.
The engine automaticity receives extra oil during the first hours of operation. For
most boaters this extra oil mode will be complete in about ten hours.
First hour
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Allow engine to warm-up for 30-60 seconds.
•
Avoid continuous operation at idle speed for more then ten minutes.
•
Run the engine the majority of time between 3000 and 4500 RPM
approximately three quarter throttle.
•
Vary engine speed; change engine speed approximately every 2 minutes.
•
Avoid trimming the outboard out (up) beyond a vertical trim position during
operation.
•
Short bursts of full throttle for periods up to 10 seconds are acceptable.
Next three hours
•
Change engine speed every 10 minutes.
* Note: It is the driver's responsibility to always drive in a safe manner. Improper
trim angle of the outboard when driving at speed can be difficult and dangerous.
The purpose of specifying trim angle is to help guide the operator in determining
how to put the proper load on the engine. They are intended to be guidelines and
do not suggest or require unsafe boat operation.
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STARTING THE ENGINE

Before starting, read the Pre-Starting Check List, Special Operating Instructions,
and Engine Break-in Procedure on the first three pages in the Operation Section.
Never start or run your outboard (even momentarily) without water circu-
lating through all the cooling water intake holes in the gear case to pre-
vent damage to the water pump (running dry) or overheating of the en-
gine.
1
Lower the outboard to the run position. Make sure all the cooling water intake
holes are submerged.
2
Open fuel tank vent screw (in filler cap) on manual venting type fuel tanks.
3
Squeeze the fuel line primer bulb several times until it feels firm.
4
Set the lanyard stop switch to RUN position. Read the Lanyard Stop Switch
safety explanation and Warning in the General Information Section.
5
Shift outboard to neutral (N) position.
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STARTING THE ENGINE (CONTINUED)
Note: For initial start of a new engine or for an engine that ran out of fuel, or was
drained of fuel, the fuel system should to be filled as follows.
•
Squeeze the fuel line primer bulb until it feels firm
•
Turn the ignition key switch to the ON position for three seconds. This operates
the electric fuel pump.
•
Turn the ignition key switch back to the OFF position, and squeeze the primer
bulb again until it feels firm. Turn the ignition key switch to the "ON" position
again for three seconds. Continue this procedure until the fuel line primer bulb
stays firm.
6
Do not advance the neutral fast idle speed feature on the remote control for
starting.
7
Turn the ignition key to START position. Release the key when engine starts.
If engine fails to start in ten seconds, return the key to the OFF position, wait
one second and try again.
Note: The electronic starting system will automatically prime (choke) the engine
and increase idle speed for starting.
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Check for a steady stream of water flowing out of the water pump indicator
hole.
IMPORTANT: If no water is coming out of the water pump indicator hole,
stop engine and check cooling water intake holes for obstruction. No
obstruction may indicate a water pump failure or blockage in the cooling
system. These conditions will cause the engine to overheat. Have the
outboard checked by your dealer. Operating the engine while overheated
will cause engine damage.
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CAUTION
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