Stopping The Engines; Break-In Procedure - Yamaha AR240 HO Owner's Manual

On this boat, the engines are connected
directly to the drive unit. Starting either
engine generates some thrust imme-
diately. Only enough throttle should be
applied to keep the engine at a fast
enough idle to stay running.
NOTiCE:
do not operate the boat with just
one engine running. Severe engine
damage could result because water
can flood the non-operating engine
through the cooling water intake. if
single-engine operation is unavoid-
Gasoline vapors can explode.
Operate blower for at least 4 minutes and
Check engine compartment bilge for
able, operate the boat at a "no wake"
gasoline vapors before starting engines.
Do not start engines if there is a fuel leak
or loose electrical connection.
speed only.

STOppiNG THE ENGiNES

To stop the engine, return the throttle
levers to the idle position, then turn the
main switches to "Off." The engines can
also be stopped by pulling the engine
stop switch lanyard. WARNiNG! Once
the engines have stopped, you have
NO STEERiNG CONTROL over the
boat. You could collide with another
boat, a dock, or other obstacle.
WARNING
Remove the ignition keys and the
engine stop switch lanyard if the boat
will be left unattended.
Stopping the engines immediately after
operating at high rpm is not recom-
mended. Let the engines cool off at idle
or low speed for a few minutes first.

BREAK-iN pROCEdURE

The engine break-in period is essential
to allow the various components of the
engine to wear and polish themselves
to the correct operating clearances.
This ensures proper performance and
promotes longer component life.
1) Launch the boat and start the
engines (see page 3-15).
2) For the first 5 minutes, run the
engine at trolling speed. For the
30 minutes of operation after that,
keep the engine speed below 5,000
rpm. For the hour of operation after
that, keep the engine speed below
8,000 rpm.
3) Proceed with normal operation.
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peratIon
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