103666_EBH_Rev1.0_080215
MPE 750 Turbo Marine
Closed Loop
Installation Guide
Page 14
4.3 Boat
tow
In combination with a jet propulsion system there is a risk to
fi
ll the engine with water by towing the boat.
The engine has a wet exhaust system. This means sea water is injected into the exhaust out of the open loop
cooling circuit. Due to this water injection the exhaust temperature and also noise is reduced. This water is
pressed out of the exhaust system by the exhaust pressure / stream of the engine. If the engine does not run
there is no mechanism to drain the exhaust system.
By towing the boat the jet pump system delivers sea water to the engine even without running engine. This
means water will be injected into the exhaust system. When the exhaust system is fully
fi
lled with water it will
fi
ll the engine with water.
Don’t tow the boat with a high speed. If a high
tow speed is necessary the water feed tube
between jet pump and engine has to be closed
by a clamping device or a closure valve has to
be installed.
ATTENTION
