MJM Yachts 36z Express - Manual (Page 43)

8.1
8.2
8.3
RAW WATER COOLING SYSTEM
GENERAL
Raw water (seawater) is used to cool the engine and the generator. It is also used in
air-conditioning options.
ENGINE RAW WATER
The Yanmar D3 engines have integral raw water intakes without seacocks, but with strainers
on the forward starboard top of the engines.
The generator (if fitted) has a raw water intake seacocks and strainers. Before using the make
sure its seacock is in the INTAKE position.
In either case, it’s good practice to visually inspect the strainers daily to insure that they are not
fouled. Using an engine with restricted raw water flow can cause over-heating and damage to the
engine. When you start an engine, it is advisable to check the exhaust as it exits the boat to make
sure water is being mixed into the exhaust gas. You should see a surge of water every few
seconds. (It may take more than a few seconds for the first surge.)
ADDITIONAL RAW WATER USERS
In addition to the engines and generator, the air-conditioning system will use raw water and have
a seacock(s) and a strainer that needs to be open and clear for the proper operation of
equipment.
CHAPTER 8 36