MJM Yachts 29z Outboard - Manual (Page 30)

CHAPTER 8 RAW WATER SYSTEM
- 30 - 29z
8.1 GENERAL
Raw water (seawater) is used to cool the engine and the generator. It is also used in the saltwater
washdown and air-conditioning options. Other than the engine, where the water enters through
the stern drive, raw water enters the boat through a seacock, which is a valved thru-hull
penetration.
8.2
RAW WATER FILTERS
The generator (if fitted) uses a separate seacocks and strainers. Before using the generator,
make sure its seacock is in the INTAKE position. While you are checking this, visually inspect the
strainer to insure that it is not fouled. Using any engine with restricted raw water flow can cause
over-heating and damage to the engine. When you start any 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.)
8.3
ADDITIONAL RAW WATER USERS
In addition to the engine and genset, other options may use raw water supplies. These include
the air-conditioning, and saltwater washdowns. Each of these will have a seacock and a strainer
that need to be open and clear for the proper operation of equipment.