Specifications

14 CHAPTER 2: FEATURES / SYSTEMS
3488 Motoryacht • Owner’s Manual Supplement
Engines
The owner’s packet contains detailed engine operation and maintenance manuals. Read and understand these manu-
als before using or working on the engines.
Engine Cooling System
The engine cooling system circulates raw water around com-
ponents and also uses a freshwater heat exchanger on the
engine to reduce engine temperature.
• Make sure both engine seawater intake valves (seacocks)
are open before starting the engines and keep the seacocks
open while the engines are running.
• The cooling system’s seawater strainers should be checked
for leaks and debris every time you use your yacht. For
instructions on how to clean the seawater strainers, see the
Seawater System section of this Supplement.
Exhaust System
The exhaust system is designed to keep water out of the engines in most sea conditions, however, do not anchor the
stern to sea or shut the engines off if high seas might flood the exhaust system. Always consider the sea conditions
before anchoring or shutting off the engines.
CONNECT TO
RAW WATER PUMP
INLET ON ENGINES
ENGINE COOLING SYSTEM ROUTING (TYPICAL)
SEAWATER
STRAINERS
SEACOCK GASKET
SEACOCK (TYPICAL)
SEACOCK
LEVER
ENLARGED VIEW OF ENGINE SEAWATER INTAKE VALVE
INTAKE
STRAINER
CAUTION!
SYSTEM DAMAGE HAZARD! The engine cooling
system’s seacocks must be opened before engines are
started and during engine operation.
!
DANGER!
!
CARBON MONOXIDE POISONING HAZARD!
Leaking engine and/or generator exhaust is a source of dangerous carbon monoxide
gas (CO). Check all exhaust systems before each trip.
• Look for leaks in exhaust systems of both generator and propulsion engine(s).
• Look for discoloration, water leaks, carbon or stains around joints.
• Make sure all exhaust clamps are in place and secured.
• Make sure ventilation systems work and are not obstructed or restricted.
• Make sure gaps around engine room plumbing, cableways, exhaust system, doors, hatches,
and access panels are minimized to reduce the chance of CO entering the living space(s).
EXHAUST SYSTEM LAYOUTS
DIESEL ENGINE EXHAUST SYSTEM
MUFFLERS
EXHAUST THRU-HULLS
(TYPICAL PORT & STBD)
EXHAUST HOSES (TYPICAL)
GAS ENGINE EXHAUST SYSTEM