Maxum 4600 SCB - Engine Cooling System; Engine Room Ventilation System; Shaft Log Packless Sealing System

Chapter 2: Components/Systems 17
4600 SCB Owner’s Manual Supplement
Engine Cooling System
The engine cooling system circulates water
through a heat exhanger on the engine to reduce
engine temperature.
• Engine coolant (antifreeze) levels should be
checked at the engine-mounted expansion tanks
and at the coolant recovery bottles, located near
the engines.
• The engine cooling system’s raw water strainers (located in the engine room) should be checked for leaks and
cleaned every time you use your yacht. For instructions on how to clean the strainers, see the Raw Water Strainer
section of this supplement.
• Make sure both of the engine’s raw water intake valves (seacocks) are OPEN before starting the engines and
always keep them open whenever the engines are running.
Engine Room Ventilation System
•
The bilge blowers remove fumes from the
engine compartment and draws fresh air into
the compartment through the deck vents.
• To ensure fresh air circulation, always
operate the bilge blowers for at least four
minutes prior to starting the engine (or
generator); during starting, and while
operating your yacht below cruising
speed.
Shaft Log Packless Sealing System
The shaft seal, which is part of the shaft log packless sealing system, is a maintenance-free, watertight seal that
doesn’t require packing or adjustments.
CONNECTS TO
RAW WATER PUMP
INLET ON ENGINES
TYPICAL ENGINE COOLING SYSTEM ROUTING
RAW WATER
STRAINERS
RAW WATER
INTAKE VALVES (SEACOCKS)
CAUTION!
HOT HAZARD! NEVER check cool-
ant levels when the engine is hot or
while the engine is running.
!
SYSTEM DAMAGE HAZARD! The engine cooling system’s seacocks must be in the OPEN
position before engines are started and while the engines are operating.
CAUTION!
!
TO DECK
AFT
BILGE BLOWER ROUTING (TYPICAL PORT & STARBOARD)
VENTS
VENT HOSE (TYPICAL)
ENGINE
ROOM
EXPLOSION HAZARD!
• Operation of the blower system is not a guarantee that explosive fumes have been
removed. If you smell fuel, DO NOT start the engines. If the engines are already running,
IMMEDIATELY shut OFF the engines and all electrical accessories and investigate.
• DO NOT obstruct or modify the ventilation system.
WARNING!
!