MJM Yachts 40z Express - Manual (Page 14)

3.0
PROPULSION SYSTEM
PROPULSION SYSTEM
3.1 GENERAL Your 40z is propelled by twin Volvo diesel 370 HP D6 engines with 24
overhead valves, turning (via IPS transmission) forward facing duo-prop propellers. The
dual-lever electronic control acts as a combination throttle and gear selector. Care should be
taken when shifting. Always allow the transmission to engage the new gear before throttling
up. If the two levers are set to within 200 RPM of one another, they will automatically synchronize.
The engine should never be running when swimmers are near the boat.
Unscrew Cap when
engine cold to check
COOLANT LEVEL
OIL LEVEL DIPSTICK
See Page 65 of Volvo IPS Operator’s Manual
for greater detail of engine components
NEW ENGINE BREAK-IN While running the engine for the first time and after
shut-down, check for proper engine oil pressure, diesel fuel leaks, engine oil leaks, coolant leaks,
proper operation of the indicators and gauges, proper exhaust color, engine vibrations and
sounds, If temperature is high (a) Is the raw water intake seacock open at the base of the IPS
drives? (b) Are the raw water strainers clogged?
The engine may seize if it is operated when seawater intake is restricted or
if load is applied without allowing the water temperature (engine) to warm up.
During the first 10 hours of operation, full load should only be applied for short periods. Never run
the engine for a long period at a constant RPM during this period. Higher oil consumption is
typical at this time, so carefully observe oil pressure and engine temperature, exhaust color and
check engine oil and coolant levels frequently... i.e. daily.
CHAPTER 3
FUEL FILTER
w/bleeding pump
& nipple
RAW WATER
INTAKE STRAINERS