Mercury 250 Jet, Руководство по установке

Страница: 4 / 46

250 HP JET DRIVE INSTALLATION MANUAL
Page 4 90-10240040 DECEMBER 2003
Cable Length Cable Gauge
Up to 1.1 m (3-1/2 ft) 4 (25mm
2
)
1.1-1.8 m (3-1/2 - 6 ft) 2 (35mm
2
)
1.8-2.3 m (6 - 7-1/2 ft) 1 (50mm
2
)
2.3-2.9 m (7-1/2 - 9-1/2 ft) 0 (50mm
2
)
2.9-3.7 m (9-1/2 - 12 ft) 00 (70mm
2
)
3.7- 4.6 m (12 - 15 ft) 000 (95mm
2
)
4.6 - 5.8 m (15 - 19 ft) 0000 (120mm
2
)
Boat Construction
IMPORTANT: All applicable U.S. Coast Guard regulations for INBOARD engines must
be complied with, when constructing engine compartment.
Care must be exercised in the design and construction of the engine compartment. Seams
must be located so that any rain water or splash, which may leak through the seams, is
directed away from the engine and its air intake. Also, the passenger compartment drainage
system should not be routed directly to the engine compartment. Water that runs on or is
splashed in the air intake may enter the engine and cause serious damage to internal
engine parts.
IMPORTANT: Mercury Marine will not honor any warranty claim for engine damage
as a result of water entry.
Engine Compartment Ventilation
Engine compartment must be designed to provide a sufficient volume of air for engine
breathing and also must vent off any fumes in engine compartment in accordance with
industry standards (ABYC, NMMA, etc.), federal standards and U.S. Coast Guard
regulations for inboard engines. Pressure differential (outside engine compartment versus
inside engine compartment) should not exceed 51 mm (2 in.) of water (measured with a
manometer) at maximum air flow rate.
For serviceability, it is recommended that an additional 152 mm (6 in.) minimum (per side)
of clearance be allowed between powerhead and engine compartment walls.
Exhaust System
IMPORTANT: It is the responsibility of the boat manufacturer, or installing dealer, to
properly locate the engine. Improper installation may allow water to enter the
expansion chamber and combustion chambers and severely damage the engine.
Damage caused by water in the engine will not be covered by Mercury Marine Limited
Warranty, unless this damage is the result of defective parts.
The engine must be properly located to ensure that water will not enter the engine through
the exhaust system. Determine the correct engine height by taking measurements (a) and
(b), with boat at rest in the water and maximum load aboard. Subtract (b) from (a) to find
(c). If (c) is less than specified in chart, boat construction must be altered to properly lower
waterline relative to exhaust chamber.