SERVICE MANUAL NUMBER 30
FUEL DELIVERY SYSTEM FOR ELECTRONIC FUEL INJECTION
Fuel Delivery System
Recommendations
WARNING
Boating standards (NMMA, ABYC) and Coast Guard regulations must be adhered
to when installing fuel delivery system.
The Fuel Tank is an integrated component of the boat. Refer to the special information on
service and maintenance, which you have received from the tank or boat manufacturer.
All fuel lines must be well secured. The holes where the lines run through the bulkheads
should be carefully rounded off or protected with rubber grommets. This prevents damage
to the lines from abrasion.
The following, but not limited to the following, additional fuel connection related points,
applying to all engines unless otherwise stated, must be considered. Refer to boating
standards (NMMA, ABYC) and Coast Guard regulations for complete guidelines.
1.
Fuel pickup should be at least 1 in. (25 mm) from the bottom of fuel tank to prevent pick-
ing up impurities.
2.
3.
Fuel lines used must be Coast Guard approved (USCG Type A1).
Diameter of fittings and lines must be smaller than 3/8 in. (10 mm) ID.
IMPORTANT: Vacuum reading higher than specified can cause vapor locking with
some of today’s fuels. It can also cause poor engine performance due to fuel starva-
tion.
4.
The maximum measured vacuum at the engine’s fuel inlet must not exceed 2 in. Hg
(6.9 kPa) at 650, 3000, wide open throttle (wot) and at idle rpm.
5.
On Multi-Engine Gasoline Installations: It is best to use a fuel pickup and supply line
for each engine. If a single pickup and line is used, line must not be smaller than 1/2 in.
(13mm)
I.D.
6.
7.
Larger diameter (than previously specified) lines and fittings must be used on installa-
tions requiring long lines or numerous fittings.
Fuel lines should be installed free of stress and firmly secured to prevent vibration and/
or chafing.
8.
9.
Sharp bends in fuel lines should be avoided.
A flexible fuel line must be used to connect fuel supply line to fuel inlet fitting on engine
to absorb deflection when engine is running.
INDEX
90-863161
SEPTEMBER 2000
Page 5A–5
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 496 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30 4.0 out of 4.0 based on 2 product reviews. How many openings for crankcaseventilation is there on
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Great down load . it was all there an more