Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30

SERVICE MANUAL NUMBER 30
MAINTENANCE
Specifications
MCM (Sterndrive) Models
Model
496 MAG
496 MAG HO
Propshaft Horsepower
3751
4251
317
Propshaft Kilowatts
280
Number of Cylinders
Displacement
8
496 cid (8.1 l)
Bore/Stroke in. (mm)
Compression Ratio
4.25 / 4.38 (108 / 111)
9.1:1
Compression Pressure
Idle rpm (in Neutral Gear)
Max. rpm (at WOT)
Minimum 100 psi (690 kPa)3
6502
4400-48002
4600-50002
Oil Pressure (at 2000 rpm)
Oil Pressure (at Idle)
Electrical System
60 psi (414 kPa)
30 psi (207 kPa)
12 V Negative (–) Ground
6 psi (41 kPa)
Fuel Pressure (Running)
Alternator Rating - Hot Operating Amps
Alternator Rating - Cold Operating Amps
Min. Battery Requirements
Firing Order
65 Amps
72 Amps
650 cca / 825 mca / 150Ah
1-8 7-2 6 5 4 3
Spark Plug Type
Denso TJ14R-P15
0.060  in.(1.52 mm)
160° F (71° C)
Spark Plug Gap
Thermostat
1
2
3
Power rated in accordance with NMMA (National Marine Manufacturer’s Association) rating procedures.
Measured using a accurate service tachometer with engine at normal operating temperature.
Minimum recorded compression in any one cylinder should not be less than 70 percent of the highest recorded
cylinder.
INDEX
90-863161
SEPTEMBER 2000
Page 1B-7
Product Specification
CategoriesMercury MerCruiser Manuals
Tags
Model Year1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30 SKU UPC Model
Sven-Erik Walin on Jun 10, 2018. crankcase ventilation

How many openings for crankcaseventilation is there on
Merc 496 HO ?


John fox on Apr 11, 2018. Manual

Great down load . it was all there an more


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