Mercury-MerCruiser GM V6 262 CID 4.3L Marine Engines Service Manual Number 25 Sections 1-3

262
CID (4.3L) ENGINES
SERVICE MANUAL NUMBER 25
OTHER CAUSES OF DETONATION
IMPORTANT: Use of improper fuels will cause engine damage and poor performance.
1.
2.
Over-advanced ignition timing.
Lean fuel mixture at or near full throttle (could be caused by carburetor or leaking intake
manifold).
3.
4.
Cross-firing spark plugs.
Excess accumulation  of  deposits on  piston and/or  combustion chamber  (results in
higher compression ratio).
5.
Inadequate cooling of engine by deterioration of cooling system.
72425
Detonation Damage
a
b
c
d
72315
Combustion Description
a  - Spark Occurs
b  - Combustion Begins
c  - Combustion Continues
d  - Detonation Occurs
Index
Page 3A-18
90-861328--1 NOVEMBER 1999
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1998, 1999, 2000, 2001
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CopyrightAttribution Non-commercial
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Mercury-MerCruiser GM V6 262 CID 4.3L Marine Engines Service Manual Number 25 Sections 1-3 SKU UPC Model
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