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
Categories | Mercury MerCruiser Manuals |
---|---|
Tags | Mercury MerCruiser 1262 CID, Mercury MerCruiser 262 CID |
Model Year | 1998, 1999, 2000, 2001 |
Download File |
|
Document File Type | |
Copyright | Attribution Non-commercial |
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