FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Lack of Power, Sluggish or Spongy Symptom (Continued)
1.
Check for excessive resistance on
the bottom of the boat such as dirt,
barnacles, etc.
2.
3.
Check for proper propeller size and
pitch for that application.
If a problem is found, repair as
necessary.
18
Go to OBD
System
Check
Was a problem found?
-
Go to Step 19
1.
Review all diagnostic procedures
within this table.
2.
When all procedures have been
completed and no malfunctions are
found, review/inspect the following:
Visual/physical inspection.
Scan tool data.
All connections within a suspected
circuit and/or system.
•
•
•
19
Contact
MerCruiser
Customer
Service
3.
If a problem is found, repair as nec-
essary.
Go to OBD
System
Check
-
Was a problem found?
Detonation/Spark Knock Symptom
Step
Action
Value(s)
Yes
No
Definition: A mild to severe ping, usually worse under acceleration. The engine makes
sharp metallic knocks that change with throttle opening.
Was the “On-Board Diagnostic” (OBD)
System Check performed?
Go to OBD
1
-
-
Go to Step 2 System Check
Was visual/physical check performed?
Go to Visual/
Physical
Check
2
Go to Step 3
1.
Check base timing.
•
Refer to Ignition Timing Set Proce-
dure in the Distributor Ignition sec-
tion.
3
4
2.
If a problem is found, repair as
necessary.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 4
Go to Step 5
1.
Check for proper operation of
Ignition Control (IC) circuit and the
Knock Sensor (KS) circuit.
If a problem is found, repair as
necessary.
2.
Go to OBD
System
Check
Was a problem found?
Index
Page 5D-16
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...