SERVICE MANUAL NUMBER 23
FUEL INJECTION SYSTEM TROUBLESHOOTING
Page 5D-13
90-861326--1 MARCH 1999
Surges and/or Chuggles Symptom (Continued)
15
1. Visually/physically check vacuum
hoses for splits, kinks and proper
connections and routing.
2. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 16
16
1. Check or proper alternator voltage
output.
2. The voltage should be between
specified values.
3. If a problem is found, repair as
necessary.
Was a problem found?
11-16
Volts
Go to OBD
System
Check
Go to Step 17
17
1. Review all diagnostic procedures
within this table.
2. If all procedures have been
completed and no malfunctions
have been found, review/inspect the
following:
•
Visual/physical inspection.
•
Scan tool data.
•
All electrical connections within a
suspected circuit and/or system.
3. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Contact
MerCruiser
Customer
Service
Lack of Power, Sluggish or Spongy Symptom
Step
Action
Value(s)
Yes
No
Definition: Engine delivers less than expected power. Little or no increase in speed when
throttle lever is advanced part way.
1
Was the “On-Board Diagnostic” (OBD)
System Check performed?
-
Go to Step 2
Go to OBD
System Check
2
Compare engine performance with a
similar engine. Both should be close.
Is engine performance close to similar
engine.
-
No problem
found
Go to Step 3
3
Was visual/physical check performed?
-
Go to Step 4
Go to Visual/
Physical
Check
4
1. Remove and check flame arrestor
for dirt, or for being restricted.
2. Replace flame arrestor if necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 5
5
1. Check for contaminated fuel.
2. Check water separating fuel filter.
3. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 6
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