Ignition System Check(1 of 2)
1
•
•
DISCONNECT TACH BEFORE PROCEEDING WITH THE TEST.
CHECK SPARK AT PLUG WIRE USING AN INDUCTIVE PICKUP TIMING LIGHT
WHILE CRANKING. A FLASHING LIGHT INDICATES SPARK. (IF NO SPARK ON FIRST
WIRE, CHECK SECOND WIRE.) A FEW SPARKS AND THEN NOTHING
IS CONSIDERED NO SPARK.
NO SPARK
SPARK
•
DISCONNECT 4 TERMINAL CONNECTOR
ON DISTRIBUTOR AND CHECK FOR
SPARK.
1A
CHECK FUEL, SPARK PLUGS, ETC.
SEE “TROUBLESHOOTING.”
NO SPARK
SPARK
2
3
• CHECK FOR SPARK AT COIL WIRE WITH TIMING
LIGHT WHILE CRANKING. (LEAVE TIMING LIGHT
CONNECTED TO COIL WIRE FOR STEPS 3-6).
REPLACE MAGNETIC
SHAFT ASSEMBLY.
NO SPARK
SPARK
DISCONNECT DISTRIBUTOR 2 WIRE TERMINAL
INSPECT CAP FOR WATER,
CRACKS, ETC. IF OK,
REPLACE ROTOR.
•
•
“C/+” PNK/BRN CONNECTOR.
IGNITION SWITCH “ON,” ENGINE STOPPED.
CHECK VOLTAGE AT “+ BRN” AND “C PNK” TERMI
NALS OF DISTRIBUTOR HARNESS CONNECTION.
UNDER 10 VOLTS “C
PNK”TERMINAL ONLY
BOTH TERMINALS 10
VOLTS OR MORE
BOTH TERMINALS
UNDER 10 VOLTS
4
REPAIR WIRE FROM MOD-
ULE “+” TERMINAL TO “B”
TERMINAL OF BLACK IGNI-
TION COIL CONNECTOR
OR PRIMARY CKT. TO IGNI-
TION SWITCH.
CHECK FOR OPEN OR
•
•
RECONNECT DISTRIBUTOR 2
TERMINAL CONNECTOR.
WITH IGNITION “ON,” CHECK VOLT-
AGE FROM TACH. TERMINAL TO
GROUND
GROUND IN CKT. FROM “C”
TERMINAL TO IGNITION COIL.
IF CKT IS OK, FAULT IS IGNI-
TION COIL OR CONNECTION.
1
TO 10 VOLTS
OVER 10 VOLTS
UNDER 1 VOLT
REPLACE MODULE AND
CHECK FOR SPARK FROM
COIL AS IN STEP 6.
•
•
CONNECT TEST LIGHT FROM TACH.
TERMINAL TO GROUND.
CRANK ENGINE AND OBSERVE
LIGHT.
REPAIR OPEN TACH.
LEAD OR CONNEC-
TION AND REPEAT
TEST #4.
SPARK
NO
SPARK
REPLACE
IGNITION
COIL.
SYSTEM
OK
CHART CONTINUED
ON PAGE 77
a
b
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-75
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you