HARD START
Definition: Engine cranks OK, but does not start for a long time. Engine does eventually run, or
may start but immediately dies.
PRELIMINARY CHECKS
Make sure proper starting procedure is being used. See Owner’s Manual.
Perform the careful visual/physical checks as described at the start of “Troubleshooting Charts”
section.
CHECK FUEL SYSTEM FOR:
1.
Proper operation of fuel pump relay. Relay will operate fuel pump for 2 seconds when ignition is
turned “ON.” Also look for open in CKT 465, fuel pump relay driver.
2.
3.
4.
5.
6.
Clogged or dirty water separating fuel filter.
Contaminated fuel or winter grade fuel during warm weather.
Vapor lock condition or engine flooding. Check fuel pressure.
VST fault-stuck float, leaking vapor regulator.
Electric fuel pump check valve or fuel pressure regulator and / or fuel damper leaking.
CHECK IGNITION SYSTEM FOR:
1.
2.
Proper ignition timing.
Ignition wires for cracking, hardness and proper connections at both distributor cap and spark
plugs.
3.
Wet plugs, cracks, wear, improper gap, burned electrodes, or heavy deposits. Repair or replace
as necessary.
4.
5.
Distributor cap inside and out for moisture, dust, cracks, burns, and arcing to coil mounting screws.
Worn distributor shaft. Bare and shorted wires. Pick-up coil resistance and connections. Try to turn
distributor shaft by hand. Drive pin may be broken.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-117
| 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.
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