TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Engine Cranks Over But Will Not Start Or Starts Hard
Important Information
1.
2.
3.
First, determine which engine system is causing the problem. To make an engine run,
basic components - fuel, spark (ignition), and compression - are required. If all three
components are present, the engine should run. If any one of the three are missing,
weak, or arriving at the wrong time the engine will not run.
Check ignition system operation. Remove coil wire from tower on distributor cap. Hold
coil wire near ground and check for spark while cranking engine over. Repeat procedure
with spark plug wires. If there is spark at the spark plug wires, remove the spark plugs
and make sure they are correct type and heat range, and not fouled or burned.
Run a compression check on engine to make sure the engine is mechanically OK.
Fuel System Rich
Cause
Special Information
Clogged flame arrestor
Excessive fuel pump pressure
Fuel pressure regulator defective
Fuel System Lean
Cause
Special Information
Empty fuel tank
Fuel shut-off valve closed (if equipped)
Vapor lock
Engine will not start after warm engine
shut down
Miscellaneous
Cause
Low grade or stale fuel
Water in fuel
Special Information
Page 1C-10
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...