TROUBLESHOOTING
SERVICE MANUAL NUMBER 24
Engine Cranks Over But Will Not Start Or Starts Hard
NOTE: This troubleshooting chart applies to carbureted engines only. For EFI engines, refer
to SECTION 5F-“Fuel Injection System Troubleshooting.”
Important Information
1.
First, determine which engine system is causing the problem. To make an engine
operate, basic components - fuel, spark (ignition), and compression - are required. If all
three components are present, the engine should operate. If any one of the three are
missing, weak or arriving at the wrong time, the engine will not operate.
2.
3.
Determine if there is fuel present by looking down the carburetor venturi while actuating
throttle. There should be a stream of fuel coming out of the accelerator pump nozzles
if the carburetor has fuel.
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.
4.
Run a compression check on engine to make sure the engine is mechanically OK.
Index
Page 1C-8
90-861327--1 OCTOBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 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 Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
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