SERVICE MANUAL NUMBER 25
TROUBLESHOOTING
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.
Thunderbolt V Ignition (No Spark)
Cause
Special Information
Moisture on ignition components
Distributor cap or spark plug wires arcing
Battery, electrical connections, damaged
wiring
Ignition switch
Shift interrupter switch (Alpha One Models
Only)
Shorted tachometer
Ignition timing
Disconnect tachometer and try again
Spark plugs
Fouled, burned, cracked porcelain
Faulty insulation, broken wires
Spark plug wires
Cracked or dirty distributor cap
Faulty ignition components
Check components
Engine synchronizer (if equipped) hooked Synchronizers must be hooked up directly
up series on purple ignition wire (dual
engines only)
coil terminal (parallel chute)
90-861328--1
NOVEMBER 1999
Page 1C-9
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 1262 CID, Mercury MerCruiser 262 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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