IGNITION SYSTEM
SERVICE MANUAL NUMBER 24
EFI / MPI Models
1.
2.
3.
Connect timing light to number 1 spark plug wire.
Start engine and run at 1300 rpm until it reaches normal operating temperature.
Stop engine and connect the scan tool or timing tool to the DLC connector on the EFI/
MPI wiring harness.
4.
Start engine, allow rpm to stabilize.
NOTE: MEFI-1 models only, manually adjust remote control throttle lever to get 1200 engine
rpm.
NOTE: MEFI-2 and MEFI-3 models only, ECM will automatically adjust engine rpm to
approximately 1200 rpm when put in the service mode on a scan tool or when using the
timing tool.
5.
Check ignition timing. If incorrect, rotate the distributor until timing is correct. Torque
clamping screw to 18 lb-ft (25 Nm).
6.
7.
8.
9.
Recheck ignition timing.
Disconnect scan tool or timing tool from DLC connector.
If required, return remote control throttle lever to idle position and shut off engine.
Restart engine, increase rpm to 1300 then return to idle position slowly. Ensure that
engine returns to idle rpm. Readjust throttle cable, if required.
10.
Shut engine off.
Spark Plugs
Removal
1.
Disconnect spark plug wires (high tension leads) from spark plugs.
NOTE: Use care when removing spark plug wires and boots from spark plugs. Twist the boot
1/2
turn before removing. Firmly grasp and pull on the boot to remove the wire end.
2.
Remove spark plugs.
NOTE: A “thin-walled” spark plug socket may be required.
Inspection
1.
Inspect each spark plug for manufacturer and spark plug number. All plugs must be from
the same manufacturer and have the same spark plug number. Refer to SECTION 1B.
-
“Specifications” for spark plug numbers.
Page 4B-6
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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