MULTI-PORT FUEL INJECTION DESCRIPTIONS AND SYSTEM OPERATION
SERVICE MANUAL NUMBER 23
Base Ignition Timing
In order to check or change base timing on a HEI system the ECM has to be entered into
the service mode by using a scan tool or code tool. The IC module will go to base timing.
The ECM will stabilize timing to allow timing adjustment. The ECM incorporates a spark con-
trol override, which allows timing to be lowered if spark knock (detonation) is encountered
during normal operation. At this time, the timing can be adjusted by turning the distributor.
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Distributor Module Mode
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ECM Control Module
Page 5B-30
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...