Thunderbolt IV Ignition
System
Replacement Parts Warning
! WARNING
Electrical, ignition and fuel system components
on your MerCruiser are designed and manufac-
tured to comply with U.S. Coast Guard Rules and
Regulations to minimize risks of fire and explo-
sion.
Identification
Use of replacement electrical, ignition or fuel
system components, which do not comply with
these rules and regulations, could result in a fire
or explosion hazard and should be avoided.
Thunderbolt IV (HEI)
Electronic Ignition System
Torque Specifications
Fastener Location
Distributor Clamp
In. Lb. Ft. Lb.
N·m
27
71790
20
15
Spark Plugs (14 mm)
20
DISTRIBUTOR
MOUNTED ON EXHAUST ELBOW
WITH
IGNITION
MODULE
Ignition Module
Retaining Screws
(Stainless Steel)
10
1.1
Tools/Lubricants/Sealants
a
Description
Part Number
Timing Light
91-99379
91-99750
Multi-Meter / DVA
Torch Lamp
91-63209
Insulating Compound
92-41669--1
Quicksilver Liquid
Neoprene
92-27511-2
Loctite 271
Obtain Locally
Thermalconductive
Grease
72722
DISTRIBUTOR
WITH
IGNITION
MODULE
MOUNTED ON DISTRIBUTOR BODY
a - Ignition Module
NOTE: Except for igntion module replacement, re-
pair procedures for both distributors are the same.
Index
90-823224--2 796
IGNITION SYSTEM - 4B-1
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
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