Cleaning and Inspection
Installation
1.
Clean all parts in solvent and dry with com-
pressed air.
1. Using crankshaft gear and sprocket installer, as
shown, install sprocket on crankshaft.
2.
3.
Inspect timing chain for wear and damage.
Inspect sprockets for wear and damage.
Installation
1.
If crankshaft sprocket was removed, install as
outlined in “Crankshaft Sprocket.”
2.
Install timing chain on camshaft sprocket. Hold
sprocket vertical with chain hanging down. Align
marks on camshaft and crankshaft sprockets.
a
IMPORTANT: Do not attempt to drive sprocket on
camshaft, as welsh plug at rear of engine can be
dislodged.
72550
a - Crankshaft Gear And Sprocket Installer (J-1058-20)
3.
Install sprocket on camshaft. Torque bolts to 25
lb. ft. (34 N·m).
2.
3.
Install timing chain as outlined.
4.
Lubricate timing chain with engine oil. Install
crankcase front cover and torsional damper as
outlined.
Install crankcase cover and torsional damper as
outlined.
Checking Timing Chain Deflection
Crankshaft Sprocket
With timing chain and sprockets installed, check tim-
ing chain deflection, as follows:
Removal
1.
Rotate camshaft (in either direction) to place ten-
sion on one side of the chain.
1.
Remove torsional damper and crankcase front
cover as outlined.
2.
Establish a reference point on the block (on taut
side of chain) and measure from this point to the
chain.
2.
3.
Remove camshaft timing chain as outlined.
Remove crankshaft sprocket using crankshaft
gear and sprocket puller (J-24420-B).
3.
Rotate camshaft in the opposite direction to
slacken the chain, then force chain out with fin-
gers and again measure the distance between
reference point and timing chain.
Index
3A-56 - 454 C.I.D. (7.4L) / 502 C.I.D. (8.2L)
90-823224--2 796
| 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
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
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