Disassembly
5. Slip outer surface of a new top and second com-
pression ring into respective piston ring groove
and roll ring entirely around the groove to make
sure that ring is free as shown. If binding occurs
at any point, determine cause. If caused by ring
groove, remove by dressing with a fine cut file. If
binding is caused by a distorted ring, recheck
with another ring.
Disassemble piston from connecting rod using piston
pin remover as shown. Follow instructions supplied
with kit.
b
a
c
d
e
72365
a - Piston Pin Remover and Installer Kit (J-24086-C)
b - Arched Base
c - Piston
d - Connecting Rod
e - Rod Support
72366
Cleaning and Inspection
6.
Proper clearance of piston ring in its piston ring
groove is very important to provide proper ring
action and reduce wear. Therefore, when fitting
new rings, clearances between ring and groove
surfaces should be measured. See “Specifica-
tions.”
CONNECTING RODS
1.
Wash connecting rods in cleaning solvent and
dry with compressed air.
2.
Check for twisted and bent rods and inspect for
nicks and cracks. Replace damaged connecting
rods.
PISTONS
NOTE:Cylinder bore and taper must be within speci-
fications before pistons can be considered for re-use.
1.
Clean varnish from piston skirts with a cleaning
solvent. DO NOT WIRE BRUSH ANY PART OF
PISTON. Clean ring grooves with a groove clean-
er and make sure oil ring holes are clean.
2.
Inspect piston for cracked ring lands, skirts and
pin bosses, wavy worn ring lands, scuffed or
damaged skirts, and eroded areas at top of pis-
ton. Replace pistons which are damaged or show
signs of excessive wear.
72367
3.
4.
Inspect grooves for nicks and burrs that might
cause rings to hang up.
Measure piston skirt and check clearance as out-
lined under “Piston Selection.”
Index
3A-50 - 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.
Thank you