IMPORTANT:Handlepistonswithcareanddonot
attempt to force them through cylinder until cyl-
inder is honed to correct size, as this type piston
can be distorted by careless handling.
b. Measure piston diameter at skirt across cen-
ter line of piston pin as shown.
5.
Thoroughly clean cylinder bores with hot water
and detergent. Scrub well with a stiff bristle brush
and rinse thoroughly with hot water. It is extreme-
ly essential that a good cleaning operation be
performed. If any abrasive material remains in
cylinder bores, it will rapidly wear new rings and
cylinder bores in addition to bearings lubricated
by the contaminated oil. Swab bores several
times with light engine oil on a clean cloth, then
wipewithacleandrycloth.Cylindershouldnotbe
cleaned with kerosene or gasoline. Clean re-
mainder of cylinder block to remove excess ma-
terial spread during honing operation.
PISTON SELECTION
72624
1.
Check used piston to cylinder bore clearance as
follows:
c. Subtract piston diameter from cylinder bore
diameter to determine piston-to-bore clear-
ance.
a. Measure cylinder bore diameter with a tele-
scopegauge2-1/2in.(64mm)fromtopofcyl-
inder bore as follows.
d. Determine ifpiston-to-boreclearanceisinac-
ceptable range shown in “Specifications.”
2.
3.
If used piston is not satisfactory, determine if a
new piston can be selected to fit cylinder bore
within acceptable range.
If cylinder bore must be reconditioned, measure
new piston diameter (across centerline of piston
pin), then hone cylinder bore to correct clearance
(preferable range).
4.
Mark piston to identify cylinder for which it was
fitted.
72570
Index
3A-62 - 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