1A-2 - GENERAL INFORMATION
90-823224--2 796
How To Read Parts Manual
841-81631
1
CYLINDER BLOCK ASSEMBLY
1
N.S.S.
2
PLUG, expansion (1-1/4”) (GM #3738306)
2
22-87238
3
DRAIN COCK, cylinder block
2
19-34270
4
PLUG, expansion - cylinder block (1-5/8” Diameter)
8
17-35465
5
PIN, dowel - block to head (5/16” Diameter)
4
22-72640
6
PLUG, expansion - camshaft bearing hole
1
23-85674
7
BEARING UNIT, camshaft (set)
1
72638
8
LIFTER, hydraulic valve
16
431-5943
9
CAMSHAFT
1
35378
10
CHAIN, camshaft timing
1
43-35338
11
SPROCKET, camshaft timing
1
43-48338
12
SPROCKET, crankshaft timing
1
10-34505
13
BOLT, camshaft timing sprockets (3/4”)
3
12-39167
14
WASHER, camshaft timing sprocket bolt
3
841-8163 Cylinder Block Assembly includes only standard pistons,
piston rings, crankshaft bearings and camshaft bearings.
PART NO.
REF.
NO.
DESCRIPTION
QUAN.
a
A.
Part Number:
For part ordering - Note N.S.S. for Reference Number 2, Plug, expansion - that means Not Sold Sepa-
rately by Mercury Marine, however, in this case, the G.M. Part Number (for the plug) is given in the Description Column.
B.
Reference Number:
For part Shown on exploded parts view.
C.
Description:
This is the most important column because it gives:
1) Description of Part: Ref. No. 1 is a Cylinder Block Assembly, No. 9 is a Camshaft, etc.
2) What parts are included with a certain part: Notice how the Description of Part, for Ref. Nos. 1 and 8 thru 14, are
at the left side of the column. Description of Part for Ref. Nos. 2 thru 7 are indented under “Cylinder Block Assembly”.
If Ref. No. 1 (Cylinder Block Assembly) was ordered, all indented parts (Ref. Nos 2thru 7) would come with the part.
Ref. Nos. 8 thru 14 would not come with Ref. No. 1 and would have to be ordered separately. If 2 Cylinder Blocks
were listed, both cylinder blocks would come with the indented parts. In some cases, an indented part will have anoth
er part indented under it. The second indented part will come with the first indented part.
3) Serial number break: If serial number information is listed, check product serial number to ensure that correct part
is ordered.4) Special information: Many times special information will be shown after description such as; L.H. Rota
tion, R. H. Rotation, Filter up, Filter Down, etc. This will help in selecting the correct part.
D.
Quantity:
Quantity that has to be ordered.
E.
Special Information Block:
Additional information, part numbers for gasket sets, etc.
M0033-
D8
b
c
d
e
CYLINDER BLOCK AND CAMSHAFT
