Mariner Mercury 105/140 JET, Service Manual

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4A-22 - POWERHEAD 90-824052R3 JUNE 2002
IMPORTANT: We recommend that you use new
needle bearings at reassembly for lasting repair.
However, if needle bearings must be re-used,
keep each set of bearings identified for
reassembly on same connecting rod.
a
51088
a - Needle Bearing Locating Washers
12. Remove upper end cap and lower end cap from
crankshaft.
a
b
51848
a - Upper End Cap
b - Lower End Cap
13. Remove and discard O-ring seals from each end
cap.
14. Remove oil seal(s) from end of each end cap by
driving seal out with a punch and hammer.
15. Inspect roller bearing in upper end cap as out-
lined in “Cleaning and Inspection”.
NOTE: If roller bearing is damaged, replace upper
end cap and roller bearings as an assembly.
b
a
51853
a - O-Ring
b - Seal
16. Remove crankshaft and place in powerhead
stand as shown.
IMPORTANT: DO NOT remove crankshaft sealing
rings from crankshaft, unless replacement of a
sealing ring(s) is necessary. Usually, crankshaft
sealing rings do not require replacement, unless
broken.
CAUTION
Safety glasses should be worn when removing or
installing crankshaft sealing rings.
IMPORTANT: DO NOT remove oil pump drive
gear on crankshaft unless gear is damaged; i.e.
cracked, gear teeth chipped or fretting, or exces-
sive looseness. Refer to “Section 3E” for proper
oil drive gear installation procedures.
51847
a
b
a - Sealing Rings
b - Oil Pump Drive Gear