Mercury 90 - Page 248

4-36 - POWERHEAD 90-830234R3 DECEMBER 1997
• Remove thermostat housing and components.
b
c
a
d
25907
a - Bolts
b - Thermostat Cover
c - Thermostat
d - Poppet Valve
• Remove cylinder block cover.
20039
NOTE: There are “pry-slots” on casting as shown by
screwdriver positions.
• Remove exhaust cover and divider plate.
20029
• Remove 3 bolts from crankcase end cap (lower).
a
20020
a - End Cap Bolts
• Remove crankcase bolts, and cover.
20032
• Remove crankcase end cap (lower).
• Remove oil seal and O-ring seal.
20342 20341
a
b
a - Oil Seal
b - O-Ring
• Some models may have a wear sleeve with an
O-ring seal. See page 4-39.