Mariner 30 JET 40 (4 CYL) Service Manual page 170

4. If removed, place reed block locating pins into
cylinder block.
b
a - Reed Block Locating Pin
b - Main Bearing Support Locating Pin (on Some Models, Pin
is Located in Bearing Support)
c - Lubricate Cylinder Walls, Pistons and Piston Rings with
Light Oil
5. Install crankshaft assembly into cylinder block.
Remove ring compressors as each piston enters
cylinder. Make sure that crankshaft is kept hori-
zontal while installing.
a - Keep Crankshaft Horizontal
90-814676R1 DECEMBER 1996
a
54726
c
54727
a
6. Align centermain bearing and reed blocks with lo-
cating pins and push centermain bearing and
reed blocks downward to seat them in cylinder
block.
a
a - Align Centermain Bearing Support and Reed Blocks with
Locating Pins and Push Downward to Seat
7. Check each piston ring for spring tension thru the
exhaust ports by pressing with a screwdriver. If
no spring tension exists (ring fails to return to
position), it is likely that the piston ring was bro-
ken during assembly [replace broken piston
ring(s)]. Use caution not to burr piston or ring dur-
ing inspection.
a - Screwdriver
b - Piston Rings
54728
b
a
54729
POWERHEAD - 4-41