Mercury 30 Service Manual

4-16 - POWERHEAD 90-826148R2 MARCH 1997
7. Uneven Wear:Unevenwear couldbecausedby
a bent connecting rod.
51853
a
a - Uneven Wear Between Arrows
CAUTION
Crocus cloth MUST BE USED to clean bearing
surface at CRANKSHAFT END OF CONNECTING
ROD.
320 grit Carborundum cloth MUST BE USED to
clean bearing surface at PISTON PIN END OF
CONNECTING ROD.
VERIFY CAP TO ROD ALIGNMENT BEFORE
TORQUING ROD BOLTS.
DO NOT continue to clean connecting rod bear-
ing surfaces after marks have been removed.
51083
NOTE: Wash rod to remove abrasive grit and
apply 2 cycle oil to bearing surfaces to
prevent rust.
a
b
c
d
a - 320 Carborundum Cloth
b - Crocus Cloth
c - To Drill Motor
d - Torque to 16 lb. (21.7 N×m)
NOTE: Wash rod to remove abrasive grit and apply
2 cycle oil to bearing surfaces to prevent rust.
Cleaning and Inspection
Cylinder Block and Crankcase Cover
IMPORTANT: Crankcase cover and cylinder
block are matched, line-bored assembly should
not be mismatched by using a different crank-
case cover or cylinder block.
52651
· Inspect cylinder block and crankcase cover for
cracks or fractures.
· Check gasket surfaces for nicks, deep grooves,
cracks and distortions that could causecompres-
sion leakages.
· Check that all water passages in cylinder block
arenotobstructed.Checklocatingpinsincylinder
block that they are tight.
· Check crankcase cover fuel/bleed passages that
they are not obstructed. Verify that check valves
in crankcase cover are not damaged.
· Thoroughly clean cylinder block and crankcase
cover. Verify that all sealant and old gaskets are
removed from matching surfaces. Clean all car-
bon deposits from exhaust ports.
· Inspect spark plugholes for stripped or damaged
threads.

Mercury 30 Specifications

General

Brand	Mercury
Model	30
Category	Outboard Motor
Language	English