134
POWERHEAD
INSPECTION
Use Gel Seal and Gasket Remover to remove all
traces of gaskets, adhesives, and Gel-Seal II from
the cylinder block and crankcase.
Carefully remove any carbon accumulation from
the tops and ring grooves of the piston. A ring
groove cleaning tool can be made by breaking an
old ring and grinding an angle on its end. Do not
damage ring grooves while cleaning.
Thoroughly wash entire cylinder block and crank-
case with warm, soapy water to remove all traces
of contaminants.
Air dry cylinder block and crankcase. Blow out all
holes and passages with compressed air.
Cover the cylinder walls with a liberal amount of
Johnson/Evinrude Outboard Lubricant to protect
them from corrosion.
INSPECTION
Before any inspection process can begin, all inter-
nal components must be clean and free of excess
oil. Refer to CLEANING on p. 133.
Make a visual inspection of all internal compo-
nents. Check for unusual wear patterns, scuffing
or deterioration of aluminum parts, heat-related
discoloration of bearings or bearing surfaces, and
broken components.
Use a micrometer to measure the diameter of
each crankpin and main bearing journal. Measure
the lower main bearing journal if the bearing was
removed. Refer to TECHNICAL DATA on p. 18 for
dimensions.
Check for cylinder head warpage using a piece of
bar stock or machinist's straightedge and a feeler
gauge set.
• Cylinder head warpage must not exceed 0.004
in. (0.10 mm) per inch of measurement.
Replace head if warpage exceeds this dimen-
sion.
34865
WARNING
To avoid personal injury, wear eye protec-
tion and set compressed air pressure at
less than 25 psi (172 kPa).
TYPICAL 32389
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