BRP Evinrude E-TEC Series, Service Manual, Page: 181 / 342

179
POWERHEAD
POWERHEAD ASSEMBLY
10
Pistons
Visually inspect pistons for signs of abnormal
wear, scuffing, cracks, or burning.
Piston Rings
For new ring sets, place each ring separately in its
respective bore. Use a piston to square the ring in
the cylinder. Use a feeler gauge to measure the
ring end gap.
Ring end gap should be:
•
0.011 to 0.019 in. (0.30 to 0.50 mm)
IMPORTANT:
Ring end gap increases approxi-
mately 0.003 in. (0.076 mm) for each 0.001 in.
(0.025 mm) increase in cylinder bore diameter.
DO NOT exceed cylinder oversize dimension.
Use a machinist’s straightedge to check for proper
ring clearance. Position piston rings on piston.
Push rings into groove and hold straightedge
against the side of the piston. Rings must be even
or just below the surface of piston. Rings must
move freely in piston ring groove.
POWERHEAD
ASSEMBLY
IMPORTANT:
Proceed slowly. Make no forced
assemblies unless a pressing operation is called
for. All internal components must be perfectly
clean and lightly coated with outboard lubricant.
IMPORTANT:
Use new wrist pin retaining rings,
gaskets, seals, and O-rings during assembly.
Crankshaft Assembly
Oil the end of the crankshaft. Use Crankshaft
Bearing/Sleeve Installer, P/N 339749, and place a
new lower main bearing onto crankshaft with let-
tered side facing the tool. Install bearing until it
seats on the crankshaft.
Oil the end of the crankshaft. Use Crankshaft
Bearing/Sleeve Installer, P/N 339749, to drive a
new sleeve onto the crankshaft until the installer
contacts the lower main bearing.
007759
31796
007795
007796