Inspection - Mercury MerCruiser D2.8L D-Tronic Service Manual

ENGINE MECHANICAL

Inspection

CRANKSHAFT
1. Visually inspect crankshaft for scratches, nicks, cracks and seizure marks. Replace if
damaged.
IMPORTANT: No material may be removed, either by hand or machine grinding, from
thrust faces of crankshaft.
2. Replace crankshaft if machined surfaces on front and rear ends or threaded areas of
crankshaft ends are out-of-round, worn or damaged.
3. After a seizure, over-heating or grinding, crankshaft must be Magnafluxed to verify no
surface cracks are present.
NOTE: It will be necessary to measure inner diameter of bearings in carriers and outer
diameter of matching crankshaft journal to determine maximum clearance. Refer to the
following section - Main Bearings (Measurement).
4. Measure journals of crankshaft to determine if replacement or grinding is necessary.
Refer to specifications.
Page 3A-124
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002