Repair - Yanmar BY Series Service Manual

Repair

12/05

REPAIR

Before performing any repair procedures, always
do the following first:
1. Disconnect battery cables at the battery. Always
disconnect negative (-) battery cable first.
2. Close all valves in the fuel supply system.
3. Remove electrical connections, intake and
exhaust system connections, and fuel supply
lines from engine. Cap or plug all open fuel
connections.
4. Drain engine coolant from cylinder block.
5. Remove engine from boat. Mount engine to a
suitable engine repair stand having adequate
weight capacity.
6. Cap or plug all openings to prevent
contamination.
7. Remove starter motor and alternator.
8. Clean engine by washing with solvent, air or
steam cleaning. Carefully operate cleaning
equipment so as to prevent any foreign matter
or fluids from entering engine or damaging any
fuel system or electrical components remaining
on the engine.
9. Remove cooling system components from
engine.
10. Drain engine oil into a suitable container.
Remove oil filter.
BY Service Manual
© 2009 Yanmar Marine International
ENGINE
5-15