General Information; Engine Rotation; Engine Firing Order - Mercury MerCruiser D2.8L D-Tronic Service Manual

SERVICE MANUAL NUMBER 22

General Information

Some repairs, that are listed in this section, must be completed with engine removed from
boat. Engine removal depends upon type of repair and boat design. Place engine on repair
stand for major repairs.
NOTE: This section contains disassembly and assembly procedures of the cylinder block
and cylinder heads only. Refer to other sections for disassembly and assembly of various
other components.
IMPORTANT: Do NOT use any sealers or adhesives containing silicone. Silicone can
cause blockage in the cooling/heat exchanger systems.

Engine Rotation

NOTE: Engine rotation is described when observed from the rear of the engine
(transmission end) looking forward (water pump end).
Left-hand Rotation - All Models

Engine Firing Order

Firing Order: 1-3-4-2
90-860074--1 FEBRUARY 2002
4 3 2 1
D2.8L D-TRONIC
6 5 4
D4.2L D-TRONIC
Firing Order: 1-5-3-6-2-4
ENGINE MECHANICAL
75303
3 2 1
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