Mercury MerCruiser D2.8L D-Tronic Service Manual page 187

SERVICE MANUAL NUMBER 22
MODELS WITH 8° DOWN ANGLE TRANSMISSIONS
1. Lift engine into boat and position on engine bed so that transmission output flange and
propeller shaft coupler are visibly aligned (no gap can be seen between coupling faces
when butted together). Adjust engine bed height if necessary to obtain proper
alignment. Do NOT use mount adjustments to adjust engine position at this time.
IMPORTANT: Engine bed must position engine so that a minimum of 6 mm (1/4 in.)
up and down adjustment still exists on all 4 mounts after performing initial alignment.
This is necessary to allow for final engine alignment.
Typical Transmission Shown
2. Ensure that all four mounts are still positioned properly, then fasten mounts to engine
bed with appropriate lag bolts or screws and hardware. Tighten lag bolts or screws
securely.
3. Disconnect and remove sling. Proceed to Engine Final Alignment section.
90-860074--1 FEBRUARY 2002
a-Propeller Shaft
b-Propeller Shaft Coupler
c-Transmission Output Flange
c
a
b
INBOARD (MIE) MODELS
74546
Page 2B-9