Mercury D2.8L D-Tronic Specifications download pdf (Page 60)

ON THE WATER

SECTION 3

Page 52 CMD-4081850 / 90-860094030 SEPTEMBER 2003

0134

Ventilation

Ventilation is caused by surface air or exhaust gases that are introduced around the

propeller resulting in propeller speedup and a reduction in boat speed. Excessive ventilation

is annoying and usually caused by:

• Drive unit trimmed out too far

• A missing propeller diffuser ring

• A damaged propeller or gear housing, which allows exhaust gases to escape

between propeller and gear housing

• Drive unit installed too high on transom

0039 w changes to fit these diesel engines

Elevation And Climate

NOTE: Engines equipped with EDI (D-Tronic engines) reduce the effects of changes in

elevation and climate by automatically adjusting fuel flow for weather conditions and

elevation. EDI engines however, do not compensate for increased loading or hull conditions.

Elevation and climate changes will affect the performance of your power package. Loss of

performance can be caused by:

• Higher elevations

• Higher temperatures

• Low barometric pressures

• High humidity

For you to have optimum engine performance under changing weather conditions, it is

essential that the engine be propped to allow the engine to operate at or near the top end

of the Rated Engine rpm with a normal boat load during your normal boating weather

conditions.

In most cases, performance can be regained by changing to a lower pitch propeller.

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Mercury D2.8L D-Tronic Specifications Page 60