GENERAL INFORMATION
38 eng
Component Identification
1 - Top cowl
2 - Side cowl latches (both
sides)
3 - Front cowl latch
4 - Auxiliary tilt switch
5 - Clamp/Swivel bracket
6 - Gearcase
7 - Cooling water intake
(location dependent on
gearcase)
8 - Skeg
9 - Anode plate
10 - Anti‑ventilation plate
11 - Drive shaft housing
12 - Water pump indicator
13 - Bottom cowl
Propeller Selection
Propping the engine at the higher end of the RPM range may increase
acceleration, but decrease top boat speed. Conversely, propping the engine at
the lower end of the range may increase top boat speed but hinder
acceleration. Mercury Marine recommends selecting a propeller that allows the
engine to operate in the upper half of the recommended full throttle RPM range
with the boat normally loaded (refer to General Information ‑ Specifications).
This RPM range allows for better acceleration while maintaining maximum boat
speed.
All "L" models (20 in. driveshaft) are capable of operating at engine speeds in
excess of 6200 RPM. This increased engine speed gives the operator a greater
range of pitch selection. However, propping at the uppermost limit of the RPM
range may not necessarily result in improved high speed performance. Boat
weight and hull design influence the effectiveness of this increased engine
speed and may decrease top boat speed.
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