42
Trailering your boat
Before moving your boat, check the ground clearance of the
drive unit. When trailering, the drive unit may be in the up or
down position. There must be at least approx. 15 inches (40
cm) clearance between the lower gear unit and the ground.
If the clearance is less than 15 inches (40 cm), raise the
drive unit.
Caution!
Be very careful when you back out of driveways or cross
railroad tracks, so that the lower gear unit does not hit
the ground.
Make sure that the boat fits the trailer properly. In many cases,
loss of performance and speed is due to improper trailer
support and too much tie-down pressure, which causes the
boat bottom to deform. The boat should rest firmly on the
trailer with maximum tie-down pressure applied at the bow
and transom only.
Propeller selection
Your Volvo Penta dealer has chosen a propeller designed to
deliver top performance and economy under most conditions.
To obtain the maximum percentage of available horsepower,
the engine RPM at full throttle should be in the specified full
throttle operating range. Refer to
Specifications section for
full throttle RPM range.
Propellers that allow full throttle operation at the upper end
of the RPM range provide faster planing time for water ski-
ing or similar activities. Propellers that place full throttle op-
eration RPM in the middle of the range provide improved
cruising fuel economy.
•
If the engine’s full throttle RPM with a normal load is
below the specified range
or on the low side of the
range (1), use propellers with
less
pitch to
increase
the
RPM.
•
If the engine’s full throttle RPM
exceeds the specified
range
(2), use propellers with
higher
pitch to
decrease
the RPM.
Engine damage can result from incorrect propeller selection
that
1. Prevents engine RPM from reaching the specified full
throttle operating range (e.g., laboring engine.) Install
lower pitch propeller(s).
2. Allows engine RPM above the specified full throttle oper-
ating range (e.g., overspeeding engine). Install higher
pitch propeller(s).
Caution!
D-series aluminum propeller sets are not recommended
for use on Duoprop-equipped boat and engine combi-
nations that are capable of speeds in excess of 43 MPH
(35 knots). F-series stainless steel propeller sets should
be used in these applications.
If you use D-series aluminum propeller sets, you must also
use an in-trim limiter kit. See your Volvo Penta dealer.
1
A
vai
la
bl
e hor
sepow
e
r
(%
)
2
100%
90%
80%
70%
60%
50%
40%
30%
Full Throttle
Operating Range
Full throttle
operating range
22381
Summary of Contents for 4.3OSi-C
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