88
PREDELIVERY
WATER TEST AND FINAL ADJUSTMENTS
WATER TEST AND FINAL
ADJUSTMENTS
An in the water test is required to make sure the
outboard(s) and boat are rigged correctly, propel-
ler selection is correct, and that all accessories
function properly.
Pay special attention to the following, especially if
the boat is repowered with new outboard(s):
•
Engine mounting height
•
Jack plate adjustment
•
Correct propeller selection and WOT RPM
•
Fuel system vacuum
•
Engine water pressure/optional water screens
Make all needed adjustments or repairs and retest
before delivery.
When ready for delivery, give all instruction
sheets, operating instructions and user guides
provided with accessories to the owner. Advise
the owner of any special operation or mainte-
nance information contained in the instructions.
IMPORTANT:
Complete the Predelivery Check-
list and obtain owner’s signature at the time of
delivery. The Predelivery Checklist must be kept
on file for seven years.
Engine Mounting Height and Jack
Plate Adjustment
Goals include:
•
Engine RPM within the full throttle operating
range
•
Best acceleration and top speed
•
No excessive ventilation while boat is coming
onto plane.
Start with the engine lower on the transom. Make
a test run, taking note of engine RPM, water pres-
sure, trim level and boat speed. Refer to the
Water Pressure Chart
on p. 89.
Raise the engine or jack plate and repeat the pro-
cess until the best acceleration and boat speed
are achieved.
Fuel System Vacuum
Test fuel system vacuum. Refer to the appropriate
service manual. The maximum inlet fuel vacuum
should not exceed 4 in. Hg. (13.5 kPa) at the inlet
to the fuel lift pump under any operating condi-
tions (IDLE to WOT).
A higher vacuum indicates an excessive restric-
tion in the fuel supply. Repair as needed.
Engine Water Pressure
Check engine water pressure. Confirm adequate
water pressure at all engine speeds and in turns.
Refer to the
Water Pressure Chart
on p. 89.
If water pressure falls below acceptable levels,
adjust outboard alignment (multiple engine instal-
lations), or consider installing optional high flow
water screens. Refer to appropriate parts catalog
for available water screens.
