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Mercury 45 Jet 50-55 - Installing Outboard Motor on Transom; Determining Recommended Outboard Mounting Height; Locate Centerline of Boat Transom; Lifting Outboard (Electric Start Models)

Mercury 45 Jet 50-55
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OUTBOARD INSTALLATION/ATTACHMENTS - 7A-190-817643R1 DECEMBER 1996
Installing Outboard Motor
on Transom
Determining Recommended
Outboard Mounting Height
It is recommended for best-all-around boating perform-
ance, the outboard should be mounted with the anti-venti-
lation plate parallel to and at the same level as the boat bot-
tom.
On boats with a 20 in. (508mm) transom height, this will re-
quire that the outboard be mounted approximately 1 in.
(25.4mm) high on the transom as the outboard has a 21 in.
(533mm) shaft length.
50563
If, with the outboard mounted so that the anti-ventilation
plate is level with the bottom of the boat, excessive propel-
ler slippage/cavitation is experienced, it is recommended
that the outboard be lowered one position on the transom
to increase propeller “BITE” at a slight loss at top end
speed and increase spray.
NOTE: Raising or lowering the outboard by one mounting
hole will change outboard height by approximately 3/4 in.
(19mm).
Locate Centerline of Boat Transom
Locate (and mark with a pencil) vertical centerline (a) of
boat transom, as shown.
a
AB
CD
NOTE: Dimension “A” & “B” and “C” & “D” are Equal
Length.
Lifting Outboard (Electric Start
Models)
! WARNING
Make sure that lifting eye is threaded into flywheel a
minimum of 5 turns and that hoist has a minimum lift
capacity of at least 500 lbs. (227 kg) BEFORE lifting
outboard.
Remove cowling from outboard and plastic cap from center
of flywheel. Thread lifting eye (a) into flywheel hub a mini-
mum of 5 turns. Replace plastic cap after installation.
Connect hoist [minimum lift capacity of 500 lbs. (227 kg)]
to lifting eye or rings of lift harness and lift outboard onto
boat transom.
50565A
a
b
a - Lifting Ring (P/N 91-75132)
b - Hoist

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