32
OUTBOARD INSTALLATION
HULL PREPARATION
Transom Brackets and Jack
Plates
When mounting an outboard on a jack plate:
• Refer to t he manufa cturer's recommend ations
for maximum weight and horsepower.
• The jack plate must pro vide a rig id, one -piece
mounting assembly—eithe r a solid surface, or
surfaces adequately connected to prevent flex-
ing or twisting.
• DO NOT use a jack plate constructed in two
separate p ieces—lack of support can twist the
stern b rackets, wea r tilt tub e bushin gs a nd
thrust rollers, and bend or break components.
IMPORTANT: Damage caused by use of a two-
piece jack plate or unstable mounting surface will
not be covered by warranty.
Recommended Designs
Not Recommended
Whenever possible, use mounting hardware sup-
plied with the outboard to install jack plate on tran-
som. Tighten to a torque of 40 ft. lbs. (54 N·m).
To prevent damage to outboard,
check installation frequently for:
• Loose mounting bolts and nuts
• Loose tilt tube or steering cable nuts
• Elongated mounting holes
• Bent or deformed washers
Replace any hardware that fails to maintain
torque specifications.
Mounting Hardware
Outboard mou nting hardware must meet min i-
mum specifications for material and strength:
• Material: S tainless stee l; Group 1,2,3 per
ASTM F593 OR Grade A2 per ISO 3506-1.
• Strength: Minimum proof load.
Outboard mou nting bolt s, backing plate s, wash-
ers, and nut s a re used to attach the ou tboard to
the shipping p allet. If altern ate bolt lengths or
replacement p arts are r equired, u se only
Evinrude/Johnson Genuine Parts.
IMPORTANT: Standard screws offered b y loca l
merchants may not provide the high streng th
required for outboard installations.
007992 007991
DR5703
A WARNING
Use all mounting hardware supplied with
the outboard to help ensure a secure
installation. Substituting inferior hardware
can result in loss of control.
Part
Number
Length
(inches)
Thread
Size
Proof Load
Minimum
(lbs.)
327053 3 1/2-13 18,520
318573 3.5 1/2-13 12,771
336676 4.75 1/2-13 12,771
331578 5 1/2-13 18,520
354101 6 1/2-13 18,520
354102 7 1/2-13 18,520
354103 8 1/2-13 18,520
354104 9 1/2-13 18,520
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