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Liens rapides
Stainless Steel Thru-Hulls
and Scupper Valve
Installation Instructions
66540 - 66557, 66576 - 66579 and 67550-67580 Series
SAVE THESE INSTRUCTIONS
Form Number 69373 Rev G
This product carries a limited Lifetime Warranty.
See www.attwoodmarine.com or Product Catalog for details.
WARNING:
Read all instructions carefully before installing and using this product. To
prevent injury, remove boat from water when installing this product and
before using 120V power tools.
The stainless steel Thru-Hull and Scupper Valve must be mounted above
the boat's maximum water line as determined by the boat's draft at the
maximum loading recommended by the boat manufacturer. On sailboats,
mount the thru-hull high enough on the center of the transom to be above
the water line at all times.
REQUIRED FOR INSTALLATION
• Expandable wrench (max. 2-1/2", 64mm)
• Hole saw (see chart for size)
• Cordless drill
• Polyurethane marine sealant
THRU-HULL INSTALLATION
Thru-Hull
Thread
Part Number
Length
66540-1
Short
66546-1
Standard
66541-1
Short
66547-1
Standard
66542-1
Short
66548-1
Standard
66543-1
Short
66549-1
Standard
66544-1
Short
66550-1
Standard
66545-1
Short
66551-1
Standard
66552-1
Standard
90° Thru-Hull
Part Number
66576-1
Standard
66577-1
Standard
66578-1
Standard
66579-1
Standard
Narrow-Flange Thru-Hull
Part Number
67555-1
Standard
67554-1
Standard
67556-1
Standard
67557-1
Standard
67551-1
Standard
67558-1
Long
67562-1
Long
67561-1
Long
Mount Thru-Hull in the transom or side of hull, at least 12" (305mm) above
maximum water line. If possible, place fi tting on the same side as the
steering wheel so the driver can see discharge of water when the pump
is working properly.
Hose
Hole Saw
I.D.
Size
5/8" I.D.
1-1/8"
5/8" I.D.
1-1/8"
3/4" I.D.
1-1/8"
3/4" I.D.
1-1/8"
1" I.D.
1-1/2"
1" I.D.
1-1/2"
1-1/8" I.D.
1-1/2"
1-1/8" I.D.
1-1/2"
1-1/4" I.D.
1-3/4"
1-1/4" I.D.
1-3/4"
1-1/2" I.D.
2"
1-1/2" I.D.
2"
2"
2-1/2"
5/8" I.D.
1-1/4"
3/4" I.D.
1-1/4"
1" I.D.
1-5/8"
1-1/8" I.D.
1-5/8"
5/8" I.D.
1-5/16"
3/4" I.D.
1-5/16"
1" I.D.
1-5/16"
1-1/8" I.D.
1-5/16"
1-1/2" I.D.
2"
3/4" I.D.
1-5/16"
(min.1-9/16")
1-1/2" I.D.
1-15/16"
(min.1-9/16")
1-1/8" I.D.
1-5/16"
(min.1-9/16")
1. Use a hole saw (see chart above for size – check against thru-hull) to
cut hole in the transom or hull. (See Figure 1)
Figure 1
Hose at Upward Angle
08-03
2. Remove tightening nut. Apply a small bead of marine sealant in the
groove under the Thru-Hull fl ange.
3. Place Thru-Hull into the hole. After this point, all connections may be
made from inside the hull.
4. Place tightening nut onto threads, with wide side toward hull. Tighten
fi rmly, but do not damage gelcoat by overtightening. To prevent turning,
grip the Shaft Wrench Fitting (on Standard Thread models) or the
Notched End (on Short Thread models).
5. Lead hose from bilge pump to Thru-Hull at an upward angle. Fasten
tightly at both ends with hose clamps.
SCUPPER VALVE INSTALLATION
Scupper Valve Thread
Part Number
66557-1
Max. Hull
66553-1
Thickness
66555-1
5/8"
67553-1
1-1/16"
67581-1
5/8"
67580-1
1-5/8"
67583-1
5/8"
1-3/4"
67582-1
5/8"
The Attwood Stainless Steel Scupper Valve is designed for boats with a
1-3/4"
self-bailing cockpit. The fl apper valve opens outward to allow water to exit
5/8"
and automatically closes to help prevent backwash from entering the cockpit.
1-7/8"
Mount Scupper in the transom at least 12" (305mm) above maximum
5/8"
water line.
1-7/8"
1. Use a hole saw (see chart above for size - check against scupper) to
2"
cut hole in the transom or hull. (See Figure 2.)
2. Remove tightening nut. Apply a small bead of marine sealant in the
groove under the Scupper fl ange.
3. Place Scupper Valve into the hole. After this point, all connections may
1-1/16"
be made from inside the hull.
1-1/16"
4. Place tightening nut onto threads, with wide side toward hull. Tighten
1-1/4"
fi rmly, but do not damage gelcoat by overtightening. To prevent turning,
grip the Shaft Wrench Fitting with an expandable wrench.
1-1/4"
5. Lead hose (see chart above for size) from cockpit to Scupper at a
downward angle. Fasten tightly at both ends with hose clamps.
7/8"
Figure 2
3/4"
7/8"
3/4"
1"
Shaft Wrench Fitting
2-1/2"
Scupper Valve
2-1/2"
At Least
12" Above
2-1/2"
Maximum
Water Line
© 2008 Attwood Corporation
1016 N. Monroe Street, Lowell, MI 49331-0260 www.attwoodmarine.com
Notch for
Tightening
Shaft Wrench Fitting
Hose
Clamps
Hose
Length
I.D.
Short
1-1/2" I.D.
Standard
1-1/2" I.D.
Standard
2" I.D.
Standard
1-1/2" I.D.
Standard
1-1/2"
Standard
2"
Standard
2-1/2"
Standard
3"
Cockpit Drain (#3882-1)
Cockpit
Hose
Clamps
Hose
See Chart
Hole Saw Size
Marine Sealant
Thru-Hull
(short thread)
Marine Sealant
Thru-Hull
(standard thread)
See Chart for
Hole Saw Size
Maximum
Water Line
Hole Saw
Max. Hull
Size
Thickness
2"
1-7/8"
2"
3"
2-1/2"
2"
2-1/8"
2-3/4"
2-3/8"
1-1/8"
2-3/8"
1-1/8"
3-5/8"
1-1/2"
3-5/8"
1-1/2"
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