Seacock (Seawater Inlet Valve)
Seawater Pickups
If a seacock is being used, it must be installed be-
tween water pickup and seawater pickup pump (or
sea strainer), to allow operator to shut off the seawa-
ter in case of a leak or when boat is not in use. This
will allow the operator to flush or drain the engine, or
clean the sea strainer while boat is in the water. Sea-
cock used must have an internal cross-sectional
area equal to or greater than hose to prevent restrict-
ing water flow. Install seacock in an area where it will
be easily accessible and self-supporting to prevent
hose fatigue.
NOTICE
Refer to manufacturer’s instructions for in-
formation on removal and installation of
other than Quicksilver Seawater Pickups.
IMPORTANT: Seal the inside edges of any hole
made through the hull with a suitable sealant to
prevent water absorption and deterioration.
Thru-Hull Mounted
a
b
d
b
c
a
72639
d
c
70355
a - Seawater Pickup
b - Seawater Inlet Slots (Must Face Forward - Parallel With
Water Flow
c - Mounting Screw Holes (If Equipped)
d - Nut
1.
2.
Seal inside edges of 1-3/4 in. (44 mm) hole in hull
using a suitable sealer.
Seacock (with Thru-Hull Pickup Shown)
a - Hose Connector 1-1/4 In. (32 mm) I.D. To Seawater Pump
Inlet
b - Seacock 1-1/4 In. (32 mm) Brass Ball Or Gate Valve
c - Seawater Pickup
Apply marine caulking (sealer) to mounting sur-
face on seawater pickup where hull contact will
occur when installed.
d - Direction Of Seawater Flow
3.
Ensure slots in seawater pickup are facing for-
ward (toward bow of boat) and install seawater
pickup through hull. The slots must be parallel
with flow of water.
Sea Strainer
If boat is equipped with a sea strainer, it must be of
sufficient size to ensure that an adequate supply of
water is maintained for engine cooling. Install
seawater strainer in an area where it will be easily
accessible for inspection and cleaning. Strainer
should be installed in water inlet hose after water inlet
valve to allow operator to shut off water when
cleaning strainer.
4.
Fasten pickup with four appropriate mounting
screws (if so designed).
5. Apply marine caulking as needed inside boat.
Apply Loctite to threads of nut and install on pick-
up on inside of boat and torque nut to 35 lb. ft.
(42 N·m).
NOTE: If pickup being installed does not have
mounting screws on underside where mounted to
hull, be certain, after nut is torqued, that slots are still
facing forward.
Index
90-823324--2 796
SEAWATER COOLED SYSTEMS - 6A-3
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you