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Sierra Catalog
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Osco Marine
Manifolds
Since 1932
OSCO Motors Co. has been in the
business of providing boaters
with a high quality, reasonable
cost alternative to original
manufacturer's equipment.
All manifolds come with a 3 year
warranty and DO NOT include
gaskets. Order gaskets and bolts
separately. We stock all OSCO
manifolds and ship the same day.
CLICK
ON PICTURES OR PART NUMBERS TO
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1.7992
Manifold, starboard.
Fits 454 cu.in. GM big block V8
engines. Replaces Crusader #
97992 and 97114*.
1.7993
Manifold, port. Fits
454 cu.in. GM big block V8
engines. Replaces Crusader
#97993 and 97115*.
2.
799-MK Mounting Kit,
manifold. Fits 7992 / 7993
manifolds. Includes CW-GH gasket
and mounting hardware.
3.CW-GH Gasket, manifold
to cylinder head. Included in
8125-MK. Replaces Crusader #
96653.
4.
7772
Riser, 4". Replaces
Crusader # 97772. Use mounting
kit 7772-MK.
5.
7772-MK
Mounting Kit, riser.
Fits 7772 riser. Includes 6108
gasket and mounting hardware.
6.
7169
Riser, 8". Replaces Crusader #
97169. Use mounting kit 7169-MK.
7.
7169-MK
Mounting Kit, riser. Fits
7169 riser. Includes 6108 gasket
and mounting hardware.
8.
6108
Gasket, riser, 3 holes for
water. Used at manifold with
risers 7772 and 7169. Included
in 7169-MK and 7772-MK.Replaces
Crusader # 96108. Tech tips page
75 and 79.
9.
NWK
Nut and Washer Kit. 4 each
sealing washer and locking nuts.
Replace after each removal.
10.
7924
Elbow, 4" outlet.
Replaces Crusader # 97924. Use
mounting kit 6562-MK.
11.
8068
Elbow, 3" outlet.
Replaces Crusader # 98068. Use
mounting kit 6562-MK
12.
7386
Elbow, jacketed upper for
swivel. Replaces Crusader #
97386. Use mounting kit 6562-MK.
13.
6562-MK
Mounting Kit, elbow. Fits
7924, 8068, and 7386. Includes
6562 gasket and mounting
hardware.
14.
6562
Gasket, elbow, 1 hole for
water. Used with elbows 7924,
8068 and 7386. Included in
6562-MK. Replaces
Crusader # 96562. Tech
tips page 75 and 79..
15.
7387
Elbow, lower swivel with
3" outlet. Replaces Crusader #
97387.
16.
7624
Elbow, lower swivel with
4" outlet. Replaces Crusader #
97624.
17.
7296
Stainless Plate, block
off. Separates fresh water from
raw water. Requires 1 plate and
(2) 6562 or 6108
gaskets per manifold.
Replaces Crusader # 97296. Tech
tips page 75 and 79.
18.
7854
Water Fitting, 90º elbow.
1" MPT x 11/4" hose barb.
Replaces Crusader # 97854. (1)
required for a raw water
cooled manifold and (2)
required for a fresh water
cooled manifold.
19.
F68CS
Water Fitting, straight.
3/4" MPT X 1” hose barb.
Replaces Crusader # 97911. For
risers / elbows.
*Requires one water
fitting 7854 per hose
connection.
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we stock parts and accessories
for all makes and models of
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few of the parts we stock. Use
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with the abbreviation at the
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