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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.
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1.
0188 Riser, 3-3/8"
outlet, 90º down angle. Replaces
OMC #’s 980020 and 980188. Use
mounting kit # 0188-MK.
2.
0188-MK Mounting Kit,
fits riser 0188. Includes 0188-G
gasket and mounting hardware to
bolt riser to adapter.
3.
0188-G Gasket, riser.
Included in 0188-MK mounting
kit. Replaces OMC # 908013.
4.
9863 Riser, 31/2"
exhaust outlet 60º down angle.
Fits Ford and GM V8 log style
manifolds. Osco does not offer a
manifold for OMC Ford
applications. Replaces OMC #’s
909218, 982680 and 909863. Use
mounting kit 9863-MK.
5.9863-MK
Mounting Kit, Riser. Fits
9863 and 9863-T risers. Includes
9863-G gasket and mounting
hardware.
6.9863-G
Gasket, riser to manifold.
Included in 9863-MK. Replaces
OMC # 909786.
7.
9863-T Riser, Same as
9863 but tapped to accept 3/4"
MPT hose barb. Use mounting kit
9863-MK.
8.
50456 Riser, 4” exhaust
outlet, 7º down angle. Fits Ford
and GM V8 center riser style
manifolds. Osco does not offer a
manifold for OMC Ford
applications. Replaces OMC #’s
913784, 3855270 and 3850456.
9.
50456-MK Mounting Kit,
riser. Fits 50456 riser.
Includes 50456-G gasket and
mounting hardware.
10.
50456-G Gasket, riser to
manifold. Included in 50456-MK.
Replaces OMC # 913783.
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Please Remember
we stock parts and accessories
for all makes and models of
marine engines and boats. These
catalog pages represent just a
few of the parts we stock. Use
the search field on the right to
search by part the Part Number
with the abbreviation at the
bottom of each page. If you do not find what you are
looking for please fill out the
info form and we will find
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