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Block Riser Extension Exhaust Spacer 3 Inch for Mercruiser Center Rise 83-03

  • Part #: OSC3320

$79.95

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  • Additional fees for this product
    Eastern States Risers/Elbows/Spacers Shipping
    States this fee will apply to.
    AL, CT, DC, DE, FL, GA, IL, IN, KY, LA, MA, MD, ME, MI, MS, NC, NH, NJ, NY, OH, PA, RI, SC, TN, VA, VT, WI, WV, ,
    $12.00
    Western States Risers/Elbows/Spacers Shipping
    States this fee will apply to.
    AR, AZ, CA, CO, IA, ID, KS, MN, MO, MT, ND, NE, NM, NV, OK, OR, SD, TX, UT, WA, WY, HI, ,
    $18.00

3" spacer used on Mercruiser applications. It goes between the manifold and the riser elbow. This item is used on all V6 and V8 Mercruisers with center riser manifolds from 1983 and up. It will fit Osco # 9745, Osco # 7114B & Osco # 9011 manifolds. It uses Osco # 8503-GR / Osco # 8503-GB / Osco # 8503-GO gaskets
Replaces: Mercury Quicksilver # 93322; Barr # MC-20-93320A3; GLM # 50300; Sierra # 18-1908; Mallory # 9-40530
NOTE: This item WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
Genuine  Osco  Parts



SIE18-1908
Brand Model Year HP Serial # Notes
Mercruiser Stern Drive BLACK SCORPION 350 MAG SKI GEN+ 1997
Mercruiser Stern Drive BLACK SCORPION 350 MAG SKI GEN+ 1998
Mercruiser Stern Drive 5.7L EFI MIE GM 1997
Mercruiser Stern Drive 5.7L CARB MIE
Mercruiser Stern Drive 5.7L COMPETITION SKI GEN+ GM 1998
Mercruiser Stern Drive 7.4L MPI MIE (L29) GEN. VI GM 1998
Mercruiser Stern Drive 350 MAG MPI MIE (GEN+) GM 350 V-8 1998
Mercruiser Stern Drive 454 MAG. MPI HORIZON (GEN. VI) GM
Mercruiser Stern Drive 8.2L MIE MPI (GEN. VI) GM
Mercruiser Stern Drive 350 MAG MPI SKI (GEN+) GM 350 V-8 1998 AND UP
Mercruiser Stern Drive 7.4L BRAVO (MPI)(GEN. VI) GM 1998
Mercruiser Stern Drive 350 MAG MPI ALPHA/BRAVO
Mercruiser Stern Drive 454 MAG MPI BRAVO (GEN VI) GM 1998
Mercruiser Stern Drive 5.7L EFI GM 1998
Mercruiser Stern Drive 5.7L 2 BBL GM 1998
Mercruiser Stern Drive 4.3L (GEN +) 2 BBL. GM
Mercruiser Stern Drive 4.3LH GEN + 4 BBL. GM
Mercruiser Stern Drive 4.3L EFI (GEN+) TBI GM
Mercruiser Stern Drive 5.0L EFI GM 1998
Mercruiser Stern Drive 5.0L 2 BBL GM 1998
Mercruiser Stern Drive 502 MAG MPI BRAVO (GEN VI) GM 1998
Mercruiser Stern Drive 454 MAG MPI BRAVO (GEN VI) GM
Mercruiser Stern Drive 502 MAG. MPI BRAVO (GEN VI) GM
Mercruiser Stern Drive 8.2L MIE MPI (GEN. VI) GM
Mercruiser Stern Drive 454 MAG. MPI HORIZON (GEN. VI) GM
Mercruiser Stern Drive 454 MAG. MPI HORIZON (GEN. VI) GM
Mercruiser Stern Drive 350 MAG MPI HORIZON MIE
Mercruiser Stern Drive 350 MAG MPI MIE
Mercruiser Stern Drive MX 6.2L MPI MIE
Mercruiser Stern Drive 5.7L EFI GM 1998
Mercruiser Stern Drive 350 MAG MPI ALPHA/BRAVO
Mercruiser Stern Drive 5.0L EFI GM 1998
Mercruiser Stern Drive 4.3L EFI (GEN+) TBI GM
Mercruiser Stern Drive BLACK SCORPION MX SKI GEN+ 1997
Mercruiser Stern Drive BLACK SCORPION MX SKI GEN+ 1998
Mercruiser Stern Drive MX 6.2L MPI BRAVO
Mercruiser Stern Drive 357 ALPHA 4V 2008
Mercruiser Stern Drive 357 MAG BRAVO 4V 2008
Mercruiser Stern Drive 357 ALPHA 4V 2009
Mercruiser Stern Drive 357 MAG BRAVO 4V 2009
Mercruiser Stern Drive 4.3L (GEN +) (4BBL) REMAN 2009
Mercruiser Stern Drive 383 MAG BRAVO 4V 2008
Mercruiser Stern Drive 383 MAG BRAVO 4V 2009
Mercruiser Stern Drive BLACK SCORPION 350 MAG SKI GEN + 1999
Mercruiser Stern Drive BLACK SCORPION 350 MAG SKI GEN + 2000
Mercruiser Stern Drive BLACK SCORPION 350 MAG SKI GEN + 2001
Mercruiser Stern Drive BLACK SCORPION MX SKI GEN + 2001
Mercruiser Stern Drive BLACK SCORPION MX SKI GEN + 2002


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