Exhaust Riser - $325 (Waretown)

Nautilus Road

condition: new

make / manufacturer: Osco

model name / number: 98504A3

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Osco 8503A is a 3-inch, 15-degree down-angle cast iron exhaust riser (elbow) designed for Mercruiser V6 and V8 center-riser manifolds (1983-1986, some later). It directly replaces Mercury Quicksilver #98504A3, GLM 51110, and Sierra 18-1970-1.

Parts are still in the box. NEW...Boxes have never been opened. NEW...

Price above is for both, (2) risers.

post id: 7928167248

posted: 2026-04-16 14:46

updated: 2026-05-01 12:53

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Exhaust Riser - boat parts - by owner - marine sale - craigslist

Osco 8503A is a 3-inch, 15-degree down-angle cast iron exhaust riser (elbow) designed for Mercruiser V6 and V8 center-riser manifolds (1983-1986, some later). It directly replaces Mercury...