Engine Exhaust Riser Kit 6"

Model # 21173463 Mfg # 8M0153486
3.2 out of 5 Customer Rating
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
Engine Exhaust Riser Kit 6" image number 0
Engine Exhaust Riser Kit 6" image number 1
Engine Exhaust Riser Kit 6"
Model # 21173463 Mfg # 8M0153486
3.2 out of 5 Customer Rating
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
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Quicksilver Engine Exhaust Riser Kit 6"

The Quicksilver 8M0153486 is a genuine OEM exhaust riser kit delivering 6 inches (152 mm) of rise for Emissions Control (EC) and select non-emissions controlled MerCruiser engine applications. Sold as a pair, these risers are hot-dipped and top-coated to provide long-lasting corrosion resistance in demanding marine environments. The primary function of the riser kit is to elevate the exhaust system on compatible V-6 and V-8 small block engines, preventing water ingestion through the exhaust—a critical protection measure for inboard and sterndrive installations.

This kit is specifically engineered for newer catalytic engine applications and fits a broad range of MCM (sterndrive), MIE (inboard), and Ski configurations from 2008 onward. It also accommodates certain non-emissions controlled engines, making it a versatile replacement or upgrade option. Supersedes part numbers including 8M0104211, 8M0092052, 879288A30, and 8M0094682.

Important note: This kit does not include elbow gaskets for fresh water cooled (closed cooling) engines. The FWC elbow gaskets (part number 27-8M2004606) must be ordered separately for closed cooling system applications.

Key Features

  • 6-inch (152 mm) exhaust rise
  • Includes both port and starboard risers (sold as a pair)
  • Hot-dipped and top-coated finish for corrosion resistance
  • Genuine OEM Mercury Marine / Quicksilver part
  • Fits 2008 and newer MCM/MIE/Ski V-6 (4.3L & 4.5L) and V-8 (305, 350 & 377 cid) EC engines
  • Also fits 4.5L V-6 and 6.2L Mercury non-EC engines
  • For newer catalytic engine applications
  • FWC elbow gaskets (27-8M2004606) required separately for closed cooling engines

Compatibility 2008 and newer MCM sterndrive , MIE inboard , Ski V-6 4.3L , Ski V-6 4.5L , Ski V-8 305 cid , Ski V-8 350 cid , Ski V-8 377 cid , 4.5L V-6 non-EC engines , 6.2L non-EC engines
Dimensions 17.50 x 16.50 x 16.50
Engine Type V-6 , V-8
For Use With MerCruiser EC engines , MerCruiser non-EC engines
Quantity Included 2 risers per kit
Type Riser Kit

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