3" Wet-Joint Exhaust Hose Bellows Repair Kit for MerCruiser V8

SERDAMARINE / MARINE EXHAUST PARTS

Wet-Joint Manifold Exhaust Hose Bellows Repair Kit for 3-Inch MerCruiser V8 Small-Block Systems

This aftermarket manifold exhaust hose/bellows repair kit is configured for MerCruiser Stern / Out Drive Model 200-320 V8 small-block (GM 305/350/377 CID) marine engines equipped with 3-inch wet-joint exhaust systems from 1983 through 0M serial numbers.

In catalog lookups, OEM reference 32-90949T identifies the 3-inch lower exhaust bellow/tube component rather than an upper bellow or the complete manifold exhaust repair kit.

Configuration & Specifications

Engine Applications

This kit applies to the MerCruiser 3-inch wet-joint small-block V8 configuration listed below. Match your exhaust joint type, 3-inch system diameter, engine displacement, and serial number range before ordering.

• Mercruiser Stern / Out Drive MODEL 200-320 — V8 S.B. (Small-Block), GM 305/350/377 CID; Years / Serial Numbers: 1983 - 0M SN#’s; Exhaust Configuration: Wet Joint Model, 3" system. Fits when specified: Requires 3" wet-joint exhaust configuration on V8 S.B. GM 305/350/377 CID engines within 1983 - 0M SN#’s.

Not Suitable For

• MerCruiser MODEL 120/140 Inline-Four Applications — Single-component cross-references associated with inline-four engines apply to the individual lower bellow/tube reference only, not to this V8 manifold exhaust repair kit. Not suitable

Application Check Required

• 4-Inch Wet-Joint Exhaust Applications — Compatibility with 4-inch wet-joint exhaust systems is not established for this 3-inch repair kit. Confirm application
• All Bravo and Blackhawk Drive Listings — Broader drive-level application notes attached to single aftermarket bellow part numbers do not establish fitment for this complete manifold exhaust repair kit. Confirm application

Reference Numbers

The numbers below are provided for part identification and lookup reference; they do not by themselves establish direct kit interchangeability or manufacturer identity. When comparing exhaust bellows, check the full part number together with the component’s installed position.

Supplied Parts

• Wet-joint manifold exhaust hose bellows repair kit

Service & Installation Notes

General service guidance only. Use the service manual for your exact engine and exhaust configuration.

1. Ensure the engine is completely shut down and cool, and disconnect the battery to prevent accidental cranking before servicing exhaust components.
2. Compare the removed exhaust hoses/bellows with the replacement components by checking the 3-inch connection diameter and the installed upper or lower position on the wet-joint assembly.
3. Clean and inspect the mating necks on the exhaust manifold, elbow/riser, and exhaust tube for corrosion, pitting, or distortion that could affect hose seating.
4. Position and secure the exhaust hose bellows and clamps in accordance with the alignment and tightening procedures in your MerCruiser service manual.
5. After installation, run the engine with proper cooling water supply and inspect all wet-joint hose connections for exhaust gas or cooling water leaks; shut down immediately and inspect if any leakage or overheating occurs.

The Serdamarine Approach

Exhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.

Questions Before Replacement