32-44348T 4" Upper Exhaust Bellows for MerCruiser 120 140 V-6 V-8
32-44348T 4" Upper Exhaust Bellows for MerCruiser 120 140 V-6 V-8 is backordered and will ship as soon as it is back in stock.
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32-44348T 4" Upper Exhaust Bellows for MerCruiser 120 140 V-6 V-8
32-44348T 4" Upper Exhaust Bellows for MerCruiser 120 140 V-6 V-8 is backordered and will ship as soon as it is back in stock.
SERDAMARINE / MARINE EXHAUST PARTS
Upper Exhaust Bellows — 4-Inch Upper Tube
This upper exhaust bellows (exhaust boot) replaces Mercury / MerCruiser 32-44348T on MerCruiser 120, 140, and selected V-6 and V-8 sterndrive applications. It has a 4-inch (102 mm) inside diameter and a 4.25-inch (108 mm) length, servicing the upper-tube position—including selected V-6 and V-8 setups with a 4-inch center-mounted riser to a 4-inch elbow—rather than the separately identified 4-inch lower exhaust tube.
Configuration & Specifications
| Position | Upper exhaust connection (4-inch upper tube; not the separately identified 4-inch lower exhaust tube) |
|---|---|
| Inside Diameter | 4" (102 mm) |
| Length | 4.25" (108 mm) |
| V-6 / V-8 Connection Configuration | 4" center-mounted riser to 4" elbow |
Engine Applications
Engine family or a 4-inch diameter alone does not identify the correct exhaust boot; match the upper-versus-lower installation position, existing part number, 4-inch (102 mm) inside diameter, 4.25-inch (108 mm) length, and the 4-inch center-mounted riser-to-4-inch elbow layout on V-6 and V-8 installations.
- MerCruiser 120, 140 — Stern drive engines; upper exhaust bellows / 4-inch upper tube position (4" / 102 mm inside diameter, 4.25" / 108 mm long). Fits when specified
- MerCruiser Select V-6 and V-8 — Stern drive engines; upper exhaust connection with a 4" center-mounted riser to a 4" elbow (4" / 102 mm inside diameter, 4.25" / 108 mm long). Fits when specified
Reference Numbers
The numbers below are listed for part identification and cross-reference only; they do not by themselves establish universal interchangeability or original-equipment manufacturer status.
| Mercury Mariner / MerCruiser Stern / Out Drive | 32-44348T, 32-44348 |
|---|---|
| Mercury Mariner | 3244348T, 44348T, 32-44348001, 3244348001, 44348001, 31-44348001 |
| Mallory Marine | 9-72805 |
| Sierra Marine | 18-2748 |
| GLM | 89120 |
| RECMAR | REC32-44348001 |
| Additional Reference | CEF500507K |
Supplied Parts
- Upper exhaust bellows (exhaust boot)
Service & Installation Notes
General service guidance only. Use the service manual for your exact engine and exhaust configuration.
- Shut down the engine, allow all exhaust components to cool completely, and disable the starting system to prevent accidental cranking.
- Compare the removed boot with the replacement to verify the 4-inch (102 mm) inside diameter, 4.25-inch (108 mm) length, and upper-tube position before installation.
- Clean and inspect the mating exhaust surfaces so the clamping areas are free of scale, corrosion, or old rubber residue.
- Seat the boot squarely across the connection points and secure it according to the procedures in your engine service manual.
- After reassembly, inspect the joint under normal operating conditions; if any exhaust leakage or abnormal condition is found, stop the engine immediately and inspect the connection.
Questions Before Replacement
Can this boot be used as the 4-inch lower exhaust tube?
No. This part is specifically the upper exhaust bellows (4-inch upper tube, 4.25 inches long) and is not the separately identified 4-inch lower exhaust tube.
Which MerCruiser V-6 and V-8 exhaust setup uses this upper boot?
On selected MerCruiser V-6 and V-8 sterndrive engines, it fits the upper connection between a 4-inch center-mounted riser and a 4-inch elbow requiring a 4-inch (102 mm) ID by 4.25-inch (108 mm) boot.
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