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Bellows for marine drive and transmission

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Bellows for marine drive and transmission

DAM Marine, specialist in mechanical parts for boat engines since 1975, supports you in maintaining your transmission. A vital safety component, the sterndrive bellows ensures the watertightness of your propulsion system. Discover our guide to understand its role, identify signs of wear and choose the right part (Mercruiser, Volvo Penta, OMC, etc.) from more than 70,000 references in stock.

Select your motorisation: Mercruiser, Volvo Penta, OMC, etc.

To simplify your search and guarantee the compatibility of the parts, the DAM Marine offer is organised by engine brand. Whether you sail with a Volvo Penta, Mercruiser, OMC, Yanmar or Suzuki transmission, we have the exact references for your model.

Access the main categories directly for your purchase:

Our catalogue covers a wide range, including popular models such as the Mercruiser Alpha One or the Bravo series, ensuring fast delivery of the essential components for your boating.

What is a sterndrive bellows and what is its role?

The sterndrive is the “Z”-shaped propulsion unit that transfers power from the engine to the propeller while also acting as a rudder. To operate, this mechanism uses moving parts that pass through the hull. This is where the bellows comes in.

In practical terms, it is a flexible ribbed rubber part, accordion-style, designed to absorb trim and steering movements. Its role is both critical and twofold:

Absolute watertightness: The U-joint bellows protects the universal joint that connects the engine to the sterndrive. If it is punctured, water enters the boat and can seriously damage the bearings and engine.
Mechanical protection: It keeps the grease needed to lubricate the mechanisms inside, protected from corrosive water and salt.

There are several types of protection on a transmission: the U-joint bellows, the most critical one; the exhaust bellows or exhaust sleeve, which evacuates exhaust gases and cooling water; and the shift cable bellows, which protects the gear shift control. On a system such as the Mercruiser sterndrive, these elements form a vital barrier between your engine compartment and the marine environment.

Why and when should you replace your sterndrive bellows?

Rubber is a living material that deteriorates over time due to salt, hydrocarbons and, above all, UV exposure. A simple crack in a Mercruiser bellows or Volvo bellows can turn a sea trip into a major breakdown, such as water ingress or irreversible corrosion of the universal joint.

Signs of wear to watch for

A careful visual inspection is recommended every year, ideally during winterisation or when the boat is lifted out. Pay attention to the following symptoms:

Presence of cracks or micro-cracks in the rubber folds, especially in tension areas.
Hardening of the material, with loss of flexibility.
Traces of rust or grease on the U-joint bellows, indicating a loss of watertightness.
Shells or deposits trapped in the folds, which can act like razor blades.

Expert advice: Manufacturers such as Mercury or Volvo generally recommend preventive replacement every 2 years. Even though fresh water is less aggressive, the risk of rubber drying out during dry storage justifies this frequency. Do not wait for a breakdown before starting your search for replacement parts.

Essential items for installation and maintenance

To ensure a durable repair, it is not recommended to replace a bellows on its own. The safest and most economical option remains the maintenance kit for replacing bellows. At DAM Marine, we offer all-in-one solutions suited to your transmission.

These sets generally include:

The different sterndrive bellows: U-joint, exhaust and cable.
The installation seal and the necessary rings.
Stainless steel hose clamps, essential to prevent corrosion.
The gimbal bearing, often wise to replace at the same time.

For installation, the use of a specific bellows adhesive may be required to ensure a perfect chemical seal between the rubber and the metal. Discover, for example, our Mercruiser bellows adhesive to complete your repair successfully.

FAQ on boat sterndrive and transmission bellows

What is the difference between U-joint bellows and exhaust bellows?

The U-joint bellows must be completely watertight because it protects the mechanical transmission, the universal joint, from water. The exhaust bellows or tube is used to channel exhaust gases and cooling water towards the propeller. On some models such as the Mercruiser Alpha, the exhaust bellows may have vents or may not be attached on both sides to prevent overpressure, unlike the U-joint bellows, which is a critical area.

How can I identify my sterndrive model: Alpha, Bravo, SX?

To order the right bellows, identify your exact model. At Mercruiser, the Alpha One, Gen 1 or Gen 2, is very common on medium-power engines, while the Bravo series, 1, 2 or 3, is fitted to larger units. At Volvo Penta, SX or DP DuoProp models are common. The sterndrive serial number is the safest way to validate your purchase cart.

Should I replace the manifolds at the same time?

Not systematically, but removing the sterndrive allows you to check for the presence and condition of the exhaust flaps, or non-return shutters. If they are damaged, this is often a sign of upstream overheating. It is therefore the ideal time to inspect the corrosion condition of your exhaust manifolds and elbows, because a leak at this level or defective flaps can cause water backflow that may be fatal for the engine.

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Bellows for marine drive and transmission

Stern drive bellows for Mercruiser Alpha...

Soufflets embase et transmission bateau Omc

Volvo Penta stern drive bellows

Soufflets embase et transmission bateau...

43 item(s)

VOLVO CARDAN BASE BELLOWS

RÉF. 182765 | ORBITRADE

CV joint boot for Volvo Penta SX - DPS and OMC Cobra drive including clamp.

Application :

OMC COBRA

DP-SM, DP-S, DP-S1, DPS-A

DPS-A OXi, DPS-B, DPS-B OX, DPS-B1

DPS-B1 OX, DP-SMTD, FWD, SX-A

SX-C, SX-C1, SX-C1AC, SX-C2

SX-CT, SX-CT1, SX-CT2, SX-M

SX-M1, SX-MTD, SX-MTD3, SX-R

SX-RT1, SX-RT2, SX-S, SX-SLT

TSK DP-S, TSK SX-C, TSK SX-C1, TSK SX-C1AC

TSK SX-C2AC, TSK SX-CLT M10, TSK SX-CLT1, TSK SX-M

TSK SX-MACLT, TSK SX-MBAC, TSK SX-MDA, TSK SX-MDB

TSK SX-MDC, TSK SX-MHP, TSK SX-MLT, TSK SX-R

TSK SX-R1, TSK SX-R2, TSK-A-32, TSK-A-32-NPT

TSK-A-42, TSK-A-42-NPT, TSK-A-52-NPT, TSK-A-AC-32

TSK-A-AC-32-NPT, TSK-A-AC-42, TSK-A-AC-42-NPT, TSK-A-AC-52

TSK-A-AC-52-NPT, TSK-A-OX-32, TSK-A-OX-42, TSK-A-OX-52

TSK-B-32, TSK-B-32-NPT, TSK-B-42, TSK-B-42-NPT

TSK-B-52, TSK-B-52-NPT, TSK-B-AC-32, TSK-B-AC-32-NPT

TSK-B-AC-42, TSK-B-AC-42-NPT, TSK-B-AC-52, TSK-B-AC-52-NPT

TSK-B-OX-32, TSK-B-OX-42, TSK-B-OX-52, TSK-C-32

TSK-C-42, TSK-C-52, TSK-C-52-NPT, TSK-C-AC-32

TSK-C-AC-32-NPT, TSK-C-AC-42, TSK-C-AC-42-NPT, TSK-C-AC-52

TSK-C-AC-52-NPT, TSK-C-OX-32, TSK-C-OX-42, TSK-C-OX-52

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€55.20 VAT included

€46.00 VAT excluded

VOLVO EXHAUST BASE BELLOWS

RÉF. 19848 | ORBITRADE

Exhaust bellows for Volvo Penta outdrives:

AQ200, AQ250, AQ270, AQ275

AQ280, AQ280DP, AQ290, AQ290DP

DP-A, DP-A1, DP-A2, DP-B

DP-B1, DP-C, DP-C1, DP-D

DP-D1, DPX, SP-A, SP-A/MT

SP-A1, SP-A2, SP-C, DP-E

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€56.40 VAT included

€47.00 VAT excluded

VOLVO CARDAN BASE BELLOWS

RÉF. 19294 | ORBITRADE

CV joint boot for Volvo Penta outdrive including clamps.

Premium quality.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€51.60 VAT included

€43.00 VAT excluded

OEM MERCRUISER CABLE BELLOWS

RÉF. 74639Q02 | MERCRUISER

Original Mercruiser OEM cable boot for Alpha One and Bravo outdrives.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€34.03 VAT included

€28.36 VAT excluded

MERCRUISER CABLE BELLOWS BASE

RÉF. 34639 | EMP

Cable boot for Mercruiser Alpha One and Bravo outdrive including clips and clamp.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€21.00 VAT included

€17.50 VAT excluded

VOLVO EXHAUST BASE BELLOWS

RÉF. 182764 | ORBITRADE

Exhaust bellows for Volvo Penta SX - DP-SM and OMC Cobra outdrives.

Hose clamp included.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€55.20 VAT included

€46.00 VAT excluded

OEM MERCRUISER BASE EXHAUST BELLOWS

RÉF. 8M0124227 | MERCRUISER

Original Mercruiser exhaust bellows for Alpha and Bravo bases.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€54.77 VAT included

€45.64 VAT excluded

MERCRUISER BASE EXHAUST BELLOWS

RÉF. AP500 | EMP

Exhaust bellows for Mercruiser engines with an Alpha or Bravo base.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€35.88 VAT included

€29.90 VAT excluded

MERCRUISER ALPHA G2 OEM BASE CARDAN BELLOWS

RÉF. 816431A1 | MERCRUISER

Original Mercruiser universal joint bellows for Alpha One G2 base.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€126.07 VAT included

€105.06 VAT excluded

VOLVO DPH-DPR BASE CARDAN BELLOWS

RÉF. 19509 | ORBITRADE

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€68.40 VAT included

€57.00 VAT excluded

VOLVO DPH BASE EXHAUST BELLOWS

RÉF. 19753 | ORBITRADE

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€68.40 VAT included

€57.00 VAT excluded

MERCRUISER ALPHA ONE G1 BASE CARDAN BELLOWS - TRS

RÉF. 34239 | EMP

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€70.68 VAT included

€58.90 VAT excluded

MERCRUISER ALPHA ONE G2 GASKET BELLOWS

RÉF. AP2691 | EMP

Cardan bellows for Mercruiser Alpha one G2 base.

Bellows including ring.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€82.80 VAT included

€69.00 VAT excluded

VOLVO SX-DPS-A EXHAUST BASE BELLOWS

RÉF. 19916 | ORBITRADE

Exhaust bellows for Volvo Penta SX-A and DPS series outdrives:

DPS-A, DPS-A OXi, DPS-B, DPS-B OX

DPS-B1, DPS-B1 OX, FWD, SX-A

TSK-A-OX-32, TSK-A-OX-42, TSK-A-OX-52, TSK-B-32

TSK-B-32-NPT, TSK-B-42, TSK-B-42-NPT, TSK-B-52

TSK-B-52-NPT, TSK-B-AC-32, TSK-B-AC-32-NPT, TSK-B-AC-42

TSK-B-AC-42-NPT, TSK-B-AC-52, TSK-B-AC-52-NPT, TSK-B-OX-32

TSK-B-OX-42, TSK-B-OX-52, TSK-C-32, TSK-C-42

TSK-C-52, TSK-C-52-NPT, TSK-C-AC-32, TSK-C-AC-32-NPT

TSK-C-AC-42, TSK-C-AC-42-NPT, TSK-C-AC-52, TSK-C-AC-52-NPT

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€62.40 VAT included

€52.00 VAT excluded

BAGUE SOUFFLET DE CARDAN EMBASE MERCRUISER ALPHA G2 816607

RÉF. 89181 | GLM

Bague seule pour soufflet de cardan sur embase Mercruiser Alpha one G2.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€23.88 VAT included

€19.90 VAT excluded

EXHAUST BELLOWS BASE VOLVO DP-G DPX-A

RÉF. 19384 | SLP

Exhaust bellows for Volvo Penta DP-G and DPX-A types.

Livraison express → Thursday 09 July

Livraison classique → Monday 13 July

Commandez dans les

00 h 00 m 00 s

Disponible

€60.00 VAT included

€50.00 VAT excluded

43 item(s)

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Filter by engine

Bellows for marine drive and transmission

Select your motorisation: Mercruiser, Volvo Penta, OMC, etc.

What is a sterndrive bellows and what is its role?

Why and when should you replace your sterndrive bellows?

Signs of wear to watch for

Essential items for installation and maintenance

FAQ on boat sterndrive and transmission bellows

What is the difference between U-joint bellows and exhaust bellows?

How can I identify my sterndrive model: Alpha, Bravo, SX?

Should I replace the manifolds at the same time?

43 item(s)

VOLVO CARDAN BASE BELLOWS

VOLVO EXHAUST BASE BELLOWS

VOLVO CARDAN BASE BELLOWS

OEM MERCRUISER CABLE BELLOWS

MERCRUISER CABLE BELLOWS BASE

VOLVO EXHAUST BASE BELLOWS

OEM MERCRUISER BASE EXHAUST BELLOWS

MERCRUISER BASE EXHAUST BELLOWS

MERCRUISER ALPHA G2 OEM BASE CARDAN BELLOWS

VOLVO DPH-DPR BASE CARDAN BELLOWS

VOLVO DPH BASE EXHAUST BELLOWS

MERCRUISER ALPHA ONE G1 BASE CARDAN BELLOWS - TRS

MERCRUISER ALPHA ONE G2 GASKET BELLOWS

VOLVO SX-DPS-A EXHAUST BASE BELLOWS

BAGUE SOUFFLET DE CARDAN EMBASE MERCRUISER ALPHA G2 816607

EXHAUST BELLOWS BASE VOLVO DP-G DPX-A