Volvo Penta 21389074 Saildrive Bellows Kit - Complete Rubber Diaphragm Seal for 110S 120S 130S 150S MS25S

Vendor: JLM Marine
Availability: In Stock
Product Type: Bellow
$98.50
$98.50
Subtotal: $98.50

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Volvo Penta 21389074 Saildrive Bellows Kit - Complete Rubber Diaphragm Seal for 110S 120S 130S 150S MS25S - JLM Marine Boat Parts Limited

Volvo Penta 21389074 Saildrive Bellows Kit - Complete Rubber Diaphragm Seal for 110S 120S 130S 150S MS25S

$98.50

Volvo Penta 21389074 Saildrive Bellows Kit - Complete Rubber Diaphragm Seal for 110S 120S 130S 150S MS25S

$98.50

Volvo Penta 21389074 Saildrive Bellows Kit

This saildrive bellows kit is a direct replacement for Volvo Penta 21389074, designed to create a watertight barrier between the saildrive unit and the hull. It is a critical component for preventing water intrusion and protecting the engine from potential damage. Engineered to accommodate engine movement and vibration, the assembly ensures a secure and durable seal.

Manufactured from a marine-grade EPDM/NBR rubber compound, this bellows is resistant to saltwater, fuel, oil, and temperature extremes ranging from -40°C to +120°C. It is designed to replace Volvo Penta part numbers 21389074, 872026, 854934, and 21112450.

  • Fits 110S, 120S, 130S, 150S, and MS25S series saildrives.
  • Engineered for a durability of over 500,000 flex cycles.
  • Kit includes all necessary gaskets, plates, and hardware for a complete installation.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across brands.

Brand Part Number
Volvo Penta 21389074
Volvo Penta 872026
Volvo Penta 854934
Volvo Penta 21112450

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Series Rated HP Years Notes
Volvo Penta 110S Series 10-15 HP 1985-2010 Single-cylinder
Volvo Penta 120S Series 18-22 HP 1990-present All variants A-E
Volvo Penta 130S Series 25-30 HP 1995-present All variants
Volvo Penta 150S Series 35-40 HP 1995-2020 Three-cylinder
Volvo Penta MS25S Series 20-25 HP 1990-2015 All variants

Technical Specifications

Specification Value
Part Number 21389074
Gross Weight 1.5 kg (3.31 lbs)
Material Marine-grade EPDM/NBR rubber
Temperature Range -40°C to +120°C (-40°F to +248°F)
Pressure Rating 2.5 bar (36.3 psi)
Cycle Life 500,000+ flex cycles
Warranty 1 Year

Package Contents

  • Main rubber bellows assembly
  • Comprehensive gasket set
  • Cover plate and sealing components
  • Installation hardware
  • Detailed instructions

Installation Guide

Warning: Bellows failure can lead to rapid water intrusion. Replacement is a critical safety task. Professional installation is recommended, especially for those with limited mechanical experience.

  1. Preparation: Safely haul the vessel out of the water and secure it. Ensure the engine is properly supported before detaching the saildrive.
  2. Access: Clear the engine compartment to gain full access to the saildrive and bellows assembly.
  3. Disassembly: Carefully detach the saildrive unit from the hull and engine, following the manufacturer's specific procedures for your model.
  4. Removal: Remove the old bellows, clamp, and sealing components. Thoroughly clean the mounting surfaces on both the hull and the saildrive unit.
  5. Inspection: Inspect the saildrive unit for any signs of wear, corrosion, or damage before proceeding.
  6. Installation: Fit the new bellows, gaskets, and cover plate. Ensure all components are correctly aligned.
  7. Securing: Install and tighten all hardware to the manufacturer's specified torque values. This step is critical for a watertight seal.
  8. Reassembly: Reattach the saildrive unit to the engine and hull.
  9. Final Checks: Once the vessel is back in the water, immediately check for any signs of leaks around the new bellows. Monitor closely during the first few hours of operation.

Troubleshooting & FAQ

Q: How often should I replace my saildrive bellows?
A: It is recommended to replace the bellows every 7 years or 500 operating hours, whichever comes first. Regular visual inspection for cracks or wear is also advised.

Q: Can I install this myself?
A: Yes, if you have intermediate mechanical skills and the proper tools (socket set, torque wrench, engine support). However, due to the critical nature of this part, professional installation is recommended to ensure a safe and leak-proof result.

Q: What are the warning signs that my bellows needs immediate replacement?
A: Any water discovered in the engine compartment or bilge, visible cracks or perishing in the rubber, unusual vibration from the saildrive unit, or oil contamination on the bellows surface are all critical warning signs.

Q: What is the difference between an OEM part and thiskit?
A: This listing is anreplacement part, not an OEM component. We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is anreplacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.

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Основанная в 2002 году, компания JLM Marine зарекомендовала себя как специализированный производитель высококачественных морских деталей, базирующийся в Китае. Наша приверженность совершенству в производстве заслужила нам доверие ведущих мировых морских брендов.

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