SKU: 11578520139

Exhaust Flapper with Grommets – Fits MerCruiser Stern Drives 2.5L, 3.0L, 3.7L (Replaces 60930, 18-2727)

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Description

Exhaust Flapper with Grommets – Fits MerCruiser Stern Drives 2.5L, 3.0L, 3.7L (Replaces 60930, 18-2727)Exhaust Flapper with Grommets Fits MerCruiser Stern Drives 2. 5L, 3. 0L, 3. 7L (Replaces 60930, 18 2727) This exhaust flapper is designed for MerCruiser Stern Drive applications, including 4 Cylinder 2. 5L, 3. 0L, and 3. 7L engines manufactured between 1982 and 1998, as well as V8 engines equipped with a Jackshaft from 1985 onwards. It serves as a direct replacement for several OEM and aftermarket part numbers, ensuring compatibility and a proper fit

Exhaust Flapper with Grommets – Fits MerCruiser Stern Drives 2.5L, 3.0L, 3.7L (Replaces 60930, 18-2727)

This exhaust flapper is designed for MerCruiser Stern Drive applications, including 4-Cylinder 2.5L, 3.0L, and 3.7L engines manufactured between 1982 and 1998, as well as V8 engines equipped with a Jackshaft from 1985 onwards.

It serves as a direct replacement for several OEM and aftermarket part numbers, ensuring compatibility and a proper fit for your engine's exhaust system.

  • Installation Type: Direct Replacement
  • Fuel Compatibility: Gasoline
  • Included Components: Includes one exhaust flapper and two grommets for a complete installation.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury MerCruiser 60930 / 25-43809
Sierra 18-2727
Mallory 9-42800

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke Years OEM Part No. Notes
MerCruiser 4-Cylinder 2.5L 4-Stroke 1982-1998 60930
MerCruiser 4-Cylinder 3.0L 4-Stroke 1982-1998 60930
MerCruiser 4-Cylinder 3.7L 4-Stroke 1982-1998 60930
MerCruiser V8 with Jackshaft Various 4-Stroke 1985-Up 60930

Technical Specifications

Specification Value
Product Type Exhaust Flapper Shutter
Installation Direct Replacement
Fuel Type Gasoline
Housing Material Premium Metal and Rubber
Dimensions 79 mm × 94 mm (3.1" × 3.7") [width × length]
Other Technical Attributes High hardness, durable construction

Package Contents

  • 1 x Exhaust Flapper (60930)
  • 2 x Grommets

Installation Guide

  1. Safety First: Ensure the engine is completely cool and the battery is disconnected before starting.
  2. Locate Flapper: Identify the exhaust flapper's location, typically within the Y-pipe or exhaust outlet housing.
  3. Remove Old Components: Carefully remove the old, worn-out exhaust flapper and its grommets. This may require prying.
  4. Clean Housing: Thoroughly clean the inside of the housing, removing any carbon buildup, rust, or old rubber fragments.
  5. Install New Grommets: Press the two new grommets firmly into their designated holes in the housing.
  6. Insert New Flapper: Align the pins on the new exhaust flapper with the holes in the grommets and slide it into place.
  7. Verify Movement: Check that the flapper can swing open and closed smoothly without sticking or binding.
  8. Final Check: Reconnect the battery, start the engine, and listen for any unusual noises or check for exhaust leaks.

Troubleshooting & FAQ

Q: How do I confirm this exhaust flapper fits my engine?

A: This part fits MerCruiser 4-Cylinder (2.5L, 3.0L, 3.7L) engines from 1982-1998 and V8 models with a jackshaft (1985-Up). To be certain, please verify your OEM part number is 60930, 18-2727, or 9-42800 and check the compatible models table.

Q: What are the symptoms of a bad exhaust flapper?

A: Common signs of a failing flapper include a distinct rattling or clattering noise from the exhaust at idle speeds, water backing up into engine cylinders, or visible cracks and deterioration on the flapper itself upon inspection.

Q: How often should I inspect or replace the exhaust flapper?

A: It is recommended to inspect your exhaust flappers annually during routine maintenance. We suggest replacement every 3-5 years, or immediately if you notice any signs of damage, to prevent catastrophic engine failure from water ingestion.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement 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 an aftermarket replacement 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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 11578520139

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