# 98618A1 Mercruiser Heat Exchanger Bracket (Set) | Genuine Used Part

🔧 Product Description

  

Genuine MerCruiser 470 3.7L Heat-Exchanger Mounting Bracket Set - Part Number: 98618A1

  

A genuine used MerCruiser heat-exchanger mounting-bracket set for Mercury's 224 CID inline-four 470-series petrol engines.

  

The bracket assembly supports and positions the engine heat exchanger, maintaining clearance from the exhaust, belts and surrounding engine components.

  

⚙️ Key Features

  

• Genuine used MerCruiser heat-exchanger bracket set

• Current OEM assembly number 98618A1

• Supersedes 91907A1 and 77226

• Designed for Mercury 224 CID inline-four engines

• Supplied as the bracket set shown

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 98618A1 → Supersedes 91907A1

• 91907A1 → Supersedes or incorporates earlier bracket reference 77226

  

OEM / Related Numbers:

  

• 98618A1

• 91907A1

• 77226

• Related heat exchanger, mounting cushions and retaining straps

• Related cooling hoses, clamps and mounting bolts

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Published MerCruiser applications include:

• 470 2 BBL, 1976-1979: 4208730-5520114

• 470 2 BBL, 1980-1982: 5520115-6218036

• 470, 1983-1984: 6218037-6916778

• 470 MIE, 1980-1981: 5520115-6218036

• 485 2 BBL, 1980-1982: 5685394-6218036

• 170 2 BBL, 1985-1986: 6916779-0B434940

• 165 2 BBL, 1987: 0B434941-0B774251

• 190 4 BBL, 1985-1986: 6916779-0B436390

• 180 4 BBL, 1987: 0B436391-0B775248

• 3.7L 2 BBL, 1988-1989: 0B774252 and above

• 3.7LX 4 BBL, 1988-1989: 0B775249 and above

  

• Engine Type: Mercury-designed inline four-cylinder petrol engine

• Engine Capacity: 224 CID / 3.7L

  

🔌 Function

  

The brackets support the heat exchanger and maintain the correct position for cooling hoses, mounting cushions and service access.

  

Common signs of failure:

  

• Brackets are cracked or bent

• Heat exchanger vibrates

• Mounting holes are enlarged

• Cooler contacts the engine or exhaust

• Hose connections are placed under strain

• Corrosion weakens the bracket

• Retaining hardware repeatedly loosens

  

📦 Condition

  

• Supplied as a set where shown

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 25.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Outboard Brackets & Mounting Components | Engine Mounts & Brackets

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 25.00 AUD | In stock |

## Images

- 98618A1 Mercruiser Heat Exchanger Bracket (Set) | Genuine Used Part
- 98618A1 Mercruiser Heat Exchanger Bracket (Set) | Genuine Used Part
- 98618A1 Mercruiser Heat Exchanger Bracket (Set) | Genuine Used Part
- 98618A1 Mercruiser Heat Exchanger Bracket (Set) | Genuine Used Part
- 98618A1 Mercruiser Heat Exchanger Bracket (Set) | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/98618a1-mercruiser-heat-exchanger-bracket-set-genuine-used-part)
> Updated: 2026-07-20