Replacement Marine Heat Exchangers
A high-quality marine heat exchanger is essential for cooling the engine by removing heat from your engine coolant and transferring it to the surrounding raw seawater. At Marine Parts Source, you can find the right heat exchanger for boat maintenance and repairs. We stock boat heat exchangers from leading brands like Seakamp Engineering and Crusader. Shop for OEM factory heat exchangers or get aftermarket exchangers offering excellent quality at a great price point.
Heat exchangers are available to fit many gas and diesel inboard engines, including some no longer in production like the Universal M-12. You can keep these engines in great condition with a heat exchanger made of marine-grade materials. Select a part to check fitment and compatibility or call Marine Parts Source at 866-388-0390. Most in-stock parts ship the same business day with free ground transit on orders over $100.
Heat Exchangers
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Universal Heat Exchanger | Seakamp 302631SK-302631Qty In Stock: 0Brand: Seakamp EngineeringAftermarket replacement heat exchanger for Universal M4-30 marine engines. Learn More
Universal Heat Exchanger | Seakamp 299835CNSK-299835CNQty In Stock: 0Brand: Seakamp EngineeringPremium aftermarket copper-nickel heat exchanger tank for Universal M-25 marine engines. Learn More
5.7 liter Heat Exchanger | Crusader 98619CRU-98619Qty In Stock: 1Brand: CrusaderHEAT EXCHANGE ASM, RR MP 5.7L Learn More
Small Block Heat Exchanger | Crusader RA147048CRU-RA147048Qty In Stock: 0Brand: CrusaderOEM heat exchanger tank fits Crusader late model 5.7L and 6.0L marine engines. Learn More
Crusader Heat Exchanger | Seakamp Engineering 97930SK-97930Qty In Stock: 0Brand: Seakamp EngineeringAftermarket direct replacement heat exchanger for Crusader 97930. Learn More
Heat Exchanger | Pleasurecraft Marine RA147062PCM-RA147062Qty In Stock: 0Brand: Pleasurecraft MarineHeat Exchanger
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Heat Exchanger | Volvo Penta 22850984VOLVO-22850984Qty In Stock: 0Brand: Volvo PentaHeat Exchanger Learn More
Crusader Heat Exchanger | Seakamp 97876SK-97876Qty In Stock: 0Brand: Seakamp EngineeringAftermarket replacement heat exchanger for Crusader GM V6 marine engines. Learn More
8.1 liter Heat Exchanger | Crusader RA147039CRU-RA147039Qty In Stock: 0Brand: Crusader8.1 liter Heat Exchanger
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Universal Heat Exchanger | Seakamp 298633SK-298633Qty In Stock: 0Brand: Seakamp EngineeringAftermarket heat exchanger tank for Universal M-12 and early model M-20 marine engines. Learn More
Crusader 454 Heat Exchanger | Seakamp 97434SK-97434Qty In Stock: 0Brand: Seakamp EngineeringHigh-quality Seakamp replacement heat exchanger designed for early Crusader 454 marine engines with full system cooling.
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Universal Heat Exchanger | Seakamp 201027SK-201027Qty In Stock: 0Brand: Seakamp EngineeringAftermarket heat exchanger tank for Universal M35B and M25XPB model marine engines. Learn More© 2025 Marine Parts Source. All Rights Reserved.