Description:
PP-4989987CN Cummins 4989987CN / 3349370CN Fuel Cooler
This Seakamp Fuel Cooler is a marine-grade replacement designed for Cummins marine diesel engines used in commercial fishing vessels, workboats, sport-fishers and pleasure craft, most commonly fitted to the QSM11 family. The unit has a 4"X17" core. It also replaces Cummins part #3349370CN.
Modern common-rail and high-pressure diesel injection systems return excess fuel to the tank at elevated temperature. The fuel cooler routes that return fuel through a tube-and-shell core where raw water carries the heat away, preventing fuel-tank temperature build-up and protecting injector clearance, lift-pump performance and overall fuel-system reliability.
Sustained high return-fuel temperature can degrade fuel-tank seals, raise injector clearance, reduce engine power and trigger overheat protection. A correctly functioning fuel cooler protects injector longevity, supports rated power output and prevents derating in extended high-load operation.
Manufactured to match OEM dimensions, port orientation and mounting geometry, the 4989987CN is a true direct-fit replacement for the original Cummins component. It installs without modification to existing hoses, brackets or pipework, making it suitable for planned maintenance, corrosion replacement or preventative servicing. The copper-nickel (CuNi) tube bundle gives superior resistance to seawater corrosion and electrolytic attack compared to standard copper, extending service life in tropical or high-chloride water.
Suits Cummins:
• Cummins QSM11
• Other Cummins applications using this Seakamp form factor
Replaces / Interchangeable With:
• Cummins: 4989987CN
• Cummins: 3349370CN
• 4989987 (copper variant of same part)
• 3349370