Description:
PP-119775-33000 Yanmar Oil Cooler Assembly
The PP-119775-33000 Yanmar Oil Cooler Assembly is a marine grade lube oil cooler designed specifically for Yanmar 6LP and 6LPA series high speed marine diesel engines. It plays a critical role in maintaining stable oil temperatures during sustained high RPM operation and heavy load conditions typical of planning hull and commercial vessels.
This unit is a 4" × 11" copper nickel (CuNi) shell and tube oil cooler, where engine oil is circulated through an internal core while raw water flows around the exterior shell. Heat is efficiently transferred away from the oil, preserving correct viscosity and preventing thermal breakdown that can lead to bearing wear, piston scuffing, and turbocharger damage.
Copper nickel construction provides excellent resistance to corrosion, dezincification, and scaling in saltwater environments. The cooler is protected by service replaceable sacrificial zinc anodes, which form part of routine maintenance and significantly extend service life.
Manufactured to OEM dimensional, mounting, and flow specifications, the 119775 33000 is a direct fit replacement requiring no modification to brackets, hose routing, or engine plumbing. It is commonly replaced during major services, repowers, or when internal blockage or corrosion reduces oil cooling efficiency.
Widely used across both mechanical and electronically controlled 6LP / 6LPA engine variants, this oil cooler is a proven and reliable solution
Suits Yanmar:
• 6LP ST
• 6LP STE
• 6LP STZE / STZE1
• 6LPA STP2
• 6LPA STZP2
• 6LPA STZP3
• 6LP & 6LPA Series marine diesel engines (LP series lubrication systems)
Replaces / Supersedes:
• Yanmar: 119775-33000
• Direct interchange with all LP series oil cooler assemblies using the 4" × 11" configuration