Volvo Penta Sea Water Pump 21212799/3812519 for 4.3L 5.0L 5.7L Engines

Product Specifications

Compatible Models

Tired of Overheating Volvo Penta Engines? Get the Right Seawater Pump 21212799/3812519 for Your 4.3L 5.0L 5.7L Marine Engine

Marine engine overheating due to seawater pump failure causes immediate shutdown — costing operators $2,500–$6,000 per day in lost charter time or project delays. Counterfeit pumps fail within 200 operating hours, leaking saltwater into cooling systems and corroding heat exchangers. OEM replacements take 3–4 weeks to arrive from Sweden, halting vessel maintenance schedules. With over 120 engine variants across 4.3L, 5.0L, and 5.7L platforms, sourcing one reliable seawater pump for all configurations is a daily challenge for fleet technicians and marine repair shops.

OEM-Equivalent Quality, Ready to Ship

This Volvo Penta seawater pump meets original performance specifications while delivering faster availability and better value. Built by ISO 9001-certified factories with 10+ years’ experience supplying marine aftermarket components, each unit undergoes full-flow bench testing at 3.5 bar pressure and 45°C seawater simulation before shipment. Designed for continuous duty on workboats, fishing vessels, and luxury yachts, it supports critical cooling functions during extended dredging, harbor towing, or offshore survey operations — ensuring engine reliability where downtime is not an option.

Where This Part Works

This seawater pump operates under high-salinity, high-turbidity conditions typical in coastal ports, inland waterways, and tropical marinas. It circulates raw seawater through heat exchangers at flow rates up to 1,200 L/h under 3.2 bar system backpressure, resisting abrasive sediment and biofouling. Used extensively by port authorities maintaining tug fleets, commercial fishing operators running 12-hour shifts, and offshore support vessels operating in corrosive environments — correct part selection directly prevents catastrophic cylinder head warping or exhaust manifold cracking.

Engineering Details That Matter

The impeller is precision-machined from NBR-reinforced EPDM rubber with hardened stainless steel backing plate — ensuring consistent flow delivery and resistance to cavitation erosion at 3,200 rpm. The housing uses marine-grade A380 aluminum alloy with T6 heat treatment (HB 95–105), offering superior thermal conductivity and dimensional stability versus cast iron alternatives. Shaft seals are double-lip Viton® with spring-loaded PTFE-faced design, rated for 10,000+ hours in saltwater immersion. All mounting dimensions match OEM tolerances within ±0.05 mm, guaranteeing drop-in replacement without adapter plates or gasket modifications.

The Real Cost of Wrong Parts

A $120 counterfeit seawater pump may save $45 upfront but typically fails after 180–250 operating hours — triggering $1,800 in labor to replace damaged thermostats, cracked manifolds, and contaminated coolant. Saltwater ingress from seal failure leads to $3,500+ in heat exchanger refurbishment. Downtime penalties under vessel charter contracts often exceed $5,000/day. Our Volvo Penta 21212799 replacement delivers 2,800+ hours of verified service life under ISO 9906 Class 2 hydraulic efficiency testing — reducing total cost of ownership (TCO) by 41% over three years compared to low-cost alternatives.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in moisture-barrier pouch with VCI corrosion inhibitor and molded EPE foam insert inside reinforced export carton
• In-stock items ship within 2–5 working days after order confirmation
• Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight options available
• Real-time tracking number provided upon dispatch, updated until final delivery
• Minimum order quantity: 1 piece — supports urgent repairs and single-vessel maintenance

Get Your Volvo Penta Seawater Pump Now

Your engine can’t wait — every hour of delay increases risk of thermal damage and operational penalty. Send us your part number (21212799 or 3812519), vessel engine model (e.g., 5.7Gi-300-R), and required quantity — we’ll email a competitive quote within 24 hours. First-time customers may request a sample for bench testing before bulk order. Stock units ship from Guangzhou within 48 hours.

Frequently Asked Questions