YRANZO Crank-Mounted Sea Water Pump for Volvo Penta 4.3/5.0/5.7 – Pre-2005 Direct-Fit with Serpentine Pulley

YRANZO's crank-mounted raw water pump delivers a direct-fit replacement for select Volvo Penta V6 and V8 engines, including 4.3, 5.0 and 5.7 models, and comes pre-assembled with a serpentine-belt pulley.

If your marine cooling system needs a dependable replacement component, this pump offers an economical aftermarket option engineered to match the mounting and belt-drive arrangement of older Volvo Penta installations (pre-2005). It replaces OEM part numbers 21214599, 3812693 and 3862482 and is supplied ready to bolt onto the crankshaft with the pulley already fitted. The unit is intended for raw (sea) water circulation and is packaged as a single complete pump assembly.

Which Volvo Penta engines are compatible with this crank-mounted sea water pump?

This pump is designed for V6 and V8 Volvo Penta gasoline engines in the 4.3, 5.0 and 5.7 liter families manufactured before 2005. It follows the crank-mounted layout and serpentine pulley style used on those models, so it fits applications that originally used the listed OEM part numbers.

• Direct fit for 4.3L, 5.0L and 5.7L V6/V8 engines (pre-2005)
• Matches mounting and belt arrangement of the original crank-mounted pump
• Replaces Volvo Penta part numbers: 21214599, 3812693, 3862482

How do I confirm this pump is the right replacement for my boat?

Before ordering, compare your current pump's mounting location, pulley type and part number to the information provided. Look for a crank-mounted unit with a serpentine-style pulley and verify any stamped or cast OEM numbers match one of the replaced references.

• Check your old pump for 21214599, 3812693 or 3862482 markings
• Confirm the pump mounts to the crankshaft and uses a serpentine belt
• Not compatible with 3.0L 4-cylinder Volvo Penta engines

What does the package include and what should I expect at installation?

The product ships as a single raw water pump assembly complete with the serpentine belt pulley installed, ready for mechanical mounting. You should have basic mechanical tools, seals/gaskets and, if needed, belt routing diagrams or shop manuals for torque specifications and alignment checks.

• One raw water (sea) pump with serpentine belt pulley pre-installed
• Expect to replace gaskets or O-rings during installation (not always included)
• Follow engine torque specs and belt tension procedures for proper fit

What performance and durability considerations should I keep in mind?

This aftermarket assembly is built to function like the original crank-mounted pump, circulating raw water through the engine cooling passages. As with any sea-water-exposed part, periodic inspection for corrosion, pitting or impeller wear is recommended to maintain reliable cooling performance.

• Designed for raw seawater circulation in compatible Volvo Penta engines
• Periodic checks of impeller and pulley condition are recommended
• Replace if signs of corrosion, leakage or reduced flow appear

Who is this for: This YRANZO pump is aimed at boat owners, marine mechanics and fleet operators running pre-2005 Volvo Penta 4.3, 5.0 or 5.7 V6/V8 gasoline engines who need a direct-fit crank-mounted raw water pump replacement. It is not intended for 3.0L 4-cylinder units; if you are unsure about fitment, inspect your existing pump for the OEM numbers listed here or contact a marine technician for verification before purchase.