Albin 05-01-040 Raw Water Cooling Pump, 2-Groove V-Belt Pulley

If you're running a Volvo Penta gas engine, the raw water pump is the part that keeps everything else alive. This is the Albin 05-01-040, a genuine self-priming replacement pump with a 2-groove V-belt pulley, built to bolt straight onto the 4.3, 5.0 and 5.7 blocks and their GL versions. When your old pump starts weeping at the housing or the impeller can't move enough water to hold temperature, this is the fix.

Albin has been building marine pumps for well over a century, and this one is a flexible impeller design. Self-priming means that once the cooling system is charged, the pump pulls water on its own. You're not fighting an airlock every spring when you splash the boat. The 2-groove pulley drives off the crank, and that second groove spreads the load so the belt runs cooler and lasts longer on the higher-output small blocks.

This pump fits the 4.3L V6 and the 5.0L and 5.7L V8 Volvo Penta gas engines, plus the 4.3GL, 5.0GL and 5.7GL variants. Think express cruisers, bowriders, and older sterndrive runabouts, anything with a raw-water-cooled Volvo gas engine turning a dual-belt pulley. If your engine uses that 2-groove arrangement, this is the pump that matches it. If you've got a single-groove pulley or a closed freshwater cooling system, check your setup first, because those use a different pump.

How do you know the pump's done? It's usually one of a few tells. The temp gauge climbs on plane and settles back at idle. The telltale goes weak or just dribbles. You spot a salty crust around the pump housing, or a slow drip onto the bilge under the front of the engine. Sometimes the impeller lets go and you find rubber chunks down in the exhaust elbow. Any of those, and it's time. Running an overheating gas engine even for a few minutes can cook the exhaust manifolds and warp a head, so this isn't a part to nurse through one more season.

Swapping one of these is a weekend job for most owners. You'll pull the belt, unbolt the old pump, transfer or replace your fittings, and set the new one in place. A couple of tips from the dock: put fresh thread sealant on the mounting bolts going into the Volvo block, and set belt tension so it flexes about half an inch at the midpoint of the span. Too tight and you're loading the bearings and the crank pulley. Too loose and it'll squeal and slip under load. Once it's on, run the engine and watch the telltale. You want a steady stream and a stable temp gauge before you leave the dock.

Raw water is hard on any pump. Sand, silt, shells, and weed all get pulled through, and they chew up an impeller fast. Run a good raw water strainer ahead of the pump and check it often, especially if you run skinny water or a busy inlet. At the end of the season, pull the impeller cover, inspect the vanes, and keep a spare impeller aboard. Do that and this pump will give you years of quiet, dependable cooling.

One more thing worth saying: this is the complete Albin pump assembly, not just a repair kit. It shows up ready to bolt on with the impeller already installed, so you're not sourcing a separate cover, gasket, or impeller to finish the job. For a raw-water-cooled engine, replacing the whole pump at the first sign of trouble is cheaper insurance than a scored shaft or a seized bearing taking out your season.

It's a genuine Albin pump, made in the USA to ISO 9001 standards, and it's backed by a 2-year limited warranty. Not sure it's the right pump for your engine? Send us your Volvo Penta model and serial number and we'll confirm the fit before you order.