How do you test a raw water pump?
Hook up the fake-a-lake, disconnect the water line to the raw water pump. Make sure water goes through there. Hook the line back up, disconnect from the trans cooler, make sure water comes out there. You should have seen a bit more pressure coming from the output of the raw water pump.
When should I replace my raw water pump?
If you do it every spring, or every time you run it dry for more than a 30-45 second period, or under restricted flow due to a blockage in the strainer or intake system, you should have a trouble free impeller and never throw a blade or lose flow due to a worn impeller again.
What is a raw water pump on a boat?
Raw-water pump This pump does the bulk of the engine’s cooling. It draws raw water (this may be seawater, fresh water or whatever mixture of the two the boat is floating in) into the engine’s open or raw-water cooling circuit using a rubber impeller. The impeller and its weaknesses are well understood.
How often should you replace the raw water pump in your boat?
It’s probably a good idea to do it every two years. If you try to stretch it to three, they will take a set during lay-up and will probably start throwing vanes. If you lay-up, then I’d remove and bag them for the winter. If it is more trouble to remove them than its worth, definitely replace every 2 years.
How does a raw water pump work?
In a raw water system the water is drawn up through the seacock by the water pump. The water flows through the engine and directly out the exhaust. This cooler water absorbs heat from the engine to help keep it cool. Most newer marine engines use an enclosed cooling system.
What kind of impeller does a Volvo Penta MD2020 engine use?
Excellent quality impeller kits and pump service kits for the original engine driven raw water pump for Volvo Penta MD2020 engine. Our impellers are manufactured from the correct grade of high quality neoprene rubber and are molded on to a machined brass coupling with a stainless steel drive pin.
What is the early impeller kit for Volvo Penta?
The ‘ early impeller kit ‘ fits Volvo Penta MD2020A & MD2020B (up to serial no. 51012030076) with 9.5mm diameter shaft and includes the impeller, a tube of glycerine lubricant, an end-plate gasket and full fitting instructions.
What is included in the raw water pump late rebuild kit?
The Raw water pump ‘ late rebuild Kit ‘ includes the ‘Late service kit’ plus an additional nitrile rubber shaft seal (with stainless spring), end cover and two drive shaft bearings. Anyone operating in the marine environment will know the importance of a keeping a spare impeller in the boat toolbox! UK delivery is by 1st class Royal Mail.
