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Kadey Krogen 44 Trawler Training At The Helm

Loopers Move Up to a Nordic Tug 37

True North 38 - Delivery to the Abacos

Kadey Krogen 48 North Sea AE, Advanced Ergonomics

Cruising 101- FUNdamentals with Captain Chris! March 2017

A Looper Learns About the Florida Coast

Georgia Tech Alum Starts the LOOP Trawler Training aboard a Krogen Express 52

TrawlerPort at Fort Lauderdale International Boat Show

Impeller Trouble Shooting

The Fifth of Seven Boating Systems Tips
Captain Chris Yacht Services
Impeller Trouble Shooting
Ruh-Roh! This impeller is missing a few vanes. We must find and remove them to allow the water to flow with ease as it cools all the engine components.
The raw water pump on your marine engine uses a rubber vane impeller as a self priming pump. The impeller pushes the water through the system to cool the engine components including the antifreeze/internal coolant, the oil, exhaust manifold and hoses to name a few items. On a propulsion engine there are even more items to keep cool.

In this video we are inspecting the raw water pump impeller itself after we noticed steam and a low water flow from the side exhaust on our boat. If you haven't viewed the previous post check it out.

If the water flow is restricted by trapped debris in the strainer it can run dry, overheat and the vanes will break off further reducing or stopping water flow.

To solve this dilemma we inspected the rubber impeller. We notice quickly that it is missing vanes which are stopping the water flow. Not only is it important to remove and replace a damaged impeller but it is also essential to locate and remove all the missing vanes.

Watch carefully to see how we spy some broken vanes upstream in the pump inlet and downstream in the discharge.

Our next post will show a leaking vented loop dripping water onto the electrical generator. Uh-oh! This is a problem waiting to happen. 


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