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Forum: Engines and Propulsion Systems

20-01-2018, 18:05

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

Most people protect their raw water system with a strainer in between the seacock and pump. That does figure into the equation along with it's placement.

Forum: Engines and Propulsion Systems

20-01-2018, 17:58

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

Thank you for you opinion, not sure why you are yelling.

With 6000 hours cumulative across 3 engines, I take the risk!

Forum: Engines and Propulsion Systems

20-01-2018, 17:39

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

Since the water lift muffler is way below the siphon break, there normally isn't any water between the siphon break and the muffler (that's the purpose of the break), hence the pump has to get the...

Forum: Engines and Propulsion Systems

20-01-2018, 17:07

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

Thanks for you suggestion!

A siphon break 3 feet above the pump is 3 feet of head.

Forum: Engines and Propulsion Systems

20-01-2018, 16:31

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

Post #2 & #3.

Forum: Engines and Propulsion Systems

20-01-2018, 16:19

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

There is a strainer between the seacock and pump, normally above the waterline. Depending on the head caused by the siphon break, a worn pump may not prime without assistance.

Forum: Engines and Propulsion Systems

19-01-2018, 09:27

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

It's more important if the strainer is above or below the waterline. Water nor air usually flow freely thru an impeller pump.

Forum: Engines and Propulsion Systems

18-01-2018, 15:52

Replies: 70

Burned up new raw water impeller

Views: 14,665

Posted By DotDun

Re: Burned up new raw water impeller

Did you open the seawater cock after installing the impeller?

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