Sea intake becomes ineffective at high revs

[NYSail]

After you check the hoses leading to the pump don’t forget about the mixing elbow..... not familiar with the engine, however if you have buildup in the mixing elbow it will restrict flow....... when you say doesn’t work do you mean as no water of not sufficient water??

As was said..... it’s there for you to find!

[dmalcol1]

Only have time for short response sorry
If the engine seems to be struggling there may be exhust retriction referred to as back pressure. Not the most likely thing to happen but a remote plausibility.

[mhobbs]

Thanks again to everybody who has responded. Let's leave it there for now: I have plenty to check!

Wishing you all the best for 2020.

Michael

[sailah]

2 other areas I have had issues with reducing flow while you are checking:

My RW pump has a bronze elbow directly on pump that feeds to my heat exchanger. Found (4!!) impeller blades lodged in that 90 degree elbow while rebuilding pump this spring. Amazed I was getting flow. Also chuckled that I was never finding them in the heat exchanger

Also, at the heat exchanger inlet, on the RW side, salt was precipitating out and necking down the inlet. Was 1" hose and probably 75% blocked. Scraped out with pocket knife. I have to do this every 2 years as maintenance.

[Cadence]

Originally Posted by mhobbs

Thanks again to everybody who has responded. Let's leave it there for now: I have plenty to check!

Wishing you all the best for 2020.

Michael

Happy New Year and thanks for the leave it there.