Fitting a new raw water pump on a Volvo Penta D1-30B

Another in our series about maintaining a small marine diesel engine. In this video, an engine overheat alarm sounds when we are at sea and we need to identify the fault and get home.
Once in the safety of Weymouth Marina we replace our failed raw water pump.
00:00 Breakdown at sea
01:44 NASA EX-1 Exhaust alarm
03:20 Fault finding the raw water cooling system
04:33 A 'get you home' workaround repair
05:53 Fitting a new pump
07:47 and we are up and working once again

[@Mr_G_in_Alba]

Great series, very educational for novices like myself. Thanks for posting them 👍

[@confidencesailing]

Thank you for watching then

[@biopontes]

Excelent!!!

[@nathanlohrmann]

Really appreciate your videos. Just the right amount of detail to facilitate overall understanding and enable the fix - real confidence-builders. Thanks.

[@confidencesailing]

Thanks for the comment, and thanks for watching.

[@dogbone6315]

Nice vid. Came here looking for info on my seawater strainer. It looks awfully small. After watching the vid, I also believe it was added later. It is below the water line and it’s like the prev owner cut the hose and stuck it in. On other diesel boats I had, it was always above the water line. It also looks tiny. I’ll be getting the actual Volvo Penta seawater strainer.

Good work & vid. I now try to stop the oil leak where front pump flange meets the cover, there is a o-ring to seal the oil. I got the o-rig from Volvo dealer as 68x3 mm size but the one on the video seem to me bit thicker maybe 5 mm dia instead of 3mm ? Do you know the size I guess you also replaced that o-ring with the new pump? Thanks

[@nathanlohrmann]

Just replaced my raw water pump thanks to your video 🤙🏻 However, I now hear an intermittent “mrrp” sound as can be heard in the below video, and I get a light “whirring” noise as can also be heard when it runs. Any sense for what this might be and whether it requires attention? I should add that the new pump came with an o-ring that goes between the pump and the engine. The old pump didn’t have one. I wonder whether this has changed how the gears mesh and that that is the cause of the noise. kzbin.info/www/bejne/aXycY3hnhM14nsUsi=c4VzQ9IXSiP6YPPG