www.iFourWinns.com

It's a Volvo Penta 3.0L

The boat was running fantastic in the last few days. I had been keeping it below 4,000 RPM and really trying to be easy on it. The temp gauge was steady at 150-160, and the oil pressure was steady at 40 when running.

Yesterday, this screeching/grinding sound started and you can hear that in the video.

And I noticed that the oil pressure is down to 20-30, and it seems like the engine is heating up to 150 much faster.

So I'm wondering if more engine cleaner will fix this or if it's a more serious problem.

Here's the video with the sound

https://imgur.com/a/ntexDIH

Sounds more like a belt or bearing noise to me….raw water pump could be on its way out which *could * explain the temp…..maybe mist the belts with a water bottle while running to see if tone of screech will change.

_________________
Jon Miller
1998 four Winns Horizon H200
Volvo Penta 4.3 GL
Newtown, CT

untitled-545 by millerjont, on Flickr

Take off the SERP belt and spin the alt, front circ pump and impeller as well as p/s pump. See if the bearings feel rough in any of the accessories.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II