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Old 17-06-2013, 02:13   #1
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Join Date: Jun 2013
Location: Istanbul
Boat: oceanis 343
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Yanmar 3YM30 Raw Water Pump Belt Change


This is my first post at the forum. I am from Istanbul and had been following the forum without registration; and now I am here. Two months ago I owned an 2005 oceanis 343. She has a yanmar 3ym30 engine. When I inspected the engine I realised that there are black rubber particles coming from the water pump">raw water pump belt which is loose. So, is there a way for adjusting the belt tension and how can I change the belt with a new one.

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Old 17-06-2013, 05:20   #2
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Join Date: Jun 2012
Location: Annapolis
Boat: Hylas 44
Posts: 403
Re: Yanmar 3YM30 Raw Water Pump Belt Change

If there are particles coming off it it needs to be replaced. The adjustment is usually made by moving the alternator. You can probalby find the manual at
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3ym30, water, yanmar

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