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Blocked sea water intake for VP sail drive

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mattplowman View Drop Down
Lieutenant
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Joined: 05 December 2017
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Points: 23
Post Options Post Options   Thanks (0) Thanks(0)   Quote mattplowman Quote  Post ReplyReply Direct Link To This Post Posted: 28 January 2019 at 19:36
I have managed to fix the issue , partially by using the dinghy pump to clear the blockage enough to get us home and then last night I used the hose at the marina to force water back through the seacock , ran it for about 30 sec and it has completely cleared the blockage , we are back to peak exhaust flow.
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Fifth baby View Drop Down
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Joined: 08 April 2015
Location: Spikkestad, Nor
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fifth baby Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2019 at 15:12
I have read this thread with great interest.  I have had a challenge for some time with, in my opinion to low flow of cooling water through the VP saildrive.  I have experienced air bubbles in the hose after the seawater filter.  I fear that there is a blockage in the SD that creates too high vacuum/underpressure resulting in air being sucked in through hose connections on the seawater filter.  There are no air in the hose from SD to the filter.  For at least two occasions I have completely lost cooling after several hours of sailing.  I have now purchased parts for installing an extra seawater inlet, but struggle a bit to find a suitable place for installing the valve.  I have a Hanse 385 with D1-30 engine.
I will try the tip with the dingy pump and run pressurized freshwater down in the SD before I make a new hole through the hull
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