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Volvo D2-55 drive problem

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charentebob View Drop Down
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Joined: 09 April 2014
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Post Options Post Options   Thanks (0) Thanks(0)   Quote charentebob Quote  Post ReplyReply Direct Link To This Post Topic: Volvo D2-55 drive problem
    Posted: 05 July 2017 at 08:15
I wonder if I could prevail on you for some advice about a problem I've got
with my 2013 engine that has now done just over 1000 hrs.

With increasing regularity when I select either forward or reverse although
the folding prop opens on tick-over revs I don't get full power with higher
revs. Eventually with repeated returns to neutral it kicks-in but obviously
there is something wrong. I went over the side to check that the prop is
opening & closing under power & it does. These symptoms first occurred last
July & I had an engineer on board who diagnosed the problem as
adjustment of the morse cable. He did this & the problem went away for a while but
re-occurred occasionally. The engine had done 750 hrs at this point. As until
recently this was an occasional problem I have not pursued the matter.

I checked the oil level in the sail-drive & have found that it is overfilled. The manual
states that this should never be over-filled.

Any suggestion as the the cause & what might be needed to solve it would
be appreciated.
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hawkeye View Drop Down
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Joined: 03 December 2006
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hawkeye Quote  Post ReplyReply Direct Link To This Post Posted: 05 July 2017 at 08:26
Sounds like the cone clutch to me. Probably glazed and needs lapping.
This is a chronic issue with some of the Yanmar engines - about every 500 hours! Cry
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kipwrite View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kipwrite Quote  Post ReplyReply Direct Link To This Post Posted: 05 July 2017 at 11:21
Overfilling suggest a leaking seal behind the prop. Just had a seal replaced on my D2-75 with 380 hours. Sail drive oil was slightly off color. Make sure you check the level when engine is cold.
Kipwrite
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High Time View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote High Time Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2017 at 16:41
You could have a partial restriction in the fuel supply. 

When were both primary and secondary filters changed and was any debris evident, particularly in the one nearest the fuel tank? 

If you have a diesel fired cabin heater fitted, debris from the hole cut in the fuel tank for the fuel feed can often be left in the tank. This can then get sucked up the engine feed pipe, partially blocking the feed and stopping full power being achieved. 
Roger

High Time (415 #038)
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