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CANT GO ASTERN !

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cjm View Drop Down
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    Posted: 28 September 2015 at 12:39
I have a 301 with the Volvo MD2020. Went to the marina yesterday , engine starts fine.Ran it in neutral for a few minutes , in reverse, and plenty of churn in the water at the stern.Put it in reverse gear and the power disappears.Does not go astern and the churn disappears. 

 It is very curious. The engine starts fine and can be revved both forward and backward when in neutral. It will move forward but when putting it into reverse gear nothing happens and the wake at the stern disappears ( or is significantly reduced).

 Put it into reverse but in neutral and the water is churning up at the stern , as it should.

 I am hoping this is just the control cable or something else which is easily adjusted and not a big problem with the saildrive etc . The control lever doesn’t feel right – there seems to be a lot of play in it and it doesn’t seem to engage or clunk like it used to.

 The control cable is however moving the selector lever on top of the engine – visible from the access hatch in the aft berth.

Anybody else had a similar problem - I just cant understand how the prop is clearly doing it s job in reverse when in neutral but not when actually in reverse gear.

Many thanks.

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samuel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 28 September 2015 at 12:46
It should not be churning water when in neutral, or forward, whatever the revs.
The prop should stay still or just rotate gently with possibly slight friction on the drive.
Has your drive selector slipped on the shaft
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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holby View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote holby Quote  Post ReplyReply Direct Link To This Post Posted: 28 September 2015 at 13:10
I'm with Samuel, on this when in neutral there should be no churning of water, even when revs increased with gear disengaged.... It should only churn water when in gear and revs increased from the neutral position.
Again I would have to agree with Samuel that it could poss. be the selector .
If you want to check, put your 301 on a concrete wash pad, ( the reason is that you will then have firm footing) wait for the tide to drop and before it drops past to far down the sail drive get some body to start the engine and with you standing in the water clear of the prop watch to see what happens to prop in the water when in neutral, forwad and reverse, when in neutral and with revs...
It's easy if on a concrete pad to dry and settle a 301, also possible on a drying harbour wall but you may not have a firm footing for yourself when watching the the prop.
Hanse 301, tiller steering, Volvo 2010 (10hp)
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cjm View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cjm Quote  Post ReplyReply Direct Link To This Post Posted: 28 September 2015 at 15:42
Many thanks for the very prompt and helpful reply.That seems like a sensible diagnosis - I just couldn't figure out why it was churning water in neutral but not in gear.
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cjm View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cjm Quote  Post ReplyReply Direct Link To This Post Posted: 28 September 2015 at 15:43
Many thanks for the very helpful reply.Sounds like a job for the hoist dock.....
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Rock View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rock Quote  Post ReplyReply Direct Link To This Post Posted: 28 September 2015 at 21:36
CJM, before you lift the boat I would try adjusting the morse cable, this sounds very much like the fixing screws holding the cable loosened and the gear selector now being in a slightly wrong position.
Adjusting happens on the engine side, but I think I remember (from the Volvo on my previous boat) that the cables can also be adjust on the side of the morse handle (depending on the type of handle)
Peter
Hanse 400e "M-square2" #0241
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samuel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2015 at 07:11
Why not disconnect the cable & move the lever by hand then you can see where neutral , reverse & forward is now. Set the cockpit lever to neutral & re fastens the gearbox arm to align with the same point on the cable & re fasten the arm
If it is loose you will be able see that better when disconnected. You will also be able to feel for any untoward clicks or interference when you move it to determine if there is a gear slipping within the saildrive

One final point is the propeller. Mine has a rubber bush between outer part holding the blades & the part that fits the shaft. This is designed to break in the event of serious damage & to absorb shock when changing gear. My one has to be serviced & replaced every 5-6 years or so depending on use.
Otherwise it will slip & the blades will not rotate so much- I have a Brunton autoprop


Edited by samuel - 29 September 2015 at 07:17
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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cjm View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cjm Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2015 at 09:26
Many thanks chaps.As a relative newcomer to this forum I am hugely impressed by the prompt and helpful responses.Much appreciated.
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