When I first bought Windstar, I had a terrible, intermittent BANG - BANG -
BANG in fwd only.  To address, I consulted a local yard, to whom I paid
many many boat bucks to:

1)  Replace the very worn martec prop with a folding Gori.
2)  Replace tired (one cracked) motor mounts
3)  Replace shaft and cutlass bearing.
4)  Resecure strut.

This did not solve the problem.   (They kept the money.)    I finally
figured out that it was the transmission slipping.   (basically a conical
male bronze hub mates with a corresponding female steel hub to engage the
engine.  when the surfaces glaze over time the necessary friction is
reduced and the mating surfaces slip.  Bang bang bang.

The fix took one afternoon, around $30 worth of materials.  I had the
transmission out, apart, surfaces lapped to deglaze, reassembled and
reinstalled back in the boat.  No issue since.

Dave









--------- Forwarded message ----------
From: John Irvin <skis...@outlook.com>
To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com>
Cc:
Bcc:
Date: Tue, 16 Jun 2020 13:15:26 +0000
Subject: Re: Stus-List strange noise
Adjustable prop with sticking blade?

Sent from my iPhone

On Jun 16, 2020, at 9:02 AM, Bill Coleman via CnC-List <
cnc-list@cnc-list.com> wrote:



That’s a good suggestion.  Also, the strut – but if it was shaking that
much, you would probably have water too!

My  rope cutter was making sounds last summer, with a missing bolt.



Bill Coleman

Erie PA



Maybe a loose shaft anode



On Tue, Jun 16, 2020 at 8:27 AM Robert Boyer via CnC-List <
cnc-list@cnc-list.com> wrote:

Maybe a failed motor mount?

Bob

Bob Boyer
s/v Rainy Days
C&C Landfall 38 (Hull # 230)
(Spending winters in the Bahamas, summers in Baltimore, and somewhere on
the ICW in between)
blog: dainyrays.blogspot.com
email: dainyr...@icloud.com

> On Jun 15, 2020, at 11:44 PM, Doug Mountjoy via CnC-List <
cnc-list@cnc-list.com> wrote:
>
> 
> HI All,
> The other day while motoring at about 6.5kts we noticed an intermittent
thumping near the stern. It sounded like a crab float was bouncing off of
the hull. we slowed and the noise became quieter. Thinking there was
actually something thumping on the hull we came to a complete stop and even
backed up some, no help. We spent the weekend anchored in Liberty Bay. on
the way home the same noise, I looked at the rudder quadrant and could not
see anything. Upon arrival back at my slip I dove on the boat and could not
see anything unusual.
> Any ideas would be greatly appreciated.
> Thanks in advance
>
> Doug
>
> --
> Douglas Mountjoy
> 253-208-1412
> Port Orchard YC, WA
> Rebecca Leah
> C&C LandFall 39
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