Does the banging happen only while underway? Can you duplicate it while reving the engine in neutral at the dock? If so consider that the stringer the engine mounts to may be seperating from the hull. Also might want to have the shaft aligned. These happend to Lyric with the old Albin engine. I noted the seperation when I replaced the stringers during the Yanmar installation.
Walt
To:
AlbinVega@yahoogroups.com
From: nwalsh@...
Date: Tue, 28 Jun 2011 11:50:57 -0400
Subject: Re: [AlbinVega] Re: funny noise..
Rope around the shaft, maybe. First place I'd look.
Nicholas H. Walsh P.A.
111 Commercial St.
Portland ME 04101
207/772-2191
Fax 207/774-3940
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From: Peter
Sent: Tuesday, June 28, 2011 11:46 AM
To:
AlbinVega@yahoogroups.com
Subject: [AlbinVega] Re: funny noise..
Another thought, GH ...
What kind of exhaust system do you have? Is it an original 'dry' exhaust, with the long straight tube running aft? This system has an inner copper tube for the exhaust and an outer rubber one for the ejected cooling water. (There are spacers inside to keep the copper centered in the rubber.) It runs down the starboard side of the area under the cockpit floor.
A view at the engine where gasses and cooling water are injected into the tubes.
An overall view:
A view at the stern, where the water comes out of the outer tube and is routed to the transom outlet.
The exhaust gases go down the inner tube and the exhaust water is injected into the outer one, and the two meet near the transom, where gases and liquid are combined and exhausted from the boat through an inverted "U" shaped copper riser.
The more common system used these days combines gasses and cooling water just aft of the engine.
Anyway, when I bought Sin Tacha the original system was in place, but the inner copper tube had split in several places and the gases and water were all churning around in both the inner and outer tubes, making a pop-pop-popping sound. I converted to a Vetus waterlock muffler system.
Peter
#1331 'Sin Tacha', #1085 Albin Ballad 'Bennath'
