Originally Posted by Westerly Pippin
I have a "new to me", 4 months ago, Volvo Penta 18 hp. It is fresh water cooled with a heat exchanger and anti-freeze circulation. I'm trying to determine if the "zinc plug" on the top front of the engine, about 7/8ish socket, should have a zinc? It doesn't have a fitting on the back. I have new shaft zinc and zinc on both twin keels. Any ideas?
Thanks for any help!
I have a Westerly Konsort Duo (the motor sailer model), with a VP2003 fresh water cooled engine.
The raw water cooled engine does have a zinc anode. It is at the forward end of the engine, where the pipe for the heat exchanger is fitted on the fresh water cooled engine. There is no zinc anode on the fresh water cooled engine.
I note that you say you have anodes on the bilge keels. If there is no connection to any electrical components on the boat, then the anode is not needed. You DO need an anode on the hull where the engine is connected to the fixing bolts within the hull - usually a pear shaped anode with the big lump facing forward - hydrodynamics. Also, it is prudent to have your shaft anode.
If your seawater pump is leaking, please ensure it is not from the weep-hole just behind the pump. If it is, then your water facing lip seal has failed. Between the water lip seal and the oil lip seal (each facing opposite each other) there should be an o-ring to spin off any leaking water from getting into the engine block.
If the water is coming out of the pump seal plate, you could try fitting a new paper seal before any major repair.
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Philip (Westerly moderator)