Westerbeke 9.0 BCG Technical Manual page 227

Service Bulletin Number: 171
Date:
Model:
Subject:
May 17,1988
All Gasoline and Diesel Generator Models
Raw Water Through-Hull Fitting
The raw water through-hull fitting used in the raw water supply to any Westerbeke Gasoline or Diesel
Model Generator
~
be of the Flush-Hull type and of no smaller inside diameter than the recommended
1.0. hose size for the inlet to the units raw water pump.
The use of high speed scoops or weedless scoop type raw water through-hull fittings is not approved or
recommended. These types of raw water through-hull fittings tend to encourage raw water siphoning
through the sea water circuit when the vessel is under way and the generator not in operation. This type
of siphoning can fill the units exhaust system with raw water and enter the engine cylinders through the
exhaust manifold and open cylinder valves, causing eventual damage to the engine. Raw water entry
into the cylinders of the engine, whether resulting in damage or not, is not considered a warrantable
problem but rather a fault in the installation, the responsibility of the installer.
Westerbeke presumes the marine installer to have as basic knowledge of the requirements and
safeguards needed in the installation and plumbing of the raw water supply and exhaust system of a
marine generator unit.
221 Westerbeke Generators