Can you supply me with a fresh cooling water pump for a 1990 Isuzuboat engine. The engine is a 6BD1 Serial number 518499 which is a 6 cylinder diesel non turbo charged. Its is truck engine which was installed in a 1990 Albin Sport Cruiser 27 foot boat. The pump is installed on the front of the engine and normally would have a fan attached to the water pump pulley, but, of course there is no fan as the engine has a heat exchanger which transfers heat from the engines fresh water cooling system to the salt water cooled heat exchanger.