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post #1 of Old 02-24-2007 Thread Starter
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3JH2 Yanmar Impeller

1997 hull #20 PS32PH with a 3JH2 series Yanmar 3 cylinder diesel.

How do you get access to change the impeller on this model engine? It appears that the alternator will have to be removed and it has been reported that the wiring to the alternator does not allow it to be moved any great distance. The impeller cover faces aft with 4 screws that need to be removed to allow impeller inspection "with a mirror, or maybe a digital camera", or for replacement. I like the direct drive feature of the impeller pump but it appears that maintenance is going to be rather difficult. Has anyone else maintained this with this model Yanmar engine?

Rick #20
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