Originally Posted by jackj17
I am in exactly the same situation as you are but a year ago. If there is good water
flow from the xhaust I would leave the impeller (Idid) and checked it every time I went out. Now before this season it willbe replaced.
My fuel was in question so I removed as much as I could with a vacuum pump and filled up with fresh fuel and a bacteria killer. Then I inspected the primary filter it was slightly contaminated but well within limits so I left it alone not wanting to risk air in the system. Oil
I vacuumed it out and replaced it with Shell Rotella the filter with an aftermarket unit. I too am mechanical but never had anything to do with a diesel
I had a trouble free season I am on the hard
now and my little beauty is getting full treatment per the Yanmar
Hope you are successful
Leaving the impeller is not a good idea. They still pump water when they are coming apart & you end up with little bits of the blades in your cooling
system. If there is an oil cooler they usually end up there. If not they'll be plugging up your heat exchanger
Also, it is not necessary to empty the fuel tanks
. Diesel is not like gas in that it does not go bad over time. It can become contaminated with bacteria due to water accumulation from condensation
but your filters will take care of that. Pumping the tank dry will still leave the crap at the bottom. However, if you have inspection
plates with good access it would be worthwhile to remove all of the fuel & clean the tanks
but do not throw the fuel away. Use a Baja
or similar filter & pour it back in when you are done.
You can send a sample of your oil off for analysis which can help diagnose the condition of your engine.