Join Date: Feb 2000
Location: Annapolis, Md
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Re: Doing my first oil change/fuel filter change on Yanmar (YSB8)
I would probably replace the fuel filter first and do that while the engine is cool just because it is much nicer to work on a cool engine. My procedure is to shut off the fuel line at the tank. I typically do the Racor filter first simply because its less messy that way on my particular boat. Then I pull the engine mounted filter. I have an ancient little basting bulb syringe that I use to fill the cartridge compartments through the bleed screw holes. Then I open the fuel line, close the water intake, and bleed the engine. Once that is done I start the engine and kill it as soon as it starts, open the water intake, restart the engine to look for fuel leaks, and then move onto the lube oil system.
Before changing the lube oil, I typically run the engine for somewhere between a quarter to a half hour to make sure that the oil is warm and that any fine material or moisture is in suspension. I then pump out all of the old oil that I can as quickly as I can. I then remove the old lube oil filter. (My favorite trick is to make a catch basin out of an old gallon milk jug bottom and place that under the fuel filter before and during the time that I am removing it, and dump the filter into the catch basin while I am working simply as a way of containing the mess.) I then install the new oil filter. I like to let the engine sit maybe 20 minutes (including the time to remove and reinstall the filter) then do a final pump out of whatever lube oil has seeped down from the upper engine in the meantime. The last steps are to refill the oil, run the engine for a few minutes looking for leaks and circulating the oil through the filter, and then shut the engine down and check the dipstick again. The oil filter uses maybe half a cup of oil so I typically need to add a little more oil after that.
Lastly, I check the belts and hoses, and the shift linkage and fuel cut off cable adjustments while I am there, and I put a description of what was done, date, and engine hours in my logbook. By that time it is usually time for lunch.
That's about it,
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Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay
Last edited by Jeff_H; 07-19-2019 at 01:28 PM.