I recently changed my oil on a Yanmar 3HM and needed to get a new extractor pump. Instead of just getting a replacement pump, I got a vacuum Oil Extractor such as you can get a west marine - the pump pumps out air from the enclosed container which then sucks up oil from the dip stick. The oil doesn't mess up the pump and when done and you pull out the hose from the dipstick and suck up some more and the hose is clean as well - wish I knew about this 40 years ago.
I was also changing my primary and secondary fuel filters and was wondering how to get fuel into them and bleed them. Could use the teany tiny primer pump on the yanmar, but that would have taken me a long time. I saw that some have installed an outboard motor priming bulb, but some advise against that because of failures.
It then occured to me that I had a nice vacuum pump and jammed the small hose into the bleed screw hole on the secondary and sucked out the air. I then finished off with a few pump of the primer pump. - it went very quick - just a couple of minutes and made no mess.
I was also changing my primary and secondary fuel filters and was wondering how to get fuel into them and bleed them. Could use the teany tiny primer pump on the yanmar, but that would have taken me a long time. I saw that some have installed an outboard motor priming bulb, but some advise against that because of failures.
It then occured to me that I had a nice vacuum pump and jammed the small hose into the bleed screw hole on the secondary and sucked out the air. I then finished off with a few pump of the primer pump. - it went very quick - just a couple of minutes and made no mess.