Tonight, I went to the boat for an oil change. I read somewhere that it's good to do an oil change annually or every 50 hrs on the engine. I have a Yanmar 2GM. Watching this video on Youtube was helpful to see how to do this. http://www.youtube.com/watch?v=9kiwfbL7H74
Here, you can see the oil fiter with the date of when it was last changed.
The last time I went to West Marine, I got this oil extraction pump. It looked pretty good out the box. The plastic container is hard.
The dip stick is on the side and down low of the engine in a not so easy place to see from the front. Thankfully, there's a removable panel on the sides of the quarterberths to reach it. I put the tube in there and got pumping and it worked out well.
Here you can see the stream of oil going into the container.
Filled up pretty well in about 15-20 min.
Once the oil got into the container, I switched out the oil filter with a Fram PH3593A I picked up at Walmart. Everything seemed to go well. Hopefully the engine will run fine after this.