Use an oil extractor pump
I use a pump to extract the oil from the pan. Most extractors come with a variety of hoses to slip down the dipstick tube and suck out the oil, but that is not what I use. I made an adapter to screw on the end of the engine's oil drain line and connects to my extractor pump. If I remember correct it is a 1/4 npt male pipe fitting at the end of the drain line. So you would have to buy a female pipe fitting and attach it someway to the extractor hose.I used to use a very cheap electric extractor pump, which I DON'T recomend. I just bought a new Oil Boy extractor to use this year. I haven't tried it yet, but I'm excited to use it. This is also what you need to extract the oil from the transmission. The link below is to the Oil Boy that I bought.I only put about 40 hrs. on my engine each year, and I change my oil at winterization. So I never make it to the 100 hr. interval. I've read though, that some people do change their's at 50 hrs rather than the recomended 100 hrs.