Oil Change 912

[Slyfox]

I remove the top, I do not remove the hoses. suck out the oil. clean the tank and pieces. put back together. remove the filter, fill the new filter, install. I now keep the mags off and crank over until my oil pressure comes up, usually very quick. start the engine, recheck the oil level. been doing this for many oil changes can be done very quickly, usually within 30 minutes.

[mr bill]

For many years on other engines, I have added a powerful magnet (from a hard disk drive) to the low point of the oil filter. Cutting the filters later usually shows a small amount of ferrous metal, mostly from the rings and cylinder walls, but very little in the engine during overhaul.

[Av8r3400]

For the sake of an extra 10 minutes, why would you want to suck the oil out of the tank when you could clean the tank thoroughly, inspect the gauze and also get all the sludgy oil out?

Just curious.

In my model IV, for example, reaching the drain plug at the bottom of the tank is almost impossible. Taking the oil out the top is the only viable option...

[Monocock]

In my model IV, for example, reaching the drain plug at the bottom of the tank is almost impossible. Taking the oil out the top is the only viable option...

I can't reach the drain plug either. So instead, I take the tank out and tip it upside down, wipe it all out and put it back in. It takes 10 minutes.

[Dorsal]

So who sends their oil samples out for analysis and if so who to and what information do you get?

[Slyfox]

For many years on other engines, I have added a powerful magnet (from a hard disk drive) to the low point of the oil filter. Cutting the filters later usually shows a small amount of ferrous metal, mostly from the rings and cylinder walls, but very little in the engine during overhaul.

there is a plug on the side of the gear box that you can remove, it has a magnet, mine has always been clear of metal.

[SkySteve]

Does anyone drain the oil cooler? I always do but am not hearing anyone mention that step in this discussion. Some greyish lead induced oil always comes out of the cooler. After filling the oil tank with fresh oil, I remove the plug with the pressure spring and ball on the oil cooler, then induce just a small amount of light pressured air into the oil tank overflow hose. This circulates the oil thru the oil cooler which I let drain into a pan until clean oil appears. Then re-insert the pressure ball, spring and plug.

[Slyfox]

I use auto gas, so I don't think it is needed. If I have to use 100LL I use the decalin. I've never had to do it. I stopped when I found that less than a cup is drained when draining hoses and such.

[DanB]

Just a heads up...
As a newbie in the world of all things Rotax and maintenance, I have been looking around for a wrench that will remove the oil filter off of my 912S.
The following link to CPS shows a wrench that advertises specifically for the new filter (14 flute).http://www.rotaxparts.net/Scripts/pr...idProduct=1458 Long story short... It will not fit between the exhaust pipe and the filter...no way.

What I found to work was one of those slip ring wrenches only after I run some thin rubber around the filter. I think I will just glue the rubber to the inside of the ring and call it good.

[Slyfox]

big pair of channel locks.