More about new oil filter...
When I bought my first Rotax oil filter, I also ordered a Rotax oil filter wrench that fits the base of the filter. I did an oil change today and guess what....? The oil filter wrench does not fit the new oil filter. The base on the new filter is completely different....grrr
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The new filter is still black in color, with the Rotax name on it but it has a different part number than the old one. I also did find to be true what the others have said about the filter not accepting oil when you try to partially fill it before installing. However, I think that by turning the prop by hand 20 revolutions that would fill the filter. It would also get fresh oil to all the bearings and pump up the lifters before start up. I see about 10 psi oil pressure when I prop the engine to burp the tank.
Rather than buy another Rotax oil filter wrench to remove the filters, I am going brutal with this type wrench which I bought a few years ago for a car I had that had a filter placed on top of the engine in a place where no other tool would work. This simple tool gets any filter off in 30 seconds:
The picture shows an inexpensive filter and not a spendy Rotax filter
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Of course, one would not use this type of wrench to tighten a filter on. That is accomplished by hand using 3/4 turn from when the gasket touches the base.
Also, a caution. Be sure that the filter you take off does not leave its rubber gasket behind on the engine flange. That happens occassionally on cars and has happened on my Rotax today. If you don't see this has happened and remove the old gasket you could install the oil filter with two gaskets and the gasket is sure to blow probably at some inopportune time. I have heard of this happening on cars, and it can happen here as well.
Tony