Originally Posted by old polaris tech

If you check most of the posts on oil change,MOST people don't take the tank fitting off! I only did if I knew machines weren't maintained well OR if I replaced bad cams or engine over hauls. The screen will almost always be clean and after I did a whole bunch of them,I just drained the oil and filter! Also the only time to clamp off the tank vent line is if you take off the fitting! May not sound "KOSHER" but when I change oil and filter, I would drain the tank,leave the old filter on and RUN engine for only 10 seconds which would drain the sump through the oil tank. Then I would remove the old filter and replace along with the two quarts of oil. I would run for several minutes,then check oil level with dipstick all the way in. If you don't run long enough,it will show a little over the full level. Over the years I've done countless 500 engines like this and never encountered any problems! The instructions to clean the screen EVERY TIME is just Polaris covering their azzzz. Just my old opinion again! OPT