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Have you ever had your 4x4 seal literally pop out of the 4x4 housing on the Outlander 450? You will want to try a simple fix to keep this from happening. First, get the old seal out and clean the seal surface on the 4x4 unit with brake cleaner. Take your new seal, and remove the spring. Untwist it and clip off a half a centimeter or so of spring. Don't clip off the wrong end! I do this because these seals fail far too often and this seems to fix the issue. Put it back together. Tap seal into place. This is where you get creative. I was able to cut pieces of shelving metal that clamped against the 4x4 unit to prevent the seal from popping out and holding them in place with zip ties. You can do whatever you think you can pull off with what you have on hand. Just get something on the 4x4 that holds the seal in place on opposing ends. Oh, and always replace the yoke o-ring. Those never retain their shape and will cause leaks if you do not do so. Inspect the wear ring on the yoke and replace if you can feel a fine groove where the seal rides. Remember to use RED locktite on the yoke bolt and tighten that bolt tight as ****. This is the one that always comes off during abusive riding.

Keep in mind atv plowing is really just for a couple inches of snow. Not worth the wear for more than 4-6".

For plastic tanks, I remove the tank, empty it out, and plug all but the filler hole. I then rinse it with hot soapy water the best I can and check it with a flashlight. If there is still buildup present, I put a little aquarium gravel and hot soapy water in the tank and shake it to agitate the gravel, which usually loosens anything stuck to the tank. Once I'm satisfied it's clean, I remove the soapy water and gravel and rinse with hot water. Let it dry and inspect with a flashlight for cleanliness and to make certain there isn't a pebble stuck somewhere. That's about it. You can use solvents and such, but I don't like to. Metal tanks can be cleaned in a similar fashion, but if you have rust it gets exponentially more complicated. There are many videos out there on cleaning and coating metal tanks. You can get about as elaborate with that as your patience can stand. Sent from my moto g(6) using Tapatalk

I know this post is old, but if anyone else needs help with the threads, the best way is to simply replace the sieve cover. They are aluminum and are very fragile. You do not need to tighten the plug much to get it to seal. They say the engine must come out but that is not true. You can easily tip the engine with a pry bar with the exhaust, engine mounts, and a few other components removed and you will be able to access the bolts and remove the cover for replacement.