I got a 2005 50th anniversary Polaris sportsman 90 over a week ago that I am fully restoring and going to resell. While I was taking the engine apart, I saw an oil tank I guess? It was underneath the seat. But, I also saw under the engine a drain bolt. I removed the drain bolt and a caramel colored liquid came pouring out. I'm not sure what it was at all. Which one of these is the oil? And I thought that on 2 strokes that you just mix the oil with the gas tank... Please help!

 

You drained the gear case oil...Fill cap is right above at the top. Doesn't hold much,around 10 ounces per the manual. The factory had a thick 80/90 wt gear oil (too thick imo) but the manual calls for Polaris AGL or equivalent for the gear case.The oil tank under the seat is for 2 stroke injector oil for the engine. Entirely different oil that doesn't have to be changed,just topped off.

 

Ok I'll just refill the gear oil then. Do I still need to put 2 stroke oil in with the gas tank? Or do I not need to since it has the oil tank under the seat? Thanks

 

NO oil in the gas tank.. The oil tank holds the 2 stroke oil that's injected into the carburetor then into the engine with the gas. Should be a small black injector hose leading from the carb down under the plastic cover on the right hand side to the oil pump unless someones removed it.

 

Ok thanks for the help! It has enough oil already. I went to advanced auto and got some Lucas 80-90w gear oil and I'll fill it up tomorrow. Once the parts for the atv come in I'll put the atv back together and see if it runs!

 

When you get ready to crank it even with the manual choke on,block off the air box intake tube with your thumb. Makes these little ones crank faster,pulls in fuel quicker without having to grind on the starter.