I have a Husky 55 oiler that will oil as quick as you fire up the engine but I don't know if it's oiling enough. Seems the bar/chain doesn't look "wet" enough and sometimes get a spark off the bar. It's a new bar and chain and the oil hole is correct and clean. Is the only way to be sure it's working properly to simply replace the oil pump assembly? What exactly do I need to replace - does Husky just sell the oil pump as a part # or do I buy individual pieces and repair the one I have? How much are these parts? Thanks.