I had been thinking about this but always forget to post it. One of my engines bf460v kawasaki doesnt' have an oil filter assembly installed on it. I bought this used. I do change the oil every 2 weeks ( service about 30 lawns a week) but have never installed a oil filrter assembly. I have never had any problems with how it runs other then a carb adjustment. Should I? Well I know I should but how bad is it? And it looks like it wasn't installed because it would be a really tight fit.