If you do not see a hdy filter on the outside, it may be like my 1900. if it is, the filter is a metal screen, internal and is a real pain to clean. There is a large metal line running on the right side front to rear. Both ends have to be disconnected to free the filter that is attached to the front end of the metal line. I have thought of cutting this metal hose and installing a filter base with screw on filter. Because of all the hassle I've only cleaned my filter 3-4 times in 30 years.