is connected to the housing 24 and has a recoil starter handle 27 spacers such as 28 and 29 space the recoil starter 26 from the housing 24 so as to provide air passages 31 so that air can enter through the housing 24 to the fan 23 as best shown in fig1 and 2 an annular member 25 with an outer rim 55 engages the outer surface of the housing 24 a circular ring type folded paper filter 32 is formed with a gap 38 and fits over the recoil starter housing 26 against annular member 25 rubber seals 37 and 36 are formed on one side of the filter 32 and seals 33 and 30 are formed on the other side of the filter 32 the filter 32 is placed over the recoil housing 26 against annular member 25 on the fan housing 24 with the pull handle 27 of the recoil starter extending through the gap 38 of the filter an annular foam filter 41 with opposite edges 42 and 43 has an inner diameter so that it can fit over the filter 32 and is formed with a hole 44 through which the pull handle 27 can be fitted a disc shaped plate 46 with a rim 40 fits over the filters.