morning Grumpy !! hi all nope dont think there is a filter or a pump ... have cleaned out the tank and carby n guessed setting by ear and does run well lots of power low in revs and smooth thru acceleration i used the info on the link u gave grumpy and worked very well ...dunno why thay call you grumpy ??? seem like a nice bloke to me !!! cheers p.s. what do yer think of the mower chassis ??