Hi Norm,
Yes I did at one point way back - but I am happy to do so again to dispel the thought that the housing itself is a factor - as mentioned it's a factory fitted one that Masport used to put on their GXV160 fitted mowers and whereas Masport intended you to run two airfilters in it - the honda one down low and a Victa long cylinder one up high - I don't run the Victa one - instead just having some coarse mesh to block large debris.
I will remove the housing, run and rev and report back.
Cheers. :-)
