ive replaced all the fuel hoses front to rear the only orignal bit is the filter to pump which is steel across bulkhead,im gettin a little bitove air just few tiny bubles (after filter,changed filter,no change) but the main brain ache is after 30 seconds of being stood the filter lift pumps soft or as soon as you start it its soft,checked to see i had to copper washers on pump banjos(there is!) so im baffled now