filwud

well. the impellor i ordered was too small. i must have followed the wrong link. anyway the 4mm ss rod and drill arrived so i did the mod i described and its all back together and working well, though maybe a 4.1 /4.2 mm drill would have been better, it took some 'easing' of the holes to run free on the spindle, its quieter now than its ever been. ill order a new larger impeller for next time because i think the old one is at its max spindle size now. though i am tempted to see if i can recess the impeller bearing holes and fit small bushes to fit a new shaft when required. I did have to turn the ends down to 3mm to fit the rubber bushes in the housing snuggly

im glad i found this,just removed my very noisy pump and found ss shaft worn and plastic bearings worn too. ive ordered one of the suggested replacements above,but also ordered 4mm ss rod and a 4mm drill, im fortunate enough to have a lathe so i will try drilling out the original and use the new shaft. i also found carbon fibre shafts too,if this works ok i might invest in a carbon fibre shaft. i have gone to 4 mm because the plastic bearings easily accommodated a 3.7mm drill in the most worn area. as far as i can tell the original shaft is 3mm where it isnt tapered with wear, will see what happens.thanks for all info above