An easy way to remove your old engine impeller after removing the cover plate is to spray it with PTFE lubricant. Then turn the engine over on the battery a few times – making sure that the engine WON’T start by pulling out the engine stop control. Now grab hold of an impeller fin with a pair of pliers and it should slide off the spline with little effort.
No need to use a screwdriver and thereby risk damaging the pump sealing flange.
Thanks to PBO reader Peter Baylis for his tip. Send yours in – email pbo@ipcmedia.com