On my 2007 Tige fitted with a 340hp Marine Power, I went to change the water pump impeller and came across a rubber bush that fits into a bracket that prevents the crankshaft mounted pump from spinning. The bush has seen better days and needs to be replaced. I have measured the spigot of the water pump and got a measurement of 15mm. The pump is a Johnson F6B-9.Can anyone give me better measurements or a manufacturer that makes these bushes or how to fix/replace.