Yanmar 3GM30 raw water pump

Took me a while to realise the large nut on the shaft is the opposite thread. Helped having a cheapo battery impact wrench to get it off but should have used a pice of wood or something soft to put in the slot on the shaft instead of a spanner, I made burs on the shaft that I've had to file off.

[@spelunkerd]

Thanks for the reminder about that left hand thread. Probably will get it done in half the time, with your kind help.

[@Sailingon]

It stumped me for a while, also the cheap impact driver although not great ,it did help. Now I have a bit more knowledge I'd be more careful putting something in the slot. I put a but on it and had to use a file to get the new impeller on.

[@slavedriver394]

@@Sailingon second that - if you twist hard enough the slot will open up and the shaft will be ruined.

[@fishingwithfilitsa]

Bravo very good

[@Karma-fp7ho]

Reverse thread!! Thanks.

[@capitana345]

Although this take is rather clumsy ( picking the right tools, out, things happen outside camera scope ,dropping things ), it still helped me taking apart my waterpump , to find that the bearings had complety fallen apart and the shaft is a bit damaged. >> time for a new pump !

[@billriner]

The impeller comes out easily using pliers.

[@Sailingon]

I didn't have any that fit in the gap. I now have an extractor which works really well.