I have done this once so this was a learning experience for me. I purchased a Sierra impeller #18-3008. It has a rounded key way, you need to square the slot up with a small flat file. It fits perfectly with a little filing. I made the tools I needed as I went. A flat bar about 1 1/4 wide took care of the spanner nut. A tool to pull out the impeller cartridge was a little harder to figure out but a little patience and things worked out good. I also pulled the power head off. Some people say you can change the pump without doing that but I did. As you can tell from the pictured I mounted the leg back in the stand upside down. Really worked great for working down in that hole. Pay close attention as to how the shifting paws go in the case, maybe take some pictures. Also there is a small drain hole on the gear case ahead of the propeller. Make sure it is not plugged. It brings water up the leg to the impeller cavity so it does not start dry. I need to get a picture of that 1/16 hole and post it. My motor is buried in the shed for now.
Loveem or hateem these Merc’s are interesting!
hope this helps
dale
Attachments:
