evinrudeparts.ca ----can offer free shipping on orders of $79 or more.-----You need to do some trouble shooting / testing before ordering parts I say.---I suggest the latest water pump kit with instructions.
Still lots of folks out there who do not install a new impeller every 5 years.----Typical to see that damage.-----Compression test must be done.----Post the numbers.
The fitting where water tube enters the powerhead has a grommet.----Checked that ?----These motors run fairly cool.----Tell tale should never be hot.----Are you testing with boat launched or a test bucket ??
Magneto plate rotates.----May be a broken wire that you can not see.---May be a bare wire going to ground.------Do some testing or hurry to a repair shop !
Some simple testing to be done to find the issue.----Or bring it to a shop.-----There may be a kit available to solve issues with UFI module under flywheel.
Need to explain in more detail I guess.-----If driveshaft spline is rusted into the crank you may need a small atomic bomb to remove power head.-----So if lower unit comes off , that possibility is eliminated.-----Good luck with your project.