Saving Old Seagulls

Today I bought a Watermotafrom some photos a friend sent me along with a few other interesting outboards as a bulk deal I couldn't refuse. The photo attatched is from the internet and I'm pretty sure it's the same model. Is this the 8hp model?
It's missing the magneto so I'm hoping that someone can help me identify the correct mag and if anyone can supply a photo also showing the drive I would be most grateful. Hopefully the mag will be something found on a stationary engine of the same period.
I imagine that this would be a reasonably uncommon outboard now and certainly is rare here in NZ.
Any information will be very welcome.

No picture

Don't know where it went but here's another go.

Thanks Ferrier120 for your pm. Tried to reply multiple times but nothing showed up in the sent folder. If your are on Facebook then you can find me through my page Shiloh Classics.