Does anyone know if there are prop locks available for Mercury M8 drives?

Try BBlades

Both are working on them but nothing is available yet. Just made these calls a month ago.

Teague Marines sells them for #6, most likely the same for a M8

Anti-theft prop nut shroud for indy/no6 propshaft
Hi maxonmike,
We make them in small quantities but they work out quite expensive, but they look pretty cool
Nearly time for us to come back to America amongst the numerous new parts for the Outerlimits is an anti-theft prop nut cover, i will have one at the Miami show if anyone is interested in seeing it. it is manufactured from billet 316 stainless and requires special tools to remove so would certainly stop the casual thief, it also looks quite smart. If there was sufficient interest i would do a production run.

Regards
Peter

Locks for 8's have not been engineered yet. I called Mcgard and Bblades back in April. 8's have a double nut set up.

Wow... They have been out for a while now... I would have thought they would be available...

Agree. Keeping inquiring, I suspect not enough people have yet.

Mike can you clear your in box...thanks frank

Peter,please keep me in the loop and I'll see you in Miami. I have to discuss your locks with you.