I always look for an easy access pull start option on any electric start outboard I've owned. It certainly got me out of a jam years ago when a stuck trim switch flattened the battery on a Mariner 75 while under way.
My Zapcat's Tohatsu 50 is an easy starter but I still need to be well braced and using two hands to start it from cold. I have pull started my Yamaha F100 but that was no joke standing on a trailer. An attempt to see how it would work out at sea made me realize the chances of going over the side while trying it in a chop are better than 50/50. The high compression means the manual start pulley is very large diameter and I nearly had to run the length of the boat to turn the engine over
As Mythbusters say plausible but not a confirmed option!
A few words of advice include:
If you think you'll ever need the facility - try it before you really need it.
You'll need some tool to undo a couple of bolts on most Yamahas while my previous Mariner 90 used a couple of plastic wingnuts.
You'll also need an actual rope the right diameter or you won't get enough onto the pulley.
Don't wrap the rope round your hand(s) a backfire will do you damage.
Don't use something longer than necessary in case it snags the flywheel and starts getting wound into the engine after it starts - e.g. a ski rope.
Make doubly sure the engine is out of gear as interlocks only lock out the starter relay and won't prevent pull-starting in gear.
Make sure you have the ignition switched on.
I'm sure there are a few more tips to be addedd so feel free.
Best of all as the British Navy advises should one find oneself bearing down without way upon a Lee Shore, avoid the situation.