The 2-stroke Nissan/ Tohatsu outboards are pretty simple in design and very reliable. Standard maintenance parts like impellers, seals, and carb kits are readily available but some replacement components like shafts, gears, and ignition parts can take months to get your hands on.....(a backorder from Japan situation goes about like you'd imagine).
Truthfully though, a Jap motor with an ignition problem is pretty darn rare. Stay up on your maintenance, don't abuse it too much, and those motors will run strong for a long time.