We have left hand engines and are using two piece starter nuts similar to the old Horstman or GEM Products nuts. The nuts fit Yamaha KT100, Komet piston port, Comer P50/P51 and Parilla reed jet among others. However, this product is scarce since both suppliers quit making them years ago. What are you using and where are you getting the product? We are running out of them as they age and wear out or break. Thanks.
The left hand nut does tighten against the end of the crankshaft so it keeps the right hand threads on the bottom part from unscrewing. That is way more reliable than blue Loctite. Both work but I would rather trust in the method we use.