In Reply to: Re: 8N losing oil prime posted by Greg Davis on July 23, 2020 at 06:57:42:
I just ordered from Just8N's and I have no idea what brand I will will receive. As I said as soon as I get them I will measure the gears to be sure. I have the last of 3 "no-nsme" kits on the shelf - plain cardboard box with Made in Turkey printed on it and I don't recall where I got them. Those kits were all fine. This has been going on for over a year so maybe things are beginning to get corrected but I still check each and every one I get regardless of brand.
Failure of the oil pump to self prime has been a problem with these engines for a very long time and is not always related to defective replacement gears. That issue is just a new wrinkle to a long standing issue. Here is a thread from a few months ago that is eerily similar to your post. The problem was resolved the old fashioned way - thorough and accurate measurements:
Oil Pump Losing Prime