Finally got around to looking at a briggs 35 engined Morrison. Wouldn't prime - soon worked out why
Question - if you lost the screw for the air filter, would you araldite a smaller bolt in ?

The guy (presumably a guy) put some much in that it ran into the primer hole. Drilled it out, and primes fine now.
It had more dirt in the carby than I have even seen in one of these - the dirt shown is only 1/3 of what was in there