I've been acquiring some older copper Briggs horizontal shaft engines. 3 hp and 5 hp. So far they have either spark and compression or compression with no spark. I may be able to get some that run but in my opinion they would need work but could run and become a decent mini bike engine. I would like to know if there are other members out there that would be interested in these copper Briggs engines. I thought they were more desirable than others but what do I know.:shrug: Let me know your opinion and maybe if they are wanted I may continue acquiring them to sell. Example of one I recently bought is below....