Briggs and Stratton Starter clutch

The starter clutch on my old flat head 11 hp is worn out inside. Someone put it back together with just 4 balls. Or maybe it's just worn from old age. Or the combo. The thing is. The entire mower is worth maybe 100 bucks tops. Hate to spring for a new starter clutch. My question. I have an old 3.5 hp flat head Briggs. I saved it just to part out. Any chance the starter clutches will interchange? I'm guessing no. But it's stored 15 miles away. Thought I'd ask before I made the trip or sprung for a new starter clutch. Thanks in advance.