Most probably for push and/or self propelled lawn mowers, I'd say. The 4hp IC Briggs was standard fitment to SupaSwift Big Bobs through the 80's. I've also seen one recently on an SB 720(?) at the local tip shop.
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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