MerCruiser 10-53728 Exhaust Manifold Mounting Bolt Set 8pc V6 V8 4.3L 5.7L 350 Starters & Alternators From my research it seems

From my research it seems that this might be compatible with other Yamaha 4hp 4-stroke outboards 1999-2005

Nipple & stud assembly

Item Description Mercury Part Number 11-24493 Brass Propeller Nut KF7 KG7 WG7A

This would have been used on Mercruiser 4cyl models 2

MerCruiser 10-53728 Exhaust Manifold Mounting Bolt Set 8pc V6 V8 4.3L 5.7L 350 Starters & Alternators From my research it seemsPart Number(s) Included MerCruiser 10 53728 Exhaust Manifold Mounting Bolts Set You get the set of 8 as pictured (. 375 16x4. 625) General Application Compatibility This would have been found on all MerCruiser V6 V8 Exhaust Manifold mounting applications 1965 2000's (possibly later) Other Details Freshwater Used Parts Overall Good Condition! Purchase with confidence! GM 305 350 5. 0L 5. 7L V8 198hp 200hp 228hp 230hp 260hp GM 262CID V6 4. 3L 4. 3LX 4.