The manifold fits to following engines

Engines
Mercruiser 93174 Mercruiser 4 Cylinder 3.7L
Mounting Kit (included in the package)
Kit No. HGE8561MK
Content Qty
HGE88562 - Elbow / Reservoir Gasket 1
Bolt 7/16" 14UNC x 4"
+ Lock Washer
4
4
Steel Plug 3/4" NPT 3
Brass Plug 1/8" NPT 1