Boat part number 1118251 is a new, 2 3/8" plug-in seat base, part number 330750-A1 .

This seat base is constructed out of aluminum and measures approximately 9" OD x 3 1/8" H overall. Requires an approximate 2 1/2" D x 2 7/8" Dia. below-deck cutout. Mounts with (6) 3/16" dia. holes set apart 4" center to center. Used with 2 3/8" plug-in posts.

Specifications:

Part Manufacturer: Unavailable
Part Number: 330750-A1
Material: Aluminum
Color: Silver
Post Size: 2 3/8"
Overall Dimensions: 9" OD x 3 1/8" H
Below-Deck Cutout: 2 1/2" D x 2 7/8" Dia.
Mounts: (6) 3/16" Dia. Holes Set Apart 4" CTC
Sold as seen in pictures. Customers please note every computer shows colors differently.
All measurements are approximate.
Hardware and instruction / installation manual not included.