manual bilge pump

[duschl]

Hi,
I have some through holes in the cockpit which used to accommodate a manual bilge pump - I do not know which manufacturer. The pump is now gone and I am wondering whether anyone recognises the model that used to fit into this hole pattern.
I want to avoid sealing these holes and drilling new holes, etc...
Some photos attached. The two larger holes at the top may not have been part of the manual bilge pump.
Thanks,
duschl

[tkeithlu]

The Mark 5 Whale pump has a 6-hole bolt pattern like that. Take a look at the base plate in the exploded view farther down the page of this PDF:

https://www.whalepumps.com/marine/si..._0116_db_2.pdf

No guarantees, but worth a look. Your hole is 2" by 3", causing me to suspect American design.

[duschl]

Thanks, that looks promising... I will contact Whale Marine Products and seek confirmation. Cheers!