If you decide to replace the pump, move up 2 or 3 models, with ones that have a higher volume and are more quiet. Some info on this site. Lots of info on marine web sites.
You won't regret having a bigger & better pump.
Bill N8HDW & Nancy N8HDV
2005 Sea Breeze 8341 on W-22 Chassis
2008 Saturn Vue I-4