Volvo Penta Cooling

[Waterman!]

Hi Guys
Can anyone tell me whether you can change out the small diameter RW pump from an AQD40A to the larger diameter like is on the AQAD41's and similar?

 

[Grub54891]

Why do you want to change it? Factory set up is usually just fine, if you are having problems a bigger pump will hide the real problem.