I believe my engines are TAMD40A. They are inboards. The boat was advertised as having TAMD40B engines but the plate on the engine, the engine and injection pump serial numbers all indicate they are TAMD40A engines.
I think Troy upgraded the raw water pumps to the larger 'B' pumps. That explains how I have 'A' engines but 'B' pumps.
By the way, I installed the two pumps today and fired the engines up. Both engines started easier, especially the port engine that was a little hard to start.
I have Perko strainers. I don't have the Volvo strainer that sits above the raw water pump.
I also finished my project to add switches to the batteries to the engines and replace all ground cables and power cables.
The list is started to get smaller.
Bill