MD7 (raw water cooled) + Water Filter?

[workavoidance]

Hi there,

I suspect this is a 'stupid question' but I've been surprised in the past. I recently took ownership of a boat with a Volvo Penta MD7 that runs mostly OK.

While I was looking around the engine the other day, I noticed that the raw water hose from the Volvo S120 saildrive goes directly into the water pump">raw water pump on the engine. There is no raw water strainer in between.

Is this common? My gut reaction was to add one.
Thanks,

[SaylorMade]

That is how they were installed.
I just removed my MD7B, that had been like that since 1984, without issues.

Note, there is a "strainer" in the leg, where it takes in water.