Running a diesel in silty river water?

[KodiakMike]

Hi - Last logged in from California, in Australia now! I'm wondering about driving our boat up the Clarence River here, which has had some significant rainfall lately and has gotten pretty silty - water is brown and you can barely see an object one foot down. So, I'm an ocean sailor - are there any bad implications for running this silty water through our Yanmar 4JH3E? We're only looking at 3-4 days, likely no more than 20 hours total. The oil cooler should be fine, it's just pipes and shouldn't silt up. Raw water pump might take a little extra wear but should be OK, I'd imagine. How about heat exchanger - just more pipes, nothing so small that it couldn't handle a little brown water? So...is this the sort of one-off operation in silty water no big deal at all?

Thanks for the help...