Ugh! Help!

[JasonRE]

I went out to Lake Dauterive this past weekend and the water was LOW. Got stuck a couple times, due to not being familiar with the area. First two times I was able to get my 175 Merc Black Max pissing again. Third time no luck. Got off the water, went home and ran a weed-eater line through the pisser tube and saw mud on the tip. Hooked up the earmuffs, and nothing. Tried blowing it out with a compressor, nothing.

Is it time to remove the lower unit and replace the water pump? Also, this may seem like a stupid question but is the water pump unit just replacing the impeller, metal and rubber gaskets in the lower unit?

Thanks in advance!