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Outboard engine Water flow problem

Recently my 2005 Suzuki DF115 stop peeing out the back. This happens all the time because I run in the shallow marsh normally. I can always get it flowing again by sticking some fishing line in the pee hole. Not this time. I have stuck fishing line 3 ft up the hole and used an air compressor. It now drips out. But still no real flow like in normal operation.

I have pumped water through the hose outlet on the side of the engine, through rabbit ears while the engine is running in the back yard and dropped the boat back in the water at full speed. It has not overheated and shows normal flow out every other hole in the lower unit as normal. Still just a trickle of water.

I do not remember having any problems when I went fishing two weeks ago. Before I noticed no water flowing out the pee hole, I had just finished changing out the main engine oil, lower unit oil and spark plugs. I do not think that has anything to do with the water issues, but I figured I would give the full story. Anyone have any ideas?
Spider nests can be hard to dislodge. Did you use compressed air in thru pee hole and up the line from water pump too ? remove thermostats and blow thru water jacket ?
I had a spider nest problem one time and since have put a piece of tape on the Pee hole when in my boat shed. I run motor on rabbit ears before taking it to fish and I remove tape then. I have had no more spider problems since using tape.
If me, I would start with solving the first part of the mystry. I'd change the pump impellor. I change mine each and every year. It's cheap insurance especially if you are running in mud,sandy or weedy conditions. Just because on a normal day the motor is peeing, does not mean it's enough pressure to fulfill the motor cooling requirements.

Make sure the rubber gromment is fully intact in the top of the pump houseing, where the drive shaft goes thru the water pump. Those little dudes take a beating too. Don't over tighten the water pump houising back down too tight, it takes inch lbs...and only a few

With lower unit off, wash out the water intake ports in the lower unit, flush em' out good.Make sure the water tube from block to lower is aligning properly when the lower is reinstalled and if there was a sleeve on the tube, ensure it's not cracked or deformed.

Your next area providing minimum dissasembly would be the thermostat housings as mentioned. gunk will lodge there on the thermos. With the thermos out, back wash thru each themo opening, back to the lower unit.

This time of year with all the mudd dobbers coming out, I insert an object into the water pee tube on all my motors to keep the little critters out. I'll use a section of weedeater line and shove up the tube several inches and loop a section of line around my steering wheel to make sure I remember the hose is in the tube,,and remove it before starting the motor,, these old gray hairs done sucked a few too many memeory cells away....... good luck !
water pump
How long ago has the water pump been changed. This would be the first thing to tackle.