Update: New muffler, flange and exhaust hoses installed on the port side Monday and Tuesday. Yesterday ran the boat and did a water test as well on the lake and the maximum temperature I saw was around 183 degrees on the port exhaust elbow while the starboard was about 25-30 degrees cooler. I even did a few full throttle pulls and the temperature never went above 185 while according to the temperature gauge the engine is running just under 160 degrees after getting to temperature.
So to recap, the boat has a new raw water pump, new impeller on the raw water pump, new thermostat, new gaskets all the way around, new muffler, flange and hoses on the port side only. The port manifold was gone through, cleaned and found clear of obstructions, new elbow sitting on top of the port manifold and I think I have finally stopped chasing my tail on this. Now to find gray carpet to cover the new floor piece I had to make to cover the floor that I had to cut out to get that muffler out.
'86 Comp TS6M - Reborn 2016
Riding a HO Sports CX Ski