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Yes twin inboards - they are this version - 5.7L MIE GM 350 V-8 1988-1993 - 0B788197 THRU 0F024999.
Yep higher temps mean low water flows it's why I replaced the riser and impellers and flushed the raw system w/ shore water.
What I am beginning to wonder is this idling issue might just be...
In the water in my marina. Good to know that point between the manifold and the engine is always the hot point. Part of the fun of the infrared temp gun is you get to poke around see exactly what's going on. Still not sure what to make of the exhaust section running hot - again maybe normal...
I am thoroughly stumped and could use some help but also this whole situation makes me wonder if it's just inherent to these engines.
Situation: At idle, the exhaust hose section right after the inside riser (meaning in the middle of the boat see diagram) on my port engine runs hot getting up...
