One of my maintenence items on our new 1975 H27 was to inspect the mixing ell for problems, I have read where this is a possible point of failure.
I noticed what appeared to be a slight crack in the 180 deg. U so I removed the entire assembly for further inspection. There was indeed a crack, running right across the threaded section. I got a new one on order and decided I would help the crack along with a hammer and cold chisel, as it would make disassembly a lot easier. A few well placed blows and.... The ell cracked in half exposing exhaust and water ports that are almost clogged shut. This was not visiable by looking into each end with a flashlight.
I will post pictures tonight. I cannot belive the engine ran with such a restricted exhaust flow and I cant believe it didn't over heat with minimal water flow. If you have an older boat It might be wise to check out this component!!!
I noticed what appeared to be a slight crack in the 180 deg. U so I removed the entire assembly for further inspection. There was indeed a crack, running right across the threaded section. I got a new one on order and decided I would help the crack along with a hammer and cold chisel, as it would make disassembly a lot easier. A few well placed blows and.... The ell cracked in half exposing exhaust and water ports that are almost clogged shut. This was not visiable by looking into each end with a flashlight.
I will post pictures tonight. I cannot belive the engine ran with such a restricted exhaust flow and I cant believe it didn't over heat with minimal water flow. If you have an older boat It might be wise to check out this component!!!
