I did a test yesterday- operated the boat for an hour (telltale output was fine) and then brought it into the slip. While engine was still hot I immediately trimmed it up just enough so impellers were out of water, and connected a host at half max pressure to the flush port. Per the owners manual, I started the engine. There was a lot of output at the impellers and at the prop, enough so I dont think there was risk of impellers overheating. However no telltale stream.
So now I'm wondering if there is an issue with my engine which is fairly brand new, or if the above is normal. Can anyone else with a Merc 4 stroke, year say 2020 or later, tell me if water is supposed to expel from telltale, in addition to from the impeller & prop?
thanks