I have been plagued by poor telltale flow since I got Luna. Sid, our island guru, has done two Saltaway treatments, each of which helped a bit, but no cure. Next, he replaced the impeller, although when opened up the existing impeller was OK. Then he took off some kind of cover and could do some actual scaling of water channels. This week, water flow was intermittent and since I don't know how the thermostat works (on-off versus some proportionate kind of flow) I watched and waited: eventually, the water was quite hot, but I could stand it on my fingers, soI took her out. As soon as I took the rpms above idle, the overheat alarm sounded; drop back to idle and it went silent, water flow ragged, water hot but bearable. When I had the boat back in and secured to the dock, I revved her again (~2000 rpm or so) and this time the alarm sounded, the telltale stream was strong and the water was STEAMING! I shut her down and let her cool overnight before I tilted the engine to drain. I guess the next step is to try a new thermostat, but I don't see how a faulty thermostat could give these symptoms. Any advice will be appreciated, because my summer on the water is just "pissing" away. :sad
Thanks,
Rod
Thanks,
Rod