Re: 2nd tell tale for Mercury Mark 58 on top of motor

[rusty356]

Travis: I have worked and got running at least 20 Mercury 4 cylinders, maybe more, on only 2, including this one, was I not able to get the tell tale to work. I have used wire, air pressure, with a small hole in the nozzle to make sure it got in. The other one, I could not get was a Mark 55, about a year ago, and it had had the water jacket off and the head jacket, I assumed that they got sealer into the hole and plugged it. But this motor, as far as I can tell has never had the head removed nor the water jacket, I rebuilt the mag, new bearing, new wires, timed it etc etc. It starts, runs and idles Perfect! But no tel tale, we worked for hours on the tel tale, maybe the water has by now softened up what is plugging it, but I am ready to drill and tap it, and I also have the 90 degree hose bib to install. Any ideas about unplugging it would be great. Rick PS we have also restored about 25 Mark 25’s, in last 10 years, but now only the Mark 58’s interest us.