Re: first photo. WHAT are all those wires on the coil? Do you know what they are? Re: second photo. Engine isn't THAT new - it has the oil spray line to the lifters (good thing).
Original post: erratic gauges. I suspect antique wiring & bad connections.
Sudden stop: classic bad coil, but see above.
Black stuff in fuel: seems you've replaced everything but the fuel?
Why the water in the engine? Exhaust? Manifold?
Seems you have a number of issues to address. With the engine in the boat, you're forced to address them all at the same time, which is difficult. Even with a perfect rebuild from Moyer, seems the boat issues would doom the new engine in short order.
Original post: erratic gauges. I suspect antique wiring & bad connections.
Sudden stop: classic bad coil, but see above.
Black stuff in fuel: seems you've replaced everything but the fuel?
Why the water in the engine? Exhaust? Manifold?
Seems you have a number of issues to address. With the engine in the boat, you're forced to address them all at the same time, which is difficult. Even with a perfect rebuild from Moyer, seems the boat issues would doom the new engine in short order.
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