Reply To: Mercury KB-1A gas tank leaks

[green-thumbs]

To lap the tank you will have to remove the studs. Treat the studs carefully. If stuck they will snap off flush to surface. Been there. done that, and don’t care to go back. When lapping it helps to coat the surface with layout dye or felt maker to show high and low spots as lapping removes metal.  Takes time and effort, but, results in a flat close fit that clamps the gasket equally at all points.  4 fastener tanks may be more demanding than later 6 fastener tanks.

Good Luck

Louis