Fired up my 1987 4.3 Cobra yesterday and see that I have a small leak in the right exhaust manifold just above the drain. The crack is about an inch wide and level with the floor. The amount of leakage is a small drip.<br /><br />The engine ran fine and the plugs are not clean, as they would be if water was intruding.<br /><br />I will be ordering new manifolds. But, should I try to use the boat in the 3 or 4 days before they arrive? I'm thinking it might be OK, as this leak may just be external.<br /><br />What do you think?