After trying to launch my boat while the lake was very low, I scraped the nose cone section of the lower unit (Mecrusier Alpha 1) on the concrete ramp. The good news is that it only put a scrap about 1 inch in diameter on it, the bad news is that in the middle of the scrap is a very small hole from which gear lube has started to leak out of. Can the lower unit be welded to patch the hole? Does it need to be disassembled before welding? Is there another option for repairing this without replacing the lower unit?<br /><br />Thanks in advance for any info