Mercruiser starter bolts broken off in block?

If the starter bolts on your Mercruiser engine are broken off in the block, you'll need to remove the broken pieces carefully. Start by using a left-hand drill bit, which can sometimes extract the broken bolt as you drill. If that doesn't work, you may need to use an easy-out extractor tool, but ensure you have the proper clearance and technique to avoid damaging the block. In extreme cases, you might need to have a professional machine shop handle the extraction.