Try to figure out what caused it. The same thing happened to my Yamaha. The mechanic I have working on it knows his stuff!!! He found water had somehow leaked into the oil tank and was injecting water with oil into the cylinders. He asked me if the boat had been full of water? I remembered a month or two before the engine failed, I was caught in a bad storm at Grenada, MS. It rained so hard, it flooded the roads in the campground. No one could get in or out. I had both bilge pumps running and pulled the drain plug as soon as I got back on the trailer. The boat still took on a lot of water. Mechanic said it probably leaked in through the vent. I turned in an insurance claim. Mechanic said he would show the water in the oil injector pump to the insurance adjuster. Insurance company said that if the damage was from flooding, they would cover it. Keeping my finger crossed now.