Fished all day Saturday no problems with engine, Monday took my 2011 225 SHO to the dealer for the power head replacement. Not having any problem with engine but decided not to wait and get it replaced now before spring fishing. Got a call from him today engine was completely trashed internally, metal shavings everywhere and now need additional parts like new heads and a few other things beyond the Yamaha provided Short Block. He was contacting Yamaha, engine is no longer on warranty but hopefully they will fix everything, we will see. Not sure how much heads cost but doesn't sound cheap. Never had any signs of problems but am now glad I didn't wait other wise next fishing trip would not have lasted very long.