I have an early 2000s gas pressure washer with a bs flat head engine. Before it got cold out i tipped the unit forward to drain the pump and pulled it over a few times to clear out any water. Well i moved it out of the way the other day and couldn’t resist pulling the starter rope. To my surprise it was locked up and wouldn’t move at all. I figured some water must be left in the pump and froze. I took the unit into the house to thaw out. It’s been two days and every time i walk by it i try and see if it will turn over. It’s still locked up. I have not done any diagnosis on it yet. Any ice would have thawed by now. Has anyone ever had this issue?