My brother acquired a 25hp 2stroke mercury that is apparently only a few years old (don't have the year) and has very low hours on it. Someone ran straight gas in it and it's seized. I've tried dumping oil down the spark plug holes, still not freeing up with the pull rope.
Question is should I try turning the crank with a wrench or just pull the head and see if the cylinder will come off the pistons??
We are hoping that a bore and some new pistons will bring this motor back to life. Are we wasting our time? Lower end spins just fine.