My 2003 25 HP Yamaha O/B stopped abruptly with a thud almost like I had hit something in the lake. I took off the cylinder head to inspect the pistons/cylinders and they are clean and smooth. The piston actually move freely about a 1/4 inch but will not move any further. It almost feels like it would if the motor was in gear when I try to turn it over with the starter or pull rope even though it is in neutral, the and prop will spin. I can put it in gear where the prop locks in and when I turn the prop the shaft moves the pistons the 1/4" or so. Any ideas what to look for? does this sound like a lower unit issue?
Thanks in advance for any advice!
Beads
Thanks in advance for any advice!
Beads