"After hitting a sand bar at w
"After hitting a sand bar at wide open throttle my Tohatsu 40d has a clanking noise. The noise happens in forward and reverse but not in neutral. I couldn't tell exactly where the noise is coming from even after putting a broom stick to my ear everywhere but it did not sound like it was coming from where the gears are. Can't see any damage to the gears, there's not metal in the gear oil, the prop shaft is not bent, and neither is the driveshaft, (put a straightedge on both). With the lower unit and water pump removed, I stuck the upper end of the driveshaft into an electric drill and spun it in forward and reverse and the noise was not there anymore. Since the noise is only there when the lower unit is attached to the running engine, I figured for sure something broke in the engine even though the engine sounds normal in neutral and even when you rev it up, so I took the whole engine apart except for the crankshaft assembly and still didn't find any sign of broken of bent parts, put it back together again and runs the same of course and still has the clanking sound. It has about 10% of the power it used to have when pushing the boat. A new prop and water pump were installed. This is a big mystery to me and I would greatly appreciate any ideas."
"After hitting a sand bar at wide open throttle my Tohatsu 40d has a clanking noise. The noise happens in forward and reverse but not in neutral. I couldn't tell exactly where the noise is coming from even after putting a broom stick to my ear everywhere but it did not sound like it was coming from where the gears are. Can't see any damage to the gears, there's not metal in the gear oil, the prop shaft is not bent, and neither is the driveshaft, (put a straightedge on both). With the lower unit and water pump removed, I stuck the upper end of the driveshaft into an electric drill and spun it in forward and reverse and the noise was not there anymore. Since the noise is only there when the lower unit is attached to the running engine, I figured for sure something broke in the engine even though the engine sounds normal in neutral and even when you rev it up, so I took the whole engine apart except for the crankshaft assembly and still didn't find any sign of broken of bent parts, put it back together again and runs the same of course and still has the clanking sound. It has about 10% of the power it used to have when pushing the boat. A new prop and water pump were installed. This is a big mystery to me and I would greatly appreciate any ideas."