Ran 3hp Yachtwin without prop for 10 mins- should I worry?

[LargemouthBass21]

I ran the motor in a barrel for 10 minutes or so at about 1/4 to half throttle. The engine did not seem to be racing or “screaming” and sounded ok. It was pumping water and didn’t overhead. I read that running with no prop is bad. Did I hurt anything?

 

[LargemouthBass21]

https://youtu.be/iobi2CO4Bm8
heres what it sounded like, keep in mind it’s not tuned and it’s kinda cold outside. It’s its first run in at least 2 years most likely closer to 10

 

[F_R]

I kind of doubt you hurt anything, but I certainly wouldn't recommend continued running at that RPM under no-load conditions for an extended time. The reciprocating load on connecting rod bearings is different when running no-load vs loaded. A chainsaw is built to take it, but that poor little 3hp isn't. Just don't make a habit of it.

 

[LargemouthBass21]

I kind of doubt you hurt anything, but I certainly wouldn't recommend continued running at that RPM under no-load conditions for an extended time. The reciprocating load on connecting rod bearings is different when running no-load vs loaded. A chainsaw is built to take it, but that poor little 3hp isn't. Just don't make a habit of it.

I felt so dumb when I saw that like oh man why didn’t I think of that. I certainly won’t do it again! Thanks for al least making me feel better about it