We had the 380 out today with a “new” 2-stroke 9.9 Johnson, and it planes absolutely fine even with my wife and I sitting right at the transom and the fuel tank in the back. The flat tube ends seem to make a huge difference, with Sarah at the front there is almost no bow rise and it planes at super low speed. We’re extremely happy with the performance. Top speed today was 26km/h with the 9.9.
I’m trying to source a 15hp carburetor to bump the motor up. It would be nice to cruise at the same speed without running at full throttle, but otherwise the 9.9 moves the boat quite well. I’ll let you know how it runs with a bit more power!