Agreed. He has never confirmed whether it’s pumping water or not. The 1957 35 is NOT forgiving when it comes to being overheated. The 25/30 block was bored to make for 35 hp. As a result, the block walls are thinner than their predecessors and very prone to overheating. I have taken about 10 of these powerheads (1957 35 hp) apart and 7 of them had the top cylinder roached due to insufficient water flowing around the top cylinder. The cylinder walls were scored and the blocks were junk. All 7 had dried up, bent-vaned impellers. In that video, the clicking toward the end indicates the overheating and seizing.

Dobber, please confirm whether or not the motor is pumping water. You can demonstrate that to us with a video at idle. Also please confirm you’re running 24:1 (gas:oil).