Outboard HP on WWP 19

Mar 27, 2024
1
Mistral 16 St Lawrence
Bought the tach and installed it. Worked right out of the box! Went out on a calm day with engine maxed at it never got above 4,500 rpm and about 6 mph. Went ahead and bought the 8.375x6 high trust prop (elephant ear version). Will let you all know what happens. Engine was rated for 4,500-5,500 rpm so I'm hoping ill get that extra 1,000.
and how did it went?