Ive got a 15ft runabout with a 115 inline 6 Mercury hanging off the back.
I originally ran a 15p prop, and boat was porpiosing badly
I fitted a hydro stabiliser whiich solved the porpiosing but noticed that the RPMS ran too high.
Also had a rooster tail effect
I then fitted a 17p prop, and...
Dave thanks for your messages and videos, followed in detail.
my motor would die immediately on idle if you increase the throttle.
did the fuel system, as you did. Problem is still there. If you start with some throttle it revs up but with a very rough idle, seems to get better when the motor...
