How far do you have to run a boat to get it good & hot & Blow the Sutt out of it from sitting to long ? Running speed from 65 - 67 MPH   GodBless & Thanks A Lot

Assuming you have fresh fuel with your favorite fuel cleaner mixed in, a 10 minute run at full throttle in warm weather should clean it out good.

12 minutes ago, rboat said:

Assuming you have fresh fuel with your favorite fuel cleaner mixed in, a 10 minute run at full throttle in warm weather should clean it out good.

I agree and I also run the last few miles of every fishing trip wide open and trimmed up to clean it out before putting it on the trailer.

All engines will have some carbon build up. Depending on age and how its been used you could always fog it with seafoam

What do you mean trim it up, more than average , what does that do ?

9 hours ago, Ghostshad said:

What do you mean trim it up, more than average , what does that do ?

 Trim the motor up(with power tilt/trim) to increase RPMs and speed. More than normal for me as I do not run wide open normally. Wide open will help decarbon the outboard.