21SE engine height

[Bigboy]

I have a 21SE powered with a carb 150 yamaha. The motor is mounted one hole up from the deepest position. It seems that the motor is to deep in the water. Should I raise it one or two holes higher?
While running on plane, the water passes just under the bolts that hold the lower unit to the motor.

 

[warthog5]

While running on plane, the water passes just under the bolts that hold the lower unit to the motor.

By your words about which bolt hole it's in, I would have said it was to low. But by your statement above...It's sounds like it's right.

The best way to show this will take 2 people. One to drive the boat and get it all trimmed out and one to take a pix of the motor and the way the water is rushing by it.

The cavation plate should be on the top of the water.

 

[Bigboy]

The cavation plate is not visible while running at speed! I think I'll raise the motor by one hole and maybe adjust from there.

 

[warthog5]

Yes....It needs to go UP. Each hole is = to 3/4in.

Raising the motor will raise your RPM and your Speed. This "Can" cause a need for a prop change also.

It's all part of dialing one in.