Hi Rob,

The larger of the two motors will get the boat on the plane, no problem.

Depending on the total weight, even the smaller motors may be able to do that.

Problems arise if you try to run it for prolonged periods of time as a semi displacement hull, just before it will get on the plane; in this phase, the smaller motors will overheat and die, the larger will play along a little longer, but it's a lot of strain on all the components.

You can play with the set-up a lot and figure out which propsize will get the boat just on the plane, so you'll be close to full throttle when in 'semi displacement mode'.

Regards, Jan.