Hi Bob

I am pleased to hear you have decided to opt for a couple of 90SP engines, I am sure you will be happy with your choice.

With regard to props, the 16x14 should be fine for running in. The 13x13 4-bladed prop though is actually too small for the 90SP (this is the size recommended for the 60SP). A 15.5x12 would be a better choice of 4-bladed prop.

I look forward to hearing how you get on.
Best regards
Laurenne