4 blade prop for shallow water ???
 

Does anyone know if someone makes a 4 blade prop for a 1993 Honda 4 stroke? Im not sure if it is a 9.9 or 10hp, it belongs to a friend. Aluminum or stainless would be ok. The motor runs good as it is with the original 3 blade prop on a 14 ft jon boat. He fishes on a very shallow river and wants to do some experimenting. He wants to see if he can get the boat on top of the water quicker and run in a bit shallower water. I know its a small motor to be talking about on this forum but we are looking for any suggestions to get it running shallower. Thanks for any replies.