It would seem some say there is a prop from a minn kota that bolts on well with no major mods , some it also seems say it doesn't do well as it dies when it hits the water , but the prop seems to be the least of the problems with this , some have taken to slightly modifying a transom bracket from a minn kota also , again one of the littler hassles , but this whole thing with a weed eater having very low torque seems to be the bogger boo and the part that needs to be over come.
Off course fuel tank size could be addressed in one of many ways.
I just figured someone here has maybe tryed this or something like it , with/without success.
My electric troller pushes my 10 foot jon around well , but ............ you know what happens , got to mess with success