heyland toad,max engine size?

hey lads..
got meself a dinghy, a heyland toad,did her all up nice and neat..thinking of parting with a few bob for a small outboard for her only i cant find out what the max engine size she would take...seeing as these are a fairly popular large punt,said id ask see if any of ye know...
cheers...

I hazard a guess at a 4hp or something like that. Any spec sheet for them?

I hazard a guess at a 4hp or something like that. Any spec sheet for them?

cheers for the reply jim...there is a spec sheet online that mentions nothing about engine size tho...beam length weight etc...