I have this ad also....What always concerned me was the claimed horsepower rating for both engines. Especially the Victa. It does not state whether the Hurricane is the 125 or not though.

A claimed horsepower rating of 3.6hp for the 3rd generation Victa engine is close. So with tweaks or increased transfer capacity and an adjustable or larger main jet might get it to 5hp...but a first generation Victa 125? I dunno. I dont recall any additional work carried out on the industrial/marine or tigers other than variable jets....Anyone know how they got 5hp? By the time power was transfered to the prop,then water resistance,id reackin it would be luck to make 2hp....Any thoughts?