I think power “ratings” are regional and probably a bit personal too!
I can assure that IMO 12 foot stacers perform just about right with a 30 2st . 40hp was a little hard to control but 30 is just right!
a 4.2 for mine will be wanting with a 30 once you’ve got it loaded up - the 70 was a bit tongue in cheek but I ran a rude 50 on a 3.9 for many years and it was powered about right. Many years ago one of the outer island lads won the Prince of Wales challenge in the Torres running a 4.2 quinny and modified merc 90 on the tiller… that thing proper flew.
At least mild steel rusts and leaves the ally mostly ok unlike stainless !!!


 
						
					 
					
					 Originally Posted by roverrescue
 Originally Posted by roverrescue
					

 
				 
				
				
				
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