I am currently running a 90 hp johnny on a 19ft alum boat,which correlates to about 35-37 mph.How much difference would a 112 spl make,top end,,,hole shot etc.Are the 112s a good motor,,do not mind mixing gas,do that already.My brother has a 17ft glass boat,and he is running mid 40's with a 1995 Rude 115. Are the 112s and the 115s basically the same motor,without the oil injection.Any and all info much appreciated.