40hp upgrade to 60hp?
I am looking to upgrade from my 40hp four stroke on a 4.5 metre ribeye as it strugles to get above 22knots, I have repropped and experimented with and without a dol fin.
Any suggestions/advice gratefully recieved. I have a leed on a rebuilt 6Ohp fourstroke
Should I take the plunge or can I upgrade my present engine?