"Wow, how many 170/470's d
"Wow, how many 170/470's did Merc sell I wonder?
Seems like they are the most common engine on this site needing some kind of help.
You may want to consider dropping in a 220 hp 4.3 V-6. It should fit, and should work with your existing drive. Your leg ratio should be 1.84, right?
You will need to get a Y pipe exhaust collector, and relocate your front engine mounts. Most of the plumbing should work, and the standard 10 pin engine plug will plug and play as far as wiring goes. Does your 470 use the 10 pin plug?
What year is it?
You may be able to find a complete 4.3 engine package on ebay, or a marine salvage outfit.
The 4.3 package will weigh a little more, but you get 50 more hp for your trouble.
Rod"