Re: What engines will work with290 Outdrives
About any engine can work as long as you can find a Y pipe (or go through the transom aka noisy) for the exhaust, a flywheel cover to fit the engines for that type of drive, and enough room between the engines for your newer style engines, along with replacing gears in the drive with proper ratios for what ever you want.
Lots of possibilities, all it takes is money.
What did you have in mind?