And just to fill in the blanks... I'm in the process of re-powering my project boat. A 1962 Glasspar Citation (17') that is a resto-mod fun boat. It has a 4-stroke Honda on it now, and that will be replaced by a 2-stroke Tohatsu. Going from wimpy 50 HP 4-stroke with mediocre TQ down low to likely 90 HP 2-stroke with a real hole shot and mid-range power. the Tohatsu is 90 cu in too, so the motor is not under a lot of stress.
Things I found about 4-stroke, is that they growl instead of whine. They are no less noisy at speed than a good old 2-stroke. They have a LOT more moving parts. Modern fuel injected 2-strokes are fairly fuel efficient when throttled back.
I started life working in the boat yards and I'm well into my 60's now. Been doing boat stuff all my life up to marine engineering. I fell for the 4-stroke hype and went Honda as they have a sterling reputation. Will never do that again. Motor is OK, well built and all, but 4-strokes do not make the same kind of power and I don't like listening to them.
I want 25 kts over the bottom for long runs like Lake Chelan, Lake Powell, etc. I could do it with the Honda, but I'd be over 4,000 the whole way. That's a tiring sound to listen to for hours on end. With the 90, it'll be throttled back to 3,000 for the same speed so will sound much more relaxed and the fuel hit will be like 6% more - big deal ... Meanwhile I have a much more aggressive leave, way more top end if I want it, and more amps out of the alternator the whole way
In your motor size, 2-stroke may be iffy... But in any case I'd look at Tohatsu. They started life as commercial motors for Asian fishermen and watermen. They built a stellar reputation world wide. They have zinc plated internal cooling system passageways and stuff others just do not.
I went looking on the 'Net for negative comments about each of the brands as I went down the list. Merc is having a lot of negative issues with powerhead replacements. So that pushed me on to Evinrude...
Many "not covered under warranty" for fuel injectors for not winterizing correctly and "bad gas" stuff, etc. Also some are loosing the water cooled engine management units and they are really pricey... E-Tec injectors are $500 a pop and they usually want to change them all out - ouch.
In most cases I think it's the Fuel Feed Pump (FFP) that is going bad and not feeding the injectors enough pressure or even flow... FFP's are cheap by comparison, so I'd always change that first.
And I think that some non-ethanol gas with a shot of TCW-3 is what I'd run through the fuel system before I put it away for winter. Say a can of True-Fuel and let the motor run at high idle until a whiff of smoke, shut it off and put it away...
Bottom line is that 1.) you need a fuel/water separator in the boat a head of the motor filters, and 2.) because of the fuel line resistance with additional filtration, you may need to add an in-line low pressure booster pump to keep the motor happy, and 3.) get all the warranty coverage you can. Buy extended warranty's if they offer them. It'll add cost, but just factor that in.
Figuring a boat build is tricky, but satisfying. There are some side by side tests of 4-strokes and 2-stroke Yammies on YouTube. Go see what you can find in your HP rnage... Good luck and have fun