Re: 2000 175hp Johnson Ocean Pro
It wasn't an oil injection issue then (2000's didn't have a VRO), if there was oil in any one cylinder there was oil in the fuel going to all carbs. If there wasn't oil in #2 the #2 carb may have been plugged but the oil injection was working.
Anyway, the 175 is a 60* design and the 200 is a 90* design. Both loopers, both good motors, the 200 is heavier. Tough call. If it were me and I was looking for all out speed the 200 is the choice. All around use & economy and I was happy with the 175 performance on that particular hull, I'd probably fix the 175.