I have a 225 johnson and I'm trying to get the right year but have no data plate and the welsh plug seems to be missing. I have done alot of research and know that Johnson did away with the 235 in 85 and replaced it with the 225 in 86. It would not be using a type 1 CD cause it does not have external lead connectors, but it still has 2 packs. I have an 88 225 that has a single pack instead of 2 so I think my motor is either an 86 or 87. My main questions are did the 87 use a single or double cd pack and whats the difference between the VRO and the VRO2. I know my 88 uses the VRO2 cause its labeled but they look identical. I see alot of post on here say you may be able to use the numbers off of the heads, CD packs or carbs to ID a motor how would you go about doing that exactly. Thanks for any help