I’d absolutely say (from horrible past experience personally and knowing of many others who suffered the same), that you should almost certainly do away with the oil injection system on that engine anyway. Wouldn’t normally say such a thing about most other injection systems on mercs and Yamaha engines…but that particular engine and the other similar engines in the v6 black max bracket, are just simply infamous for failing. Unless you are religiously and rigorously removing, replacing and checking all the components on the system. Most other systems you can get away with just checking and maintaining the oil lines and fittings. But on those the pump drive itself can simply randomly give up the fight without too much warning.
Since my first one of these failed on me decades ago…any of the handful I’ve had since and currently have had the system done away with in favour of pre mixing the fuel. Quite sure most old school merc guys will likely agree…mostly. 50-1 for a normal v6 of that era and a little richer for the XR models
