???-----Lawnboy power mowers ( OMC product ) were loop charged in the mid 1950's.-----And JOHNSON / EVINRUDE both had the 55 HP triple in 1968 as well.
These 2 units shift different.------The 78 shifts to forward with an UP motion of the shift rod.----Model numbers of the 2 motors?----Do the shift rods look identical?
????---Vapor separator was used on the 60 degree V-6 beginning in 91 and on the V-4 model 60 degree motors beginning in 95 model year.----Very common item !
The hole just allows air / fuel mixture into the by pass area before going into the cylinder.----Direct charge was a " marketing term " to fool folks that direct charge was nearly equal to " loop charging " I believe.
I believe the factory seals use a stainless metal casing.--Not all seals are stainless.----Proper bore interference fit as well.----I also dislike seals that are covered with rubber all over.
Myself I prefer using the original 2 seals back to back.-----This newer seal and installation is detailed / shown in many parts diagrams.----Say for a 2000 mode 50 HP 2 stroke.
