MERCURY VST

[MIKE COLLIER]

I've finally found the proper VST pump for my Merc / 60 / four stroke. I see the pump referred to as BOOST PUMP, LIFT PUMP, HIGH PRESSURE PUMP etc. Really now, what is it? thanks

 

[alldodge]

VST stands for Vapor Separation Tank and was used in the first generation EFI motors. The tank is like that of a carburetor but does not vent outside the tank. The low pressure pump pumps fuel into the tank, where the high pressure pump is located inside.

 

[alldodge]

Should also add, that I'm not an OB guy, so not certain of both pumps are in the one tank, my guess is no. If I had a serial number could try looking it up at boatinfo