99 Mercury 225 EFI ????

[adm1476]

I’m installing a 99 Mercury 225 EFI on my boat. Never has a fuel injected outboard before. Obviously it is oil injected also. So my question is would there be any benefit or harm from running a small amount of oil in the fuel? On all my other outboards which were all carbureted, I mixed the oil a little heavy. My thought was a little extra lube never hurt. But with EFI not sure if this is bad for the injectors etc?

 

[The Force power]

I’m installing a 99 Mercury 225 EFI on my boat. Never has a fuel injected outboard before. Obviously it is oil injected also. So my question is would there be any benefit or harm from running a small amount of oil in the fuel? On all my other outboards which were all carbureted, I mixed the oil a little heavy. My thought was a little extra lube never hurt. But with EFI not sure if this is bad for the injectors etc?

99 Mercury 225 EFI on my boat. Never has a fuel injected outboard before. Obviously it is oil injected also. ------A fuel-injected 2-stroke??


my other outboards which were all carbureted, I mixed the oil a little heavy. My thought was a little extra lube never hurt---- Running Extra oil on a 2-stroke would foul the plugs quicker & pollute the lake, so yes it does hurt.

 

[GA_Boater]

Mixing oil in the fuel is counterproductive, In an injected Merc, yes there is such a thing, oil is injected into the crankcase for lubrication and raw fuel is injected into the cylinder for combustion.

 

[Dukedog]

Mixing oil in the fuel is counterproductive, In an injected Merc, yes there is such a thing, oil is injected into the crankcase for lubrication and raw fuel is injected into the cylinder for combustion.

thinking his maybe regular efi motor, not an opti/dfi...???

 

[adm1476]

GA boater thank you! As you can tell I don’t know much about the workings of these fuel injected motors. I did not realize that oil was injected into the crankcase. Now that makes perfect sense. So adding oil in the fuel will do nothing. Thanks again!

 

[Dukedog]

you haven't said which motor you have???

is it a regular efi motor or an Optimax? tha opti is tha direct injection but tha normal efi is a not.. this makes a big difference

 

[Dukedog]

guess ya don't know, huh?.. maybe don't care if information is bogus or not???