Mercury 225 EFI spitting out fuel from exhaust

[Seatrek12]

Fuel spitting out the exhaust? I have a 1996 Mercury 225 EFI outboard. Motor starts and runs fine but get poor gas mileage (.8 MPG).

 

[Faztbullet]

Re: Mercury 225 EFI spitting out fuel from exhaust

Is low on power planing off? The 3.0L are bad about breaking reeds which it will run ok but be a little off on top end and a lazy low end. Check the basics first...compression, spark and if ok check fuel end (injectors & reeds).A DDT wont tell you much on this model.

 

[Seatrek12]

Re: Mercury 225 EFI spitting out fuel from exhaust

Is low on power planing off? The 3.0L are bad about breaking reeds which it will run ok but be a little off on top end and a lazy low end. Check the basics first...compression, spark and if ok check fuel end (injectors & reeds).A DDT wont tell you much on this model.

Thank you for the suggestions. I did a compression test and got 92lbs on all cylinders. I did not warm engine up? Changed sparkplugs, seems to stop gas spitting out. Not sure about GPH. What is acceptable compression LBS?
Thanks

 

[carholme]

Re: Mercury 225 EFI spitting out fuel from exhaust

From the manual:

COMPRESSION All Models – Using a fully charged
battery, throttle shutters wide open
and cylinder block warm
90 – 110 psi
(616.3 – 753.5 kPa)
Variance between cylinders should not
exceed 15 psi (102.7 kPa)

Check your PM.

Gerry

 

[Seatrek12]

Re: Mercury 225 EFI spitting out fuel from exhaust

Thanks Gerry, Dennis

From the manual:

COMPRESSION All Models ? Using a fully charged
battery, throttle shutters wide open
and cylinder block warm
90 ? 110 psi
(616.3 ? 753.5 kPa)
Variance between cylinders should not
exceed 15 psi (102.7 kPa)

Check your PM.

Gerry