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Author Topic:   1997 Mercury 225 EFI

farmlife posted 06-02-2008 04:34 PM ET (US)
[Seeks] general information on [a 1997 Mercury 225 EFI outboard]. [I] have just purchased one. Are they reliable? [What is the] fuel consumption [of a 1997 Mercury 225 EFI]? I am quite new to this type of motor. The [1997 Mercury 225 EFI] has done 126 hours, [and it] has been well serviced. [The] compression [has been] tested.
Bella con23 posted 06-02-2008 07:23 PM ET (US)
I have a 1999 225 Mercury EFI hanging on a 23 Conquest. I find the motor to be very predictable in that it starts every time and performs well over the entire RPM range. It does like gas and oil at just under 2 miles to the gallon at 4000 rpm burning 16 gallons per hour.
I have had minor problems such as the oil reserve fill check valve was replaced. Actually that is the extent of the problems. I replaced the water pump last season and everything look and felt fine on this motor with just under 400 hours clocked.
I don't particularly like the clunking in and out of gear, but these stainless steel props are very heavy. Checking the lower unit oil and magnet revivals no more then expected metal, so I'm not to concerned.
Hope this helps -
Joe
jimh posted 06-02-2008 10:18 PM ET (US)
The 225-HP Mercury EFI motors are classic two-cycle motors which have been enhanced with electronic fuel injection. Electronic fuel injection helps give them good starting and frees you from having to continually prime the fuel system. The fuel injection electronics have some sensors for temperature and barometric pressure which help to adjust the fuel mixture for altitude and temperature variations. They tend to be easier to start than some ancient unsophisticated carburetor motors.
The fuel economy of these engines will be typical for two-cycle motors and will probably be in the range of 0.55 to 0.6 lbs/HP-hour.
The reliability and repair of these motors will be typical for a Mercury. The water pump needs frequent service. The stators are often problematic. The motor mounts can be a problem.
farmlife posted 06-03-2008 12:05 AM ET (US)
thats great thanx guys it answers alot of what i was wondering this motor is on a 5.7mtr glasskraft so im hoping i should get some pretty good performance but in saying that should i consider trim tabs as well or will it be ok with just permatrim i know probably another remedial quest but i am quite new to boating and outboards again thanx for ur help cheers Rob
Tohsgib posted 06-03-2008 11:18 AM ET (US)
Better get your wallet out...that engine is gonna suck down some liters of fuel son! About 85 per hour at wide open throttle. Better drive slow being gas is more expensive than Steinlager.

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Author	Topic: 1997 Mercury 225 EFI
farmlife	posted 06-02-2008 04:34 PM ET (US) [Seeks] general information on [a 1997 Mercury 225 EFI outboard]. [I] have just purchased one. Are they reliable? [What is the] fuel consumption [of a 1997 Mercury 225 EFI]? I am quite new to this type of motor. The [1997 Mercury 225 EFI] has done 126 hours, [and it] has been well serviced. [The] compression [has been] tested.
Bella con23	posted 06-02-2008 07:23 PM ET (US) I have a 1999 225 Mercury EFI hanging on a 23 Conquest. I find the motor to be very predictable in that it starts every time and performs well over the entire RPM range. It does like gas and oil at just under 2 miles to the gallon at 4000 rpm burning 16 gallons per hour. I have had minor problems such as the oil reserve fill check valve was replaced. Actually that is the extent of the problems. I replaced the water pump last season and everything look and felt fine on this motor with just under 400 hours clocked. I don't particularly like the clunking in and out of gear, but these stainless steel props are very heavy. Checking the lower unit oil and magnet revivals no more then expected metal, so I'm not to concerned. Hope this helps - Joe
jimh	posted 06-02-2008 10:18 PM ET (US) The 225-HP Mercury EFI motors are classic two-cycle motors which have been enhanced with electronic fuel injection. Electronic fuel injection helps give them good starting and frees you from having to continually prime the fuel system. The fuel injection electronics have some sensors for temperature and barometric pressure which help to adjust the fuel mixture for altitude and temperature variations. They tend to be easier to start than some ancient unsophisticated carburetor motors. The fuel economy of these engines will be typical for two-cycle motors and will probably be in the range of 0.55 to 0.6 lbs/HP-hour. The reliability and repair of these motors will be typical for a Mercury. The water pump needs frequent service. The stators are often problematic. The motor mounts can be a problem.
farmlife	posted 06-03-2008 12:05 AM ET (US) thats great thanx guys it answers alot of what i was wondering this motor is on a 5.7mtr glasskraft so im hoping i should get some pretty good performance but in saying that should i consider trim tabs as well or will it be ok with just permatrim i know probably another remedial quest but i am quite new to boating and outboards again thanx for ur help cheers Rob
Tohsgib	posted 06-03-2008 11:18 AM ET (US) Better get your wallet out...that engine is gonna suck down some liters of fuel son! About 85 per hour at wide open throttle. Better drive slow being gas is more expensive than Steinlager.