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Dec 30th, 2023
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 04 Mercury 225 EFI question
#12107440
02/22/17 11:34 PM
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Joined: Jan 2014
Posts: 576
ShallowWaterKing
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2014
Posts: 576 |
My 225 EFI runs fantastic top end and and at quick idle but anything below 5mph it's wanting to die, it won't keep a idle very well at low rpm. Any ideas from past experience? I've ran fuel out out new fuel and sea foam in it checked the Bubble and it's tight at the low idle. Any help??
Thanks !
Champion Boats
Amphibia Eyegear - amphibiaeyegear.com
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"Practice is key to this game"
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Re: 04 Mercury 225 EFI question
[Re: ShallowWaterKing]
#12107493
02/23/17 12:19 AM
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Joined: Apr 2010
Posts: 774
TxFisherman03
Pro Angler
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Pro Angler
Joined: Apr 2010
Posts: 774 |
Is it idling really rough? mine just did this. was told it is the air compressor
Byron
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Re: 04 Mercury 225 EFI question
[Re: ShallowWaterKing]
#12107595
02/23/17 01:23 AM
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Joined: May 2014
Posts: 925
skeeter james
Pro Angler
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Pro Angler
Joined: May 2014
Posts: 925 |
I had a 99 mercy efi 225 and I bet it had a kazillion hours on it... was a good strong motor, still running good when I sold it..
Formerly known as progator james
2013 Skeeter FX21 with a 250 SHO... Love this boat!!
James Moore
214-458-8024
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Re: 04 Mercury 225 EFI question
[Re: ShallowWaterKing]
#12107949
02/23/17 05:16 AM
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Joined: Mar 2010
Posts: 2,884
DKennimer
Extreme Angler
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Extreme Angler
Joined: Mar 2010
Posts: 2,884 |
I would start with new plugs (correct plugs) gapped properly and a new water separator filter. This usually helps a lot on these EFI motors.
From there:
Compression test
When was the last time the injectors and induction system was cleaned and tested?
Reeds (a chipped Reed or pedal not seating will cause this)
Check fuel pressure at idle, 15, 30 and 60 seconds after shutdown (record readings)
Pulse fuel pump
Exhaust tuner clogged
A good certified Merc tech should be able to diagnose and repair. That's what I would do.
It could be as simple as adjusting the idle screw... Have the TPS checked.
Good luck!! Get it fixed by a certified Mercury Tech before something major goes wrong.
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Re: 04 Mercury 225 EFI question
[Re: TxFisherman03]
#12144874
03/17/17 03:10 AM
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Joined: Jul 2006
Posts: 6,046
Fast Lane
TFF Celebrity
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TFF Celebrity
Joined: Jul 2006
Posts: 6,046 |
Is it idling really rough? mine just did this. was told it is the air compressor 04 EFI doesn't have an Air compressor. Optimax has a compressor.
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Re: 04 Mercury 225 EFI question
[Re: ShallowWaterKing]
#12145102
03/17/17 12:11 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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Re: 04 Mercury 225 EFI question
[Re: ShallowWaterKing]
#12145264
03/17/17 01:55 PM
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Joined: Jul 2014
Posts: 86
H2O.crank
Outdoorsman
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Outdoorsman
Joined: Jul 2014
Posts: 86 |
My 250 does the same thing at idle, but I noticed if I trim the motor up it will idle much better. You might try that.
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Re: 04 Mercury 225 EFI question
[Re: ShallowWaterKing]
#12145272
03/17/17 01:58 PM
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Joined: Sep 2003
Posts: 5,519
Bruce's
TFF Celebrity
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TFF Celebrity
Joined: Sep 2003
Posts: 5,519 |
Plugs and check the air filter
Bruce's Sprinkler Repair
817-798-7246
52 years experience
State Licensed Irrigation
LI0017483
Fishing Texas lakes one at a time
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