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#11384236 - 02/01/16 02:47 PM Need some help!
blwn merc Offline
Outdoorsman

Registered: 05/15/14
Posts: 82
Loc: Weatherford , TX
I have a 2000' mercury 225 EFI. Here is what it's doing. It will start and idle just fine , rev up as high as I want it to go in neutral. Once I put it in gear , it struggles to plain off like it's starving for fuel. Once it does get up , about a minute later , it has very low power under 3000 rpm and once I take it over 3000 rpm it dies and just a few seconds later it will start back up , back under 3000 rpm . I have recently rebuilt the fuel pump , replaced the fuel filter and the spark plugs. I am lost as to what is going on. And the fuel pump was the " gravity fed " fuel pump. Not the electric fuel pump. I'm sorry if I don't know the correct term guys.

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#11385498 - 02/02/16 03:26 AM Re: Need some help! [Re: blwn merc]
OldFrog Offline
TFF Guru

Registered: 02/16/06
Posts: 48345
Loc: Probably not where you think
First thought I had was to check your lower unit.
Then I re-read your post.

How old is your fuel line? Do you have a water separator on it?
Primer bulb age?

How about checking fire on each cylinder?

What did the old plugs look like when you removed them? Any wet ones?
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Now, Donald...please pick John Bolton for your running mate.

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#11385657 - 02/02/16 07:42 AM Re: Need some help! [Re: blwn merc]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11127
Loc: Littlefield Tx & Lake A. H. US...
Ser. number? Sounds like a throttle position control problem, electric fuel pump screen in the VST. These motors the TPS is very sensitive.
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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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#11387229 - 02/02/16 04:24 PM Re: Need some help! [Re: blwn merc]
blwn merc Offline
Outdoorsman

Registered: 05/15/14
Posts: 82
Loc: Weatherford , TX
Fuel line is less that 2 years old. Yes it has a separator on it. Each cylinder does fire. When I replaced the plugs , all seemed to be burned normally. All 6 looked the same. No wet ones. I always run stabil with every fill up as well. I think I'm leaning toward an electrical issue from what Gary Purdy says.

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#11387321 - 02/02/16 05:11 PM Re: Need some help! [Re: blwn merc]
boatman025 Offline
Angler

Registered: 07/16/10
Posts: 481
Loc: McKinney
where you located I have shop in McKinney and could look at it for you
_________________________
Hughes Marine Service
McKinney ,Texas

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#11388915 - 02/03/16 11:40 AM Re: Need some help! [Re: blwn merc]
blwn merc Offline
Outdoorsman

Registered: 05/15/14
Posts: 82
Loc: Weatherford , TX
I live in Weatherford. I actually committed to a guy that has a shop in Alvarado. Since I already committed to him , that's where I will take it. But in the future I will keep you in mind.

Thanks!

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#11394235 - 02/05/16 11:27 AM Re: Need some help! [Re: blwn merc]
harvey walker Offline
Angler

Registered: 01/24/12
Posts: 374
Loc: waco
sounds like a bad fuel line from the tank to the motor.

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#11395939 - 02/06/16 05:24 AM Re: Need some help! [Re: blwn merc]
hopalong Online   content
Pumpkin Head

Registered: 09/06/08
Posts: 78478
Loc: drake river ranch telephone T...
power packs/coils? maybe?
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