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Max Online: 36273 @ 01/23/13 02:34 PM
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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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#11385657 - 02/02/16 07:42 AM Re: Need some help! [Re: blwn merc]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10512
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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#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: 353
Loc: McKinney
where you located I have shop in McKinney and could look at it for you
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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: 335
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
Super Freak

Registered: 09/06/08
Posts: 74332
Loc: manager, drake river ranch (fo...
power packs/coils? maybe?
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