2007 EFI four stroke mercury outboard need help(maybe bulb??) please

[mustangpool]

hey guys need some help please got the boat out last week and took it to the lake. the boat will only run about half speed at full throttle and after a couple of minutes it starts to fowl out and die. bought new plugs and added a fuel injection cleaner and replaced fuel filter. battery was also bad. picked up new battery and went out again today with the same results. any ideas on what i should look for???

 

[Silvertip]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

How long had it been since you last used it? If longer than a couple of months did you add a fuel system treatment? Doing it after storage is not a solution. Does the boat have a water separating fuel filter? Is there water in the fuel. How old is the fuel?

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

i hadnt used the boat since last year.i had add stabil to it before i garaged it. this year i went ahead and dumped the old gas and ensured the tank (portable) was clean. and removed the gas filter and pumped fresh gas up to it. in front of that is a aluminum case, im assuming a resevoir where the fuel pump is. at the bottom of it is a drain in which i also opened and drained. if there is a water seperater i do not know where it is or what it looks like. again as far as the symptons. if i hooks a waterhose up to the motor and run in the yard it will run it will run 20 to 30 minutes with no problems what so ever as far as i can tell. but on the lake it seems to only run at half speed as if it is bogged down. then eventually within a few minutes it starts to act like it is flooding out and then dies. it will restart a few times then stops completely. and i have to let it set for a while til it will start again. my first impression was it was just bad gas or water somewhere but i thought surely we would be past that by now?????

 

[Don S]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

Would this be a 25hp or a 225hp motor. They are kind of different.
Do you have the serial number handy?

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

yes this is a 25 hp serial number is OR175687

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

the aluminum case just forward of the fuel filter i assume is the resevoir that holds the fuel pump. should i try and take the top off and ensure that there are now screens inside that are plugged up? or if i take the shrader out of the top of the injecter manifold and turn the key on will this pump gas out to chech flow?

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

ok new peice of info may or may not be good. just went out and pulled my cowling to see how bad i could screw myself. anyhow i removed the gas filter again and checked the bowl for trash. found none. i pumped up my bulb and it wont get hard. i pulled the quick connect from the tank and checked it and found nothing of concern but when i put it back on it seemed to go on further.(may or may not of not for sure) after putting it back on i tried to pump gas back it the fuel filter bowl but it only fills half way then stops. bulb still does not get hard. pulled the gas line from the motor side of the quick connect and repumped bulb and have a good steady stream of gas but when reconnected it wont fill the fuel filter bowl. could this simply be a bad bulb or fuel line?????

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

ok guys here is the latest i pulled the resevoir with the fuel pump and sure enough it was full of varnish and the screen was clogged. cleaned all that up and took to lake. same results. came back and pulled injector manifold and checked. top injector has good spray. second injector has half spray. and third injector has none. is there a way to clean the injectors or do i have to replace them and if so how or how much does this cost????

 

[Don S]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

Yes, they can be cleaned. What you need to understand, is that every component in the fuel system is also varnished. As that varnish breaks down, it will makes it's way to the injectors.
Cleaning what can be cleaned, and replacing the fuel lines that are after the filters is a must if you don't want to keep sending the injectors out.
Things to clean, the VST, the fuel pumps, filters, coolers, etc.
Here is a company I have used often. Have sent them injectors for outboards and IO's. Excellent service and never a failure after nearly a hundred injectors, Then send you a report of before and after test results and install new injector filters.

Flagship Marine Engines Co., Inc.
200 E. Ann St.
Punta Gorda, FL 33950-6006
Ph: 1-888-282-2840
Website: www.flagshipengine.com

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

thanks don. i have already pulled the filters cooler and pumps but i need to buy fuel lines tomorrow. i thought i might just be as easy to buy new injectors while im there. and was curios what they cost i could not find them it the parts page or on line.

 

[Don S]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

i thought i might just be as easy to buy new injectors while im there.

Rebuilding is $50 each plus freight the injectors are $250 or more EACH, not sure of the current price for them. Your choice.

EDIT: Just checked, they are around $120 each, not 250.

 

[SparkieBoat]

Re: 2007 EFI four stroke mercury outboard need help please

Re: 2007 EFI four stroke mercury outboard need help please

I have heard of other places that do it for $20 per injector.

 

[sdsaw]

Re: 2007 EFI four stroke mercury outboard need help(maybe bulb??) please

I've used this company for injector cleaning and recalibrating.
Very satisfied with their communication skills with before and after test results
http://www.brucatosvs.com/fuel_injector.html

 

[mustangpool]

Re: 2007 EFI four stroke mercury outboard need help(maybe bulb??) please

well here is the latest i soaked the injectors in fuel injecter gas addidtive all night. this afternoon i blew them out with compressed air and b 12. two of the three are clear and spraying good. the third is screwed. local dealer will order me one tomorrow for 111.00

 

[SparkieBoat]

Re: 2007 EFI four stroke mercury outboard need help(maybe bulb??) please

I would recommend having the other 3 flow tested