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We have a 2004 mercury 40 hp efi engine on our pontoon boat…

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we have a 2004 mercury...
we have a 2004 mercury 40 hp efi engine on our pontoon boat that stalls after it warms up. we have replaced the water separator fuel filter, the spark plugs, the gray fuel line with squeeze pump from gas tank to motor and have put in new gas. the motor starts up fine and you can do 3- 50 yard circles, but when the motor bets warm it stalls. you can start it up again, but when you put it in gear it stalls. I have a service manual for our 40 hp four stroke efi and it shows that there should be a high pressure fuel filter but I cannot locate it. The local boat gods in our area have checked everything that I did and said that everything looks ok to them, but something is wrong. there is no trouble shooting section in my service manual. Any help is appreciated. Michael Vandenhoy.***@******.***
Submitted: 3 years ago.Category: Boat
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6/24/2015
Marine Mechanic: Charles, Marine Mechanic replied 3 years ago
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 4,890
Experience: US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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Hello my name is***** will be assisting you today.Do you know if the high pressure filter has ever been replaced?
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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