Boat

Have Boat Questions? Ask a Boat Repair Expert.

Ask an Expert,
Get an Answer ASAP!

Boat

I have a 2005 Mercury Verado 4 stroke 25 Hp. two years ago I…

Customer Question
I have a 2005...

I have a 2005 Mercury Verado 4 stroke 25 Hp. two years ago I started having problems and replaced the defective pencil and all 6 Laser Iridium 1LFR6G 5588 plugs. replaced the new plugs in the spring before running it again, later that summer the same problem arose again, we changed the small pre filer and found another pencil defective and replaced it. This spring I replaced all 6 pencil coils and new plugs, new pre filter and the other filter requiring a special tool. and developed a problem when up and running at 5600 RPM, the boat runs great then suddenly it will loose 4 to 600 RPM &approx. a 1/4 mile it will go back to 5600 RPM. Note there has never been any other fuel additives other than Mercury # 1 #2 & #3 products. This has been done every time I refuel. I have been told there is another fuel filter that I have not changed! Where is this filter? Do I need to have the fuel checked for a small leak in the pressure or should I replace the fuel pump? Note the motor only has 531 engine hours.

Mechanic's Assistant: Just to clarify, can you actually see the leak?

No I have never found a leak from fuel anywhere on the motor and none of the boat marinas , I had the computer printout done and have not found the answer Thanks Ron Grove

Mechanic's Assistant: What is the model of your '05 Mercury?

The motor serial # 1B119824 year built 2004

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

No I have had it to 5 different marinas with no success with the problem

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I hope this is everything ,Thanks Ron

Submitted: 1 month ago.Category: Boat
Show More
Show Less
Ask Your Own Boat Question
Answered in 55 minutes by:
1/8/2018
Marine Mechanic: Charles, Marine Mechanic replied 1 month ago
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 4,085
Experience: US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
Verified

Hello, my name is***** will assist you.

Has any work been done to the FSM on your engine?

Ask Your Own Boat Question
Customer reply replied 1 month ago
I made a mistake on the HP it is not 25HP it is a 250 HP Mercury Verado, I was on the phone with a Mercury representative and he gave me three different things to check out while it is winter, check the fuel pickup supply lines in the gas tanks, the three block that come from the two tanks, have the Marina check the fuel pressure for a possible leak or pinched fuel line.and lastly the 3rd fuel filter part #8798856Q this will be replaced before going to the Marina for yearly service thanks Ron Grove
Marine Mechanic: Charles, Marine Mechanic replied 1 month ago

Those are good things to look at, especially the fuel lines from the boat to the engine. The part that I would be looking at is the float inside the fuel supply module on the rear of the engine. Since you seem to be dropping RPM while on plane, this would indicate to me that the float is sticking in the up position. This is causing you to run low on fuel, then the engine stumbles, drops RPM and causes the float to drop. When it does, the boost pump will then activate and fill the FSM and the engine will come back up to RPM.

When on the Mercury CDS at the dealer, it can be seen as the fuel count gets above 180 and the boost pump does not turn on and the float still shows high. This is the indication of a sticking float. There have been several float design changes since your engine came out.

Ask Your Own Boat Question
Ask Charles Your Own Question
Charles
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 4,085
4,085 Satisfied Customers
Experience: US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.

Charles is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

Ted G.

Ted G.

Rigger, Diagnostician

695 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

15,782 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,003 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,728 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

< Previous | Next >

Related Boat Questions
Would you please tell me how old this outboard is. Model #
would you please tell me how old this Johnson outboard is. … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,003 satisfied customers
I have a 2004 evinrude 200 hp, the check engine light came
I have a 2004 evinrude 200 hp, the check engine light came on, engine seems to run fine, I purchased a diagnostic program to find a failure code. The program loaded on laptop no problem, but can't oep… read more
Shane
Shane
Technician
High School or GED
1 satisfied customers
Have a 1979 15 foot forester rebel with a 140 hp merc
have a 1979 15 foot forester rebel with a 140 hp merc outboard how do you start it?? … read more
Shane
Shane
Technician
High School or GED
1 satisfied customers
I have a lms 335 now on my boat but I want to change it to
I have a lms 335 now on my boat but I want to change it to hds 5 gen 2 do they have the same thing so I don't have to start over it again and also will it hook up the same … read more
Charles
Charles
Marine Mechanic
4,085 satisfied customers
I have a 25 HP Yamaha that got drenched with seawater while
I have a 25 HP Yamaha that got drenched with seawater while running I got it home and washed it down removed the plugs and drained the carby and gave it as good a clean out as I could poured a little … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
Looking at a Bayliner 2858 with 560 hours on a 7.4L MPI 310
Looking at a Bayliner 2858 with 560 hours on a 7.4L MPI 310 HP mercruiser. Wondering if the hours are high enough that I should look elsewhere? Am I going to need a new engine soon if I buy it? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
250 Merc Optimax stall at 600 RPMS, 250 Merc hard to start
250 Merc hard to start wont stay running, stalls at 600 RPMS, stall when put into gear … read more
Charles
Charles
Marine Mechanic
4,085 satisfied customers
I have a fuel injected 130 hp honda...engine wont turn up
i have a fuel injected 130 hp honda...engine wont turn up under load or no load past 1500. sounds like it is hitting the rev limiter at hat rpm … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
What is the torque pattern and lbs for a Indmar 350 exhaust
What is the torque pattern and lbs for a Indmar 350 exhaust manifold and riser. I have a2000 Malibu ski boat… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,003 satisfied customers
I currently own 997c and purchased one of the new AIS
I currently own 997c and purchased one of the new AIS radios. I can't find a wiring diagram showing the leads from the 997c to connect to the AIS radio … read more
Charles
Charles
Marine Mechanic
4,085 satisfied customers
Looking for a 200 hp sportjet engine and wondered if a 3.0
looking for a 200 hp sportjet engine and wondered if a 3.0 liter mercury outboard would work … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
I have a Sea Ray 360 with twin inboard mercruiser 8.1s. Just
I have a Sea Ray 360 with twin inboard mercruiser 8.1s. Just tried to “dewinterize”. Gene started and water flow was great. The two 8.1s started fine but neither one had water exiting the exhaust. Sea… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
1994 200hp Venom, J200STLERK. I am trying to remove the
1994 Johnson 200hp Venom, J200STLERK. I am trying to remove the power head. Everything is disconnected, and I have removed 4 bolts and 1 nut from each side, and a nut between the exhaust outlet. When … read more
Shane
Shane
Technician
High School or GED
1 satisfied customers
My anchor winch doesn't work anymore! I let all of the
i let all of the anchor rope out and it started to operate backwards. then it stopped completely. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
I have twin engines in my boat I just bought, they are mer
I have twin engines in my boat I just bought , they are mer cruisers … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
900 3seat. It's a jetski. It has 1 bad piston. I have a new
It's a jetski. It has 1 bad piston. I have a new piston with a new cylinder, i need to replace the pistón and cylinder and i need help with how to put the cylinder head back on correctly. … read more
timoto
timoto
Bachelor's Degree
72 satisfied customers
Running hot, Mechanic changed water pump at my home. It ran
running hot, Mechanic changed water pump at my home. It ran OK on the trailer using ear muffs. I ran it in the river and the tattle tale water stream was strong at high speeds. Upon returning to the d… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
Trim on motor works but the throttle and front dash only
Hi. Trim on motor works but the throttle and front dash only raises. … read more
Charles
Charles
Marine Mechanic
4,085 satisfied customers
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.

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.

Show MoreShow Less

Ask Your Question

x