Boat

Have Boat Questions? Ask a Boat Repair Expert.

Ask an Expert,
Get an Answer ASAP!

Suzuki df 70 serging at 2800 RPMs. I have replaced the

Customer Question
Suzuki df 70 serging...

Suzuki df 70 serging at 2800 RPMs

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so the Marine Mechanic can help you best.

I have replaced the Injector pump and spark plugs .plugs showed signs of too rich fuel .Tried it out started fine but serges At 2800rpms

Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Is there anything else important you think the Marine Mechanic should know?

Engine serges @ 2800 rpms

Submitted: 8 months ago.Category: Boat
Show More
Show Less
Ask Your Own Boat Question
Answered in 11 minutes by:
11/18/2017
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 17,835
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
Verified

Hello my name is ***** ***** am I speaking with? I read what you wrote, is there a story or history to this engine. Have you ever personally seen it run correctly? How old is the fuel itself? Are you capable of checking things like engine compression, spark output, and fuel pressure?

Ask Your Own Boat Question
Customer reply replied 8 months ago
The boat has run well in the past. Just put in new fuel 97 octane ethanol free and Lucas injector cleaner New plugs new injector pump starts great runs great up to 2800 rpms and that’s when the serving starts when I lower the rpms it stops. Plugs were black with foul
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago

W​hen was the last time it ran correctly exactly, are we talking last week or 2 years ago? Are you able to check things like engine compression, spark output, and fuel pressure?

Ask Your Own Boat Question
Customer reply replied 8 months ago
It ran well 3 months ago but would not start that’s when I had to replace the fuel pump. I do not have the ability to check any of those thingd
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago

I​f you are not able to check those things then this isn't likely something you can fix yourself. How is it I can be of help to you, what kinds of questions did you have for me?

Ask Your Own Boat Question
Customer reply replied 8 months ago
Thank you I will probably have to take it to a mechanic
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago

Ok​ay no problem, if you do end up having a question for me after speaking with your mechanic feel free to reply back any time.

Ask Your Own Boat Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a marine mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Dominick Your Own Question
Dominick
Dominick
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1,009
1,009 Satisfied Customers
Experience: 25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

Dominick 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

703 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

17,835 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,179 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
I have a 2000 suzuki DF70 outboard. It was running fine when
I have a 2000 suzuki DF70 outboard. It was running fine when the RPM's began to drop off, from 5000 rpm to 4000 max, to 3000 etc. until finally will not run. it acts as if it wants to start but will n… read more
Jason
Jason
Marine Mechanic
17,835 satisfied customers
2000 DF 70 Suzuki: Had old fuel. Replaced both filters,
2000 DF 70 Suzuki: Had old fuel. Replaced both filters, vaper separator, plugs. Have pressure at injectors and seam to have good pattern. Blead air from fuel system. Fresh non ethanal gas. Problem is … read more
Jason
Jason
Marine Mechanic
17,835 satisfied customers
I have a 2008 suzuki df 90 Engine runs fine at idle to about
I have a 2008 suzuki df 90 Engine runs fine at idle to about 2500 rpms then it surges and backfires The tank was drained and cleaned all the fuel filters were changed The ball was changed along with a… read more
Jason
Jason
Marine Mechanic
17,835 satisfied customers
My Suzuki 2007 DF 140 misfires at 2800 rpm after changing fuel/water
My Suzuki 2007 DF 140 misfires at 2800 rpm after changing fuel/water separator & fuel hose. Went out & bought new fuel/water separator, new fuel hose & a new primer bulb. Sitting at the dock, I push t… read more
Jason
Jason
Marine Mechanic
17,835 satisfied customers
I have twin 1998 4.3efi1 engines with 460 hrs. 1 engine runs
I have twin 1998 4.3efi1 engines with 460 hrs. 1 engine runs fine untill it gets to about 2800 rpm, then it misses and backfires thru the throttlebotty. I have used a scan tool and it shows no codes a… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,179 satisfied customers
2004 df 115 suzuki getting large amount of fuel in crank case
2004 df 115 suzuki getting large amount of fuel in crank case stumbles on top end for a liitle bit then comes on and runs fine pulled a vacum on low presure fuel pump shows good diapram checked compre… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,179 satisfied customers
Aloha from Hawaii. I have twin 70 hp Suzuki four stroke engines.
Aloha from Hawaii. I have twin 70 hp Suzuki four stroke engines. Both are around 12 years old and have around 1200 hrs on them in salt water. Both have been running fine til now. As I was trolling hom… read more
Noel
Noel
Marine mechanic
Diploma
44 satisfied customers
I have a 1993 chris craft 23 w/ the 5.8l omc; 2 years ago,
I have a 1993 chris craft 23' w/ the 5.8l omc; 2 years ago, it began running very rich - it was actually like dumping fuel. 3 mechanics said it was stuck injectors; 2,000.00 later, nope; Bought a used… read more
Jason
Jason
Marine Mechanic
17,835 satisfied customers
i have a suzuki df 70 it is on a older boat i do not have the
i have a suzuki df 70 it is on a older boat i do not have the rpm guage to go by, but the exaust manifold seems to getting really hot to the touch i have replaced the waterpump thermostate,and water v… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,728 satisfied customers
My 70 hp outboard runs OK up to 2500 rpm and then if you try
My 70 hp outboard runs OK up to 2500 rpm and then if you try to push it over that it sputters at 3000 and then will run up to 4500 for a second or two and then back down to 3000. If you back off to 25… read more
Jason
Jason
Marine Mechanic
17,835 satisfied customers
I have a Suzuki DF(NNN) NNN-NNNNand I just changed the spark plugs
I have a Suzuki DF(NNN) NNN-NNNNand I just changed the spark plugs and fuel filter. My question is this, when I ran it up in my yard ,hooked up to the water hose, I t ran fine all the way to 5000 rpm … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
hello I HAVE A SUZUKI DF(NNN) NNN-NNNNLAST WEEK I HAD TO REPLACE
hello I HAVE A SUZUKI DF(NNN) NNN-NNNNLAST WEEK I HAD TO REPLACE A SPARK PLUG, NOW WHEN ENGINE IS RUNNING IT IS FINE UP TO 4000 rpm, BUT WILL NOT GO OVER 4000rpm THERE ARE NO LIGHTS ON NOW BUT THERE W… read more
Jeremy R
Jeremy R
1,069 satisfied customers
are the ecu of a suzuki df 70 and df 90 like, may i put on
are the ecu of a suzuki df 70 and df 90 like, may i put on a ecu from a df 90 to a df70? mvh marius… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,179 satisfied customers
I have a 2003 suzuki df 140 outboard. It overheated yesterday
I have a 2003 suzuki df 140 outboard. It overheated yesterday and dropped my rpm to a max of 2000,I was trying to outrun a thunderstorm in very rough seas for a few miles. I never har rpm"s above 5500… read more
Jeremy R
Jeremy R
1,069 satisfied customers
I have a 2006 Suzuki DF200. It is losing power, I had the injectors
I have a 2006 Suzuki DF200. It is losing power, I had the injectors cleaned, new filters, (all of them) tank cleaned, new fuel lines, VST tank cleaned, new plugs, and new low pressure fuel filter. It … read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,728 satisfied customers
I have a 2007 Suzuki 70 hp outboard. When I try to give throttle
I have a 2007 Suzuki 70 hp outboard. When I try to give throttle it will cut out and sputter at 30000 rpms. It's feels like a car when running out of gas. Thanks, Mickey… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,476 satisfied customers
one of my suzuki 2 cycle 140hp motors looses power and then
one of my suzuki 2 cycle 140hp motors looses power and then tries to regain it when over 3000rpm At full throttle it only reaches 3500 rpm I have swapped fuel pumps with my other motor with no help I … read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
Boat 2002 Crownline Engine 5.0 L MPI 305 CID Serial #
Boat: 2002 Crownline Engine: 5.0 L MPI 305 CID Serial #: 0M372591 Hours: 149 Recent Maintenance: New Plugs, Distributor Cap & Rotor, replaced fuel filter, inspected and cleaned spark arrestor, vacuum … read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 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