Boat

Have Boat Questions? Ask a Boat Repair Expert.

Ask an Expert,
Get an Answer ASAP!

Boat

My 2003 Tohatsu 4hp won't start - flicker of oil pressure

Customer Question
light though. Pulled the spark...
My 2003 Tohatsu 4hp won't start - flicker of oil pressure light though. Pulled the spark plug (grounded it to engine block) and don't get any spark. Disconnected the brown wire (kill switch) still no spark. What should I try next?
Submitted: 1 month ago.Category: Boat
Show More
Show Less
Ask Your Own Boat Question
Customer reply replied 1 month ago
6hp not 4hp
Answered in 1 hour by:
10/13/2017
Marine Mechanic: Jason, Marine Mechanic replied 1 month ago
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 16,289
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
Verified

H​I Brian, my name is***** exciter coil, pulser coil, and ignition coil all need to be tested with a volt meter. Do you have a decent quality DVOM and do you know how to take resistance measurments?

Ask Your Own Boat Question
Customer reply replied 1 month ago
Thanks for the quick response. Yes, I have one and know how to use it.
Marine Mechanic: Jason, Marine Mechanic replied 1 month ago

There are 4 parts to the ignition system as a whole. There is the exciter coil, which provides the voltage to run thee system. A pulser coil, which provides a trigger signal. A CD box, which is like the ignition systems brain box, and finally the ignition coil itself. Every part is directly testable with a meter except for the CD box itself. What you do is test everything else around the box. These are pass or fail tests, and they will either read within specification or they will not. If you get a part that does not pass/meet the specified resistance, you simply replace it and move on. If all parts pass, then by deduction, you would have a bad CD box. I'm attaching a page from the factory service manual that covers testing these components. It will tell you the wire colors and the specifications for each part. On this page there will be a spec for what is called a "lamp coil". You can ignore that one. A lamp coil is part of the battery charging system, and it wouldn't effect the spark output. All you need to do is test the 4 components with your meter. If they all pass, it's a bad CD box. If any one of them fail, you replace the part that is out of spec. Does that all make sense. The file I am uploading for you will show up at the very bottom of this response as an attachment. Simply click on it to save/print it out. I do want to make sure you are happy with my service before you go. If you had a further question on the issue by all means feel free to ask. If not, Just in case you do not understand the way the website works (and some folks do not). You do have to put forth a positive rating in order for it to credit me for helping you. When ratings are not done, the website simply keeps your deposit and they will not credit me. The ratings box is located at the top of the screen. To rate, you must select the star you wish and also confirm it. Please let me know if you run into any problems or errors when trying to do it. If you do have a problem, or if you can not see the ratings box which is at the top of the screen. Please reply back "I rate Jason's service _______" and fill in the blank.

Please note that our question sessions never close out, so if you need to come back later down the road with follow up questions to the issue, you can do so at any time, even after putting through a rating.

Thanks in advance, and good luck
Jason

Ask Your Own Boat Question
Marine Mechanic: Jason, Marine Mechanic replied 1 month ago

It looks like you read my answer and left without selecting a rating for my service, replying back, or simply thanking me. Was there something else?

Ask Your Own Boat Question
Marine Mechanic: Jason, Marine Mechanic replied 1 month ago

H​I Brian. How did you make out?

Ask Your Own Boat Question
Ask Jason Your Own Question
Jason
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 16,289
16,289 Satisfied Customers
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.

Jason 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

691 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

16,289 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

10,957 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
Twin 3406E 800 hp engines, under 700 original hrs Both
Twin 3406E 800 hp engines, under 700 original hrs Both produce STEAM which increases at higher rpm Clean oil analysis: no glycol..etc All gauges steady and normal Perfect performance except steam. All… read more
Cat Man
Cat Man
Vocational, Technical or Trade Scho
2,990 satisfied customers
Have a 997 unit. freezes up about every hr. will not shut
have a 997 unit. freezes up about every hr. will not shut off. have to diconnect power and restart. ?? … read more
Matthew John
Matthew John
Cert II Electronic Engineering
39 satisfied customers
I have a 1998 225 ocean runner that I bought. It was running
Hi, I have a 1998 johnson 225 ocean runner that I bought. It was running fine when I picked it up. It was in the back of my truck on its side for a week before I installed it. … read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
My HDS 8 lost the color palete & has horizontal black lines
My HDS 8 lost the color palete & has horizontal black lines moving from top of screen to bottom..help … read more
Matthew John
Matthew John
Cert II Electronic Engineering
39 satisfied customers
I have twin 175 hp mercurys I was told there 1989s the
i have twin 175 hp mercurys I was told there 1989s the serial #'s are ob304322 and ob304329 can't find those #'s on any list … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
10,957 satisfied customers
My HDS 10 will come on but not respond and keeps cycling on
my HDS 10 will come on but not respond and keeps cycling on and off? how do I fix … read more
Matthew John
Matthew John
Cert II Electronic Engineering
39 satisfied customers
My 1994 evinrude 50hp tilt/trim drifts down. How do I fix
my 1994 evinrude 50hp tilt/trim drifts down. How do I fix it? … read more
Jeremy Ewell
Jeremy Ewell
Owner/Mechanic
Tohatsu Certified Technician
0 satisfied customers
I will type the summary of my problem and paste it here in a
I will type the summary of my problem and paste it here in a few minutes … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
10,957 satisfied customers
I have a 50 hp 2006 merc. elpt efi outboard. that is only
i have a 50 hp 2006 merc. elpt efi outboard. that is only turning 4800- 5000 rpms and burning a lot of fuel. i have recently replaced the high pressure pump filter, plugs ,oil and filter, and foot oil… read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
My HDS-8 no longer powers up when I press start, though it
My HDS-8 no longer powers up when I press start, though it occasionally gives me a Lowrance startup screen. … read more
Matthew John
Matthew John
Cert II Electronic Engineering
39 satisfied customers
Need to know how to operate the toilet. Just need to know
Just need to know how to operate the toilet Jabsco electric flush not sure how to turn on the in-line valves for operation on the water … read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
I am planning on replacing the hydraulics on my boat its the
I am planning on replacing the hydraulics on my boat its the Seg Star HC 5358 and I see all the replacements are the 5388-3 is the a new model ? and do I need any special tools … read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
I need an inline fuel filter for Mercury 90 horse command
I need an inline fuel filter for Mercury 90 horse command thrust … read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
My Suzuki 140hp outboard (4 stroke) keeps throwing the oil
Hey, my Suzuki 140hp outboard (4 stroke) keeps throwing the oil pressure light and rev light when I throttle back abruptly. … read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
I have a Humminbird Helix7 Chirp DI GPS G2 depthfinder and I
I have a Humminbird Helix7 Chirp DI GPS G2 depthfinder and I would like to get an iceducer for icefishing this winter. What iceducer ? I have looked online & found one for Helix7 except DI ? Is my uni… read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
I have a 1990 Donzi 300 with twin 5.0 Volvo Pentas and am
Hi I have a 1990 Donzi 300 with twin 5.0 Volvo Pentas and am having trouble getting one motor operating correctly. The boat is in Oceanside. Can I drive it to San Diego.. about 35 miles.. on one engin… read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
Need wiring diagram for solenoids on 70hp mercury outboard
need wiring diagram for solenoids on 70hp mercury outboard 1989 … read more
Jason
Jason
Marine Mechanic
16,289 satisfied customers
Changing seals between halves on a alpha gen 2, how much end
changing seals between halves on a alpha gen 2, how much end play should be on the lower half shaft that mates to the upper, this one seems to have a lot of end play for a 2014 with a 100 hours … read more
Matthew John
Matthew John
Cert II Electronic Engineering
39 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