Boat

Have Boat Questions? Ask a Boat Repair Expert.

Ask an Expert,
Get an Answer ASAP!

Boat

I have a 1973 Mercury 40hp outboard that is pull start, not

Customer Question
electric start. I am not...
I have a 1973 Mercury 40hp outboard that is pull start, not electric start. I am not getting spark and would like to know where to look and what to test to find my problem.
Submitted: 6 months ago.Category: Boat
Show More
Show Less
Ask Your Own Boat Question
Answered in 21 minutes by:
7/13/2017
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago
Tan
Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 11,108
Experience: 40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.
Verified

Hello, I'm Tan. Welcome to JustAnswer. I'm reviewing your question and will reply momentarily.

Ask Your Own Boat Question
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Could I get the engine serial number please?

Ask Your Own Boat Question
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

ok got to the switch box and disconnect the salmon colored wire.The switch box is the one that the ignition coil green wires connect to.

Ask Your Own Boat Question
Customer reply replied 6 months ago
Ok. Sorry took so long. I was away from motor. Now I can look directly at it. I disconnected the salmon wire from the switchbox.
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Do you have spark? If yes then you have a bad stop switch or tilt switch.

If no then we have to test the stator and the trigger voltage outputs to the switch box. This will require a peak reading volt meter or DVA adapter to do these tests.

Ask Your Own Boat Question
Customer reply replied 6 months ago
What do I do next?
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Do you have spark? Do you have a spark gap tester to check spark at the spark plugs?

If yes then you have a bad stop switch or tilt switch.

If no then we have to test the stator and the trigger voltage outputs to the switch box. This will require a peak reading volt meter or DVA adapter to do these tests.

Ask Your Own Boat Question
Customer reply replied 6 months ago
No spark
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

If no then we have to test the stator and the trigger voltage outputs to the switch box. This will require a peak reading volt meter or DVA adapter to do these tests.

Do you have either of these?

Ask Your Own Boat Question
Customer reply replied 6 months ago
I have a gap tester and I don't get any spark jumping even a 1/16 of a gap
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago
If no then we have to test the stator and the trigger voltage outputs to the switch box. This will require a peak reading volt meter or DVA adapter to do these tests.Do you have either of these?
Ask Your Own Boat Question
Customer reply replied 6 months ago
I have a multi meter
Customer reply replied 6 months ago
Which do you want me to test first?
Customer reply replied 6 months ago
Does it need to be analog?
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

No you can use the DVA adapter with a digital meter.

The green wire coming from the stator to ground. Disconnect the greem wire from the switch coming from the stator.Crank the engine what is your voltage reading.

Ask Your Own Boat Question
Customer reply replied 6 months ago
Green wire from the coil?
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Did you read my last statement?

Ask Your Own Boat Question
Customer reply replied 6 months ago
I have a blue and a red wire
Customer reply replied 6 months ago
I have a wire that comes from the coil back to ground.
Customer reply replied 6 months ago
I don't see any ground wire from the stator, only the blue and red wires.
Customer reply replied 6 months ago
Do I need to reconnect the salmon wire? Or do I leave disconnected?
Customer reply replied 6 months ago
Across the front of my switchbox, I have orange, salmon, white, red, blue wires. The green wires are the ones on either side of the switchbox.
Customer reply replied 6 months ago
That order is if you look from front of motor, left to right.
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Ok test the red wire to ground then the blue wire to ground. These wires need to be disconnected for this test. This is a cranking test.

Ask Your Own Boat Question
Customer reply replied 6 months ago
Hello?
Customer reply replied 6 months ago
Ok. Delay in responses. Sorry
Customer reply replied 6 months ago
Disconnect the red and test to ground? Then reconnect and do same with the blue wire?
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Correct. These are peak voltage readings.

The site is having issues moving real slow. So bear with me.

Ask Your Own Boat Question
Customer reply replied 6 months ago
Ok
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Keep me posted to your findings.

I hope I’ve provided the information you were seeking. If you are happy with my service, your 5-star rating at this time is most welcome. If you need more help, please let me know so l can continue to assist you.

Ask Your Own Boat Question
Customer reply replied 6 months ago
53 on the red, 9.2 on the blue
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

What meter are you using? Peak reading or the DVA adapter.

A standard multi meter will not read correctly.

Ask Your Own Boat Question
Customer reply replied 6 months ago
I will have to find a new dva. Mine must be broken.
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago
Ask Your Own Boat Question
Customer reply replied 6 months ago
But I will have to wait to get it. I don't have a store around me readily available with one on the shelf. Ordering one will take a week to get it. I will have to continue after I get it.
Customer reply replied 6 months ago
What should I be looking for within range for those wires?
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Blue to engine ground. 180-400 peak volts and Red to engine ground 25-100 peak volts.

Then you want to test the trigger wires brown to white 0.5+ peak volts. All these test are done wires disconnected and cranking the engine.

If these test good then you have a bad switch box.

Follow up questions are always welcome.

Thank you......Tan

I hope I’ve provided the information you were seeking. If you are happy with my service, your 5-star rating at this time is most welcome. If you need more help, please let me know so l can continue to assist you.

Ask Your Own Boat Question
Customer reply replied 6 months ago
Ok. Thank you for the info. I will get back to you with any other questions.
Marine Mechanic: Tan, MerCruiser Certified Technician replied 6 months ago

Your welcome.............Thank you..............Tan

Ask Your Own Boat Question
Ask Tan Your Own Question
Tan
Tan
Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 11,108
11,108 Satisfied Customers
Experience: 40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Tan 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

11,108 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 don't know how to explain, this is for 2 year old df40
Hi i don't know how to explain, this is for 2 year old df40 house power 4 stroke suzuki, when you put up throttle on power the engine start to choking.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
Flemming again again here from DK. Firing up my Mercruiser
Hi Jason, Flemming again again here from DK. Firing up my Mercruiser 4.3 V6 is a succes, only I have an issue I'd like to run by you. When firing up I get sparks from the distributor case to the carbu… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
We're on a Bav 40, 2002 model which has a Volvo Penta MD2030
We're on a Bav 40, 2002 model which has a Volvo Penta MD2030 engine. It has about 1100 hours on it. New fuel pump & mixing elbow 3 yrs ago. Recently, we changed the primary and secondary (racor) filte… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
I have a 1988 four winds 160 freedom. 3.0. my first. Again,
Again, my 88 four wimns 160 . First time out put it in reverse backed up from dock and tryed to put it in forward and it would not come out of reverse. Is there a simple reason wh… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
BF60A outboard, has had O2 sensor replaced because check
BF60A outboard, has had O2 sensor replaced because check engine light had come on twice, reader confirmed this was fault. It still will not reach full revs at times and when it does it drops back to 4… read more
Boat Doc
Boat Doc
144 satisfied customers
I have a 15hp mercury 2cy that will go to high speed
I have a 15hp mercury 2cy that will go to high speed intermittently. It runs great otherwise. Low speed is smooth and so is high when it decides to go there … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
Which standard is maximum power rating calculated to for a
Which standard is maximum power rating calculated to for a Suzuki 150Hp Outboard. Model D150? … read more
Charles
Charles
Certified Mercury Tech
4,034 satisfied customers
My 1994 200V6 Yamaha outboard run out of oil due to a faulty
My 1994 200V6 Yamaha outboard run out of oil due to a faulty oil level sensor in the outboard tank not activating the oil supplyfrom the filler tank. The motor died while running at 75% speed. It is s… read more
Charles
Charles
Certified Mercury Tech
4,034 satisfied customers
I have a 2002 125hp mercury outboard. It has a toggle kill
I have a 2002 125hp mercury outboard. It has a toggle kill switch. Im wanting to replace the kill switch and ignition. Is the current kill switch a 3 wire or 2 wire. If 3 wire, can i replace with a 2 … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
Need to install a new Throttle Linkage Kit by wednesday. I
Need to install a new Throttle Linkage Kit by wednesday. I have the kit, and understand what the end result should look like but a step by step would be helpful … read more
Charles
Charles
Certified Mercury Tech
4,034 satisfied customers
Ering a Bertram Purchase and switching from Freshwater Lake
ering a Bertram Purchase and switching from Freshwater Lake usage to Salt Water … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
Flemming from DK here. So now I'm almost done with the
Hi Jason, Flemming from DK here. So now I'm almost done with the wiring on the engine, that you very succesfully helped me with. I'm looking at the switchboard and ignition key now. Quick question, is… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
15,782 satisfied customers
I have a 1993 Yamaha outboard 2 stroke. Which is only
Hi I have a 1993 Yamaha outboard 2 stroke. Which is only running on two of the three cylinders … read more
Charles
Charles
Certified Mercury Tech
4,034 satisfied customers
I have recently purchased a second hand boat which has a
I have recently purchased a second hand boat which has a HDS5X fitted but I cannot get the split screen to disappear, could you please give me some advice. … read more
Charles
Charles
Certified Mercury Tech
4,034 satisfied customers
I have an issue with my 1998 25hp NMO Autolube Yamaha. It
Hi I have an issue with my 1998 25hp NMO Autolube Yamaha. It has a backfire/sneeze on tick over only, it is fine through the rest of the power range. I have taken the carbs off had them fully cleaned … read more
Charles
Charles
Certified Mercury Tech
4,034 satisfied customers
Is there a bow thruster that will work on a sea ray 240 sun
Is there a bow thruster that will work on a sea ray 240 sun deck? Can it be installed where boat is stored?… read more
Boat Doc
Boat Doc
144 satisfied customers
I've got a 2006 5.0 mpi with 500 hrs on it. It had new
I've got a 2006 5.0 mpi with 500 hrs on it. It had new manifolds and risers 12 months ago, 40 hours use since. Have noticed rough idle and needs a bit of throttle to start, then low power on take off … read more
Boat Doc
Boat Doc
144 satisfied customers
Iwant to install a bow thruster on my Sea Ray 240 OB, 2015.
Iwant to install a bow thruster on my Sea Ray 240 OB, 2015. Will it work? Do you recommend it? … read more
Charles
Charles
Certified Mercury Tech
4,034 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