Car

Ask a mechanic online and get answers to your car questions

Ask an Expert,
Get an Answer ASAP!

Story, I'll try to make short. Bought a project boat last…

Customer Question
Long story, I'll try to...
Long story, I'll try to make short. Bought a project boat last year, gutted and restored the deck and interior. Motor is a 1986 Mercury 140 3.0. Replaced the starter, carburetor, head gasket, plugs and wires. Started it up two days ago, ran great, took it to the lake for the first time. Ran fine, pulled the kids on a tube, everything seemed fine. Started noticing a hesitation when I accelerated and then it would run fine. Evening comes, head back to the dock. Kids want to swim so I stop a few hundred yards away. Go to leave, engines cranks and cranks but won't fire. Finally starts running just enough to limp within 30 feet of the dock and dies, have to paddle back in. Get it home and start to check everything out. It has fuel, streams shoot out the carb when it is throttled. It has compression, 150 or close on all 4 cylinders. It has spark but it looked a bit weak. Replaced the coil. Replaced distributor cap, rotor and points. Still won't fire. Put starter fluid straight in the plug holes, still nothing. Pull a plug to test spark again and the engine fires and runs, runs rough but it runs. I can pull out any plug and leave it attached to the wire, or not, the engine will run. Put all 4 in and it won't start. Pulled out the distributor, doesn't seem damaged. Pulled the timing cover and the gears appear to be lined up. I'm stuck.
Submitted: 8 months ago.Category: Car
Show More
Show Less
Ask Your Own Car Question
Answered in 5 minutes by:
9/13/2017
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago
Kalamykid
Kalamykid, Shop owner/ Tech.
Category: Car
Satisfied Customers: 5,202
Experience: I HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. I HAVE THE TOOLS AND SOFTWARE TO ANSWERE ALMOST ANY Q
Verified

When you did the compression test, did you have all the plugs out?

Ask Your Own Car Question
Customer reply replied 8 months ago
I believe so. I've messed with it so much I honestly can't remember.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Can you redo the compression test, but this time remove all the plugs?

Ask Your Own Car Question
Customer reply replied 8 months ago
I'm at work now. Can I do it tomorrow and contact you after? Also I replaced the head gasket before this happened, you thinking it might have blown again?
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Yes you can come back to this chat screen for as long as we need to be able to solve this problem. It is possible that it has. The compression test will tell us more.

Ask Your Own Car Question
Customer reply replied 8 months ago
OK, talk to you tomorrow, after I check the compression, thanks.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Chat with you tomorrow.

Ask Your Own Car Question
Customer reply replied 8 months ago
OK, checked them this morning with all the plugs out. Cylinder 1 = 151 2= 149 3 = 130 4 = 138
Decent drop on 3 but that should still fire shouldn't it?
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

There would be a good miss, but it should run unless there is a bad valve. Did you have a valve job done on the head when you had it off?

Ask Your Own Car Question
Customer reply replied 8 months ago
No I just replaced the gasket and put the head back on. But it was running great afterwards until it just died.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Can you send me a pic of the engine please so I can see what engine you have?

Ask Your Own Car Question
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Can you get one of the valve train with out the valve cover on?

Ask Your Own Car Question
Customer reply replied 8 months ago
On the road now, I'll have to take it tonight.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Thank you. Chat with you tonight.

Ask Your Own Car Question
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Can you back all the rockers off two full turns and redo the comp test p!ease?

Ask Your Own Car Question
Customer reply replied 8 months ago
At work now. I'll be home tomorrow until 3PM central. Would it be better to start tomorrow morning and just give you a call or does the chat work better for you?
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

If you want a phone call, that is ok with me. If I am right, the valves are just to tight and need to be readjusted.

Ask Your Own Car Question
Customer reply replied 8 months ago
hope you're right. I'll give it a try tomorrow.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Do just the comp test please and let's see what it tells us.

Ask Your Own Car Question
Customer reply replied 8 months ago
Cylinder 1 = 130 2= 130 3= 130 4= 100 Checked #4 three times got 100 each time
Customer reply replied 8 months ago
I noticed the intake on #4 was a lot looser than the rest. I tightened it up a full turn and rechecked the compression and got 130
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Then you need to readjust all of them and let's see if we can got 150 on each of them. Here us the best way to adjust them.

Ask Your Own Car Question
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Turn the crank so both valves are closed on the cylinder you are adjusting. Back so the rockers off three full turns. With o email hand roll the push rod back and forth, slowly tighten the rocker back up till the push rod just stops turning. Then turn the nut 1\2 turn more and go to the next rocker. Make sure the valve is closed that you are doing. Then recheck all the cylinders again and let's see what you get.

Ask Your Own Car Question
Customer reply replied 8 months ago
Just so I get this right. I think you got some typos here.
Back so the rockers off three full turns. With o email hand roll the push rod back and forth, slowly tighten the rocker back up till the push rod just stops turning.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Sorry. I am using !y tablet and the dang auto correct messes me up. With one hand roll the push rod.

Ask Your Own Car Question
Customer reply replied 8 months ago
got it thanks
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

You are welcome.

Ask Your Own Car Question
Customer reply replied 8 months ago
150. 142. 142. 135.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Sorry for the delay, I am trying to get an engine in myself. The numbers came up like I hoped, but ,,4 is still to low. I hate to say it, but go back over cylinder 4 valves and readjust them one more time and see if it will come up a little bit more. It is close, but I would like to see it up to at least 140.

Ask Your Own Car Question
Customer reply replied 8 months ago
Finally got back to it today. I had to play with it a bit but cylinder 4 is reading 140 now. If I tighten it just a quarter turn more though it won't even give me a reading on the compression gauge.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Have you tried to run it at all? It should be good to go now.

Ask Your Own Car Question
Customer reply replied 8 months ago
I tried it this morning and it didn't start but the battery is pretty low from the compression tests. I'm going to charge it all day and try after work tonight or tomorrow morning.
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Let me know what it does.

Ask Your Own Car Question
Customer reply replied 8 months ago
Been working too much, finally got back to it today. Still won't start, sounds the same as before. I'm sure you know more about this than me but it was running great and then just wouldn't start anymore. How would the valves have that effect on it? Could they have come loose that quickly. Seems to me something must have broke or come loose or something for it to just stop running. What am I missing?
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Do you have some carb cleaner?

Ask Your Own Car Question
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Remove the air cleaner and spray a good amount into the carb and see if it will start.

Ask Your Own Car Question
Customer reply replied 8 months ago
Tried it. Still won't start. It's a brand new (rebuilt) Carb. I just bought it and put it on before taking it on the water. Plus if it wasn't getting any fuel why would it run on 3 cylinders?
Auto Mechanic: Kalamykid, Shop owner/ Tech. replied 8 months ago

Do you have spark on all 4 cylinders? Can you try to start it again, then pull, the plugs and send me a pic of them so I can see the tips?

Ask Your Own Car Question
Was this answer helpful?
Ask Kalamykid Your Own Question
Kalamykid
Kalamykid
Kalamykid, Shop owner/ Tech.
Category: Car
Satisfied Customers: 5,202
5,202 Satisfied Customers
Experience: I HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. I HAVE THE TOOLS AND SOFTWARE TO ANSWERE ALMOST ANY Q

Kalamykid 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:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

Paul MCorpus Christi, TX

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Technician

1,243 satisfied customers

16 years of experience

Ted G.

Ted G.

ASE Certified Technician

1,724 satisfied customers

20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness

George H.

George H.

ASE Certified Technician

1,537 satisfied customers

ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist

GM Tech (Cam)

GM Tech (Cam)

Auto Service Tech

669 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Amedee

Amedee

Former ASE Master Tech

2,520 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Jerry

Jerry

Master Mechanic

2,181 satisfied customers

ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager

Richard

Richard

ASE Certified Technician

1,000 satisfied customers

12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes

< Previous | Next >

Related Car Questions
Bentley Supersport Windows Wont go up. 2017. I had two
I had two mechanics here tell me that the regulator needs to be reset … read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
The warning light on my 2013 Altima says" MAintenance -
The warning light on my 2013 Altima says " MAintenance - Tire" but the tires are inflated properly. What to do? … read more
jim
jim
Vocational, Technical or Trade Scho
702 satisfied customers
I own a GLE coupe 2016, and a month ago my mechanic replaced
I own a GLE coupe 2016, and a month ago my mechanic replaced the right front strut and the sway bar because it was making a noise, after breaking a wheel hitting a big road hole, but, inmediately afte… read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
I was driving about less then 10 miles an hour and my 08 G6
I was driving about less then 10 miles an hour and my 08 G6 drove straight into water about to the end of the door, I pushed the car off to the side and tried Turning it on about 5 hours later and it'… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
I have a 2006 fusion 2.3L, my code reader indicts that the
I have a 2006 fusion 2.3L, my code reader indicts that the intake manifold runner control stuck open bank 1, I've replaced both control modules but had little effect … read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
I was talking with a mechanic and got cut off. 2007 Honda
I was talking with a mechanic and got cut off. JA: What is the model/year of your Honda? Customer: 2007 Honda Fit JA: Are you fixing your Fit yourself? What have you tried so far? Customer: No JA: Any… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
Kind of in a situation here. My wife is 150 miles away with
Hello kind of in a situation here. My wife is 150 miles away with a horse trailer and horses. The 2015 Chevy Duramax is giving her alerts to Service the emissions system and it is speed limited. Befor… read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
Radio/nav display went dead and won't come back. this was 2
radio/nav display went dead and won't come back. this was 2 days ago. … read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
Hyundai sonata 2010 noticed this broken on car what is it?
Hyundai sonata 2010 noticed this broken on car what is it? Some kind of connection will add a picture its right of the altanator center valve has nothing connected to it and appears broken… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
I have a 2007 HONDA FIT the D on the dash is flashing. I
I have a 2007 HONDA FIT the D on the dash is flashing. I hooked up an OBDII sensor and it says code UO121 FCAN malfunction. I changed the transmission pressure switch down by the bottof the dipstick, … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,253 satisfied customers
Replacing the water pump on a 2000 E320. Parts came with 2
Replacing the water pump on a 2000 E320. Parts came with 2 gaskets - one is thin rubber and fits inside the housing of the water pump - the other is plastic and aligns with the holes of the water pump… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,253 satisfied customers
Warnning light filter is at risk of clogging. On the
warnning light filter is at risk of clogging JA: Just to clarify, what are the exact lights you're talking about? Customer: on the dashboard yellow triangle JA: What is the model/year of your Peugeot?… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
We have a 2008 Kia Sedona with 59K miles. This week the
Hi. We have a 2008 Kia Sedona with 59K miles. This week the check engine indicator light started flashing, the car was difficulty driving and we smelled burning rubber. We pulled over, called a tow tr… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,253 satisfied customers
I have a 2004 Lincoln navigator in good condition and
I have a 2004 Lincoln navigator in good condition and service is up to date. Yesterday I got gasoline and started to drive and the RPMS WHEN HIGHER BEFORE THE TRANSMISSION MOVED INTO THE NEXT GEAR A S… read more
Expert
Expert
29 satisfied customers
2014 hyundai.When turng left. When turning left I hear a
when turning left I hear a sqeak from the front. 2014 hyundai tuscon … read more
Eric
Eric
Auto Technician
589 satisfied customers
2002 infiniti i35. Misfire on cylinder 4. Possible causes
2002 infiniti i35. Misfire on cylinder 4. Possible causes and fixes, please.also which is cylinder 4? Thanks.… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,253 satisfied customers
I have a 2014cadillac wagon. I pulled out of my driveway
Hello. I have a 2014cadillac wagon. I pulled out of my driveway tonight and pressed the gas pedal. It started to hesitate and slow down as I gave it gas. Then the traction control and stability lights… read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
Can anyone help me find out the following Range Rover HSE
Hi, can anyone help me find out the following Range Rover HSE engine number as soon as possible? Thanks. ***** SALGS2SV3JA502776… read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
554 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