Boat

Have Boat Questions? Ask a Boat Repair Expert.

Connect one-on-one with {0} who will answer your question

Related Boat Questions
I have a boat with a mercruiser 4.3 thunderbolt. It will not
I have a boat with a mercruiser 4.3 thunderbolt. It will not fire. I have checked spark plugs and they are fine. replaced distributor cap, rotor and coil.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I own a 2000 bay liner. It has a 4.3 liter thunderbolt
Hello Jason I own a 2000 bay liner. It has a 4.3 liter thunderbolt ignition it's a mercury mercruiser. I'm not getting a spark to my coil. My boat will turn over but won't start and I can't figure out… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
2003 4.3 mercruiser v6 test procedure in distributor
2003 4.3 mercruiser v6 test procedure for sensor in distributor and one for the module cranks but will not start… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Mercruiser thunderbolt v ignition module part # ***** 1251-1......
Mercruiser thunderbolt v ignition module part # ***** 1251-1...... Where do I buy a new one of these, how do I test the existing one, should I replace coil too. Basically after engine is warm, rpm's d… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
Have a 1994 Baja , Mercruiser 4.3 thunderbolt ignition , Have
Have a 1994 Baja , Mercruiser 4.3 thunderbolt ignition , Have power at the coil ( both sides ) But no power coming out , I have a solid purple wire up near the carb that doesn't go anywhere but shows … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Pulled the flame arrestor off carb and created a spark on my
Pulled the flame arrestor off carb and created a spark on my 4.3 mercruiser with thunderbolt ignition. Now I have no power at all. No ignition, no lights, no horn, no bilge pump ect.… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
Anybody have a lead on where to purchase an ignition module
Anybody have a lead on where to purchase an ignition module for a Mercruiser Thunderbolt IV?… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
what is the voltage readings at the wht/grn and wht/red wires
what is the voltage readings at the wht/grn and wht/red wires on thunderbolt ign. module o 1989 mercruiser 4.3 175 hp… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a 1987 4.3 mercruiser ,thunderbolt 4 ignition ,2 barrel
I have a 1987 4.3 mercruiser ,thunderbolt 4 ignition ,2 barrel carb, it runs good for about 45 minutes than goes dead , no spark . let it cool down overnight and it runs good for 45 min. I put a new s… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a 92 Sea Ray with a Mercruiser 4.3 V6 with Thunderbolt
I have a 92 Sea Ray with a Mercruiser 4.3 V6 with Thunderbolt ignition. The problem that I am having is when I am going across the water sometimes it seems to knock when I go to throttle up. It could … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I need to replace the coil on a Thunderbolt IV ignition system
I need to replace the coil on a Thunderbolt IV ignition system can I use a car coil or is the Mercruiser coil a must ?… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
i have a 1990 marlin boat with a 4.3 mercruiser with the thunderbolt
i have a 1990 marlin boat with a 4.3 mercruiser with the thunderbolt ignition can someone tell me what color wire gose where on the key switch there are four different colors purple,orange,yellow with… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
hi mal from new zealand here i have a v6 4.3 mercruiser that
hi mal from new zealand here i have a v6 4.3 mercruiser that is very hard on fuel and hard to start when hot i think that float level and timing may out do you have this info or any ideas cheers mal… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
Hello, I am repairing a 1988 mercruiser MCM 7.4 liter engine
Hello, I am repairing a 1988 mercruiser MCM 7.4 liter engine equiped witha thunderbolt IV ignition and would like to know if there is a correct procedure to time the motor due to the type of ignition.… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
Hey guys, I have an 03 Mercruiser 4.3 190hp in my boat. I
Hey guys, I have an 03 Mercruiser 4.3 190hp in my boat. I have a problem with no spark going to distributor. Figured that the ignition coil was bad, so replaced it, still nothing. While cranking the m… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
is there a diffrence between echlin ignition and thunderbolt
is there a diffrence between echlin ignition and thunderbolt ignition when it comes to distrib, cap and rotary button. cant get fire and just noticed they gave me echlin cap and button and i have thun… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
4.3 Mercruiser ThunderBolt Ignition Slave Solenoid clicks
4.3 Mercruiser: ThunderBolt Ignition Slave Solenoid clicks 1 time when trying to start Have 12 volts at SS have 12 volts at Starter good battery connections Can start by jumping across terminals on st… read more
Mike of Pompano Beach
Mike of Pompano Beach
Charter Fleet Maintenance
18 satisfied customers
What is the difference between a marine engine and a automotive
What is the difference between a marine engine and a automotive engine. Can a auto engine be converted for marine use. It is a GM 4.3 motor.… read more
Pappy's Sales and Service
Pappy's Sales and Service
Vocational, Technical or Trade Scho
586 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.

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:

Ted G.

Ted G.

Rigger, Diagnostician

1,074 satisfied customers

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

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

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

John White

John White

Marine Mechanic

306 satisfied customers

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

Jason

Jason

Marine Mechanic

18,955 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,406 satisfied customers

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

Jeff G.

Jeff G.

Marine Mechanic

4,730 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 >

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