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I just installed new yanmar 3jh40 in my boat. Brand new
Brand new Yanmar 3JH40 in my boat will not start.Have power to panel.when touching cable from positive battery to stud on starter starter is energized but no contact with ring gear. Alarm at panel sounds continually. … read more
Yachtwork
Yachtwork
Marine Engineer
Technical or Trade School
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Got a YM 3GM30 on my 1980 30 ft sailboat. 2 engine on key
Hi! Got a YM 3GM30 on my 1980 30 ft sailboat. 2 engine on key switches - one on cabin and one in cockpit. But cockpit tachometer doesn't work. Sensor on fly wheel bad? Green and white pickup wires bac… read more
Jason
Jason
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I am looking to purchase a trawler with twin Yanmar 100 hp
I am looking to purchase a trawler with twin Yanmar 100 hp turbo charged diesel. I am concerned about the oil consumption. One engine uses a quart of oil every 46gal of fuel/qt and the other 78gal/qt.… read more
Jason
Jason
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I have a yanmar 4jh4-te. When running from 2000 to 2400 rpm
I have a yanmar 4jh4-te. When running from 2000 to 2400 rpm my temp alarm “ chirps “ on and of. I have used my laser thermometer to check temp on all engine components and everything checks out at 160… read more
Jason
Jason
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I have a sailboat currently over in Europe with a 160HP Yanmar
I have a sailboat currently over in Europe with a 160HP Yanmar 4LHA-HTP engine. The boat is 5 years old and has approximately 800 hours on the engine. All recommended annual service work has been done… read more
Jason
Jason
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Vocational, Technical or Trade School
20,412 satisfied customers
im considering buying a 1968 Cheoy Lee Mark II. How difficult
im considering buying a 1968 Cheoy Lee Mark II. How difficult is it to replace the original volvo engine with a new or rebuilt Yanmar?… read more
Jason
Jason
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Vocational, Technical or Trade School
20,412 satisfied customers
I have a 53hp diesel engine in my sailboat. The manual says
I have a 53hp diesel engine in my sailboat. The manual says to remove the water pump to change the impeller. I can't; one of the engine mounting brackets is preventing me from removing one of the reta… read more
Jason
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Hello, I am Bob and I have a 2002 Sunseeker Camargue 44 with
Hello, I am Bob and I have a 2002 Sunseeker Camargue 44 with twin Volvo TAMD740PA 6 cylinder turbo diesels. 1.65 tranny. 24 x 29 Clements props #2462 Question: Our max RPM is 2600 RPM. This boat is ad… read more
Jason
Jason
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I have a question about a Yanmar 4LHA-DTP/DTZP diesel engine.
I have a question about a Yanmar 4LHA-DTP/DTZP diesel engine. What are each of the fuel lines on the top of the filter on the engine? I am assuming one line comes from the primer pump and then a line … read more
Jason
Jason
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Ive lost my key for a yanmar 4jht2 diesel after 2 years of
I've lost my key for a yanmar 4jht2 diesel after 2 years of no use.how do I start it without the key and what should I do to protect the engine when and if it starts… read more
Jason
Jason
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Vocational, Technical or Trade School
20,412 satisfied customers
I have seen pictures of experienced boaters pointing a pistol
I have seen pictures of experienced boaters pointing a pistol shaped diagnostic tool at a marine engine. What does this tool tell them? What diagnostic tools of this nature do you recommend? I have a … read more
Jason
Jason
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Vocational, Technical or Trade School
20,412 satisfied customers
My Yanmar 4LHASTP engine smokes heavily on accelleration. I
My Yanmar 4LHASTP engine smokes heavily on accelleration. I have tested the injectors, I cleaned the inter-cooler, I cleaned the turbo. No improvement. Could it be an openstuck wastegate?… read more
Jason
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Vocational, Technical or Trade School
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Hi,I am looking at getting a Yanmar 4LHA STP.Ithas been overheated
Hi,I am looking at getting a Yanmar 4LHA STP.Ithas been overheated & the owner thinks that it may have picked up on 1 cylinder.Are parts available to repair this & are they very expensive?Also it will… read more
Jason
Jason
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I have 38 foot Mathews (1936 Trunk Cabin -Wood) Boat it
Hi- I have 38 foot Mathews (1936 Trunk Cabin -Wood) Boat it weighs 26000 pounds plus and has a semi displacement hull- it will have two engines (diesel) - What size would be most efficient and still g… read more
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Jason
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There is a corroded component to my Yanmar 4JH2E (1990) marine
There is a corroded component to my Yanmar 4JH2E (1990) marine engine. It appears to have a salt-water leak that has caused the corrosion. The component is at the aft end of the engine, and is shaped … read more
Tan
Tan
MerCruiser Certified Technician
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11,409 satisfied customers
I have a 2007 33 formula boat with twin 496 mags. They have
I have a 2007 33 formula boat with twin 496 mags. They have only 215hrs. The boat stay on a lift hooked to shorepower and a battery charger. 3 weeks ago the port engine did not want to start. It seeme… read more
Jeff G.
Jeff G.
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My Yanmar 2QM15 diesel will not start. The starter motor engages
My Yanmar 2QM15 diesel will not start. The starter motor engages and the cranks very slowly and will not spin up the engine fast enough to fire. I thought it was weak batteries (first cold weather) bu… read more
Captain Dave
Captain Dave
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Any problems with the new Volkswagen Marine Diesel Engines
Any problems with the new Volkswagen Marine Diesel Engines? Any recommendations for a marine repower per manufacturer?… read more
Yachtwork
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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.

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