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I am having starting issues with a Yanmar 315hp. It rolls a
good morning. I am having starting issues with a Yanmar 315hp. It rolls a long time before starting. My mechanic suggested changing the timing belt and resetting the valves. This has not helped. I hav… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have Yanmar 370s 6lya-STP engines. I have a soot problem
I have Yanmar 370s 6lya-STP engines. I have a soot problem that I desperately need some assistance with. I'm getting soot on the transom and the lower rear part of the vessel. Is there anything I can … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
hello, last year we installed 2 rebuild yanmar 6lpa 315 hp
hello, last year we installed 2 rebuild yanmar 6lpa 315 hp into a sea ray 37 ft, engines runs fine , but after a slow traject from 1 to 2 hours at slow speed 1500 rpm both engines starting smoking whi… read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,396 satisfied customers
I have twin D3 diesels on my power cat. They would both always
I have twin D3 diesels on my power cat. They would both always pull 4,000 rpm at wot. recently, however, starboard won't pull more than 2,500rpm. Temps are good at about 180 degrees, fuel consumption … read more
Malta Tech
Malta Tech
Marine Tech
High School or GED
287 satisfied customers
I am looking at purchasing a Albin Express Trawler in Monterey.
I am looking at purchasing a Albin Express Trawler in Monterey. It has the Yanmar 6LP-STE engines that apparently were a subject of a recall and law suit. Can you confirm with me that these engines we… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I 6LP STE 315 Yanmars. The port engine fires up as soon as
I 6LP STE 315 Yanmars. The port engine fires up as soon as I push the stater switch. The starboard side use to fire up the same a the port side. Now the starboard engine turns over 5-6 times I release… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a Luhrs 28 with twin Yanmar 4LHA-STE 240 HP diesels.
I have a Luhrs 28 with twin Yanmar 4LHA-STE 240 HP diesels. My port motor has given me cooling problems since new in 2006. I have done all the needed mainenance suggested by Yanmar. I can cruise at 30… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a yanmar 315 hp turbo diesel in my mainship pilot 30.
I have a yanmar 315 hp turbo diesel in my mainship pilot 30. The exhaust elbow had to be removed to service the generator. I now have white smoke leaking from under the fabric heat shield on the elbow… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I am looking at making an offer on a 42 foot sports fisher.
I am looking at making an offer on a 42 foot sports fisher. It has been re powered with a pair of Yanmar 315 6LYN-UTE engines. The boat has a 13' 3" beam and a 25000 displacement. Although the engines… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers and Alpha one drives The boat has 310 hours on it and had been used very little before I purchased it in 2008 For the past several … read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
2,678 satisfied customers
My almost new 2007 Yanmar marine diesels 315s have smoked
My almost new 2007 Yanmar marine diesels 315's have smoked from the day I bought the boat until now. It's blue and and is pronounced when the engines are cold.… read more
Capt.Cory
Capt.Cory
LICENSED CHARTER CAPTAIN
High School or GED
2 satisfied customers
I recently paid over 7k to have my Bravo 3 port engine sterndrive
I recently paid over 7k to have my Bravo 3 port engine sterndrive lower unit rebuilt and the coupler on my 7.4 liter MPI engine replaced. I just received the boat back and there are a few issues: 1) P… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
twin yanmar diesel engines in 28 ft. bertram....vibration of
twin yanmar diesel engines in 28 ft. bertram....vibration of one engine when taking up speed....startup, idle and low speed is fine. Checked props and they look good.… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
2,061 satisfied customers
Dominick, This is the second question relating to recently
Dominick, This is the second question relating to recently installed remanufactured 454 engines in a 41ft cruiser. Both engines are still in breakin phase with 10hrs on port and 22 on starboard (Long … read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
I have a 2002 Sabreline 36 Flybridge Cruiser with twin Yanmar
I have a 2002 Sabreline 36 Flybridge Cruiser with twin Yanmar 370 engines. During a recent cruise, I noted that a lot of gray smoke was collecting a couple hundred feet behind the boat while traveling… read more
Diesel Boat Doc
Diesel Boat Doc
High School or GED
120 satisfied customers
Have a Carver 42ft Aft Cabin with two 7.4L MPI Gas Engines
Have a Carver 42ft Aft Cabin with two 7.4L MPI Gas Engines and wet exhaust system. Recently, when the boat is underway at a low RPM (20-30), the starboard side exhaust sounds louder than the port side… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
i have a 1989 340DA sea ray with twin 7.4 carb. while out
i have a 1989 340DA sea ray with twin 7.4 carb. while out on the boat last night.. about 40 mins into the cruise heard a "bump" behind myself (starboard engine) sounded like someone closing a cabinet.… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I HAVE TWIN TAMD 41P VOLVO ENGINES AND YESTERDAY RUNNING BACK
I HAVE TWIN TAMD 41P VOLVO ENGINES AND YESTERDAY RUNNING BACK IN AT 3O50 RPM I NOTICED THE STARBOARD ENGINE PRESSURE GAGE READING AT 50 PSI AND THE PORT ENGINE READING AT 70 PSI. DID NOT NOTICE ANY PO… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
2,061 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

2,678 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

22,043 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 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

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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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