Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-09-2016, 08:05   #1
Registered User

Join Date: Oct 2010
Location: Blue Mountain Ont
Boat: Beneteau Oceanis 400 40 ft "Camp David
Posts: 383
Engine Noise

My question is general and broad in nature .

Which of the major diesel engines built in the last 15 or so years is the quietest?

I own a Perkins Prima 50 designed in the late 80's and produced for about 15 years 89 to 2001. In looking for a new to me boat I would like a quiet engine. I know quiet is relative and reliability and operating expenses are #1.

The new engine manufacturers seem to be Yanmar, Volvo , a few Westerbeeke and others.

I believe Yanmar is the engine of choice however how does it compare to the noise level.

Has anyone installed Sound down or something similar noise insulation in the engine compartment and if so did it make a noticeable improvement?

Thanks

Fletch

Sent from my SGH-I337M using Cruisers Sailing Forum mobile app
__________________

__________________
CampDavid is offline   Reply With Quote
Old 16-09-2016, 08:19   #2
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 15,375
Re: Engine Noise

It would be a common rail engine, which one I don't know, but would bet common rail and turbo
It's possible to quieten down a common rail to almost spark ignition levels of NVH
NVH stands for Noise, Vibration and Harshness
__________________

__________________
a64pilot is online now   Reply With Quote
Old 16-09-2016, 08:32   #3
Registered User
 
4arch's Avatar

Join Date: Jan 2010
Location: Baltimore
Boat: Beneteau Oceanis 400
Posts: 216
Images: 1
Re: Engine Noise

Surprised you're letting go of your 400. I've found the quietness of the Prima 50 and Beneteau's installation to be slightly above average compared to other sailboats I've been aboard. On a previous boat I installed the expensive sound insulation only to find it didn't make a huge difference. I determined a lot of the noise to be the result of vibration and the installation of the exhaust system/waterlift muffler. Not that I wouldn't have wanted the insulation, just that addressing the other issues would have made a bigger difference.
__________________
4arch is offline   Reply With Quote
Old 16-09-2016, 08:34   #4
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 18,720
Re: Engine Noise

Yanmars in general seem to be comparatively quiet. Although today I think the Beta/Kubota are more the engine of choice, I've not had a Beta though. It's a good question. A Nanni/Mercedes was probably the noisiest I've had.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 16-09-2016, 08:47   #5
Registered User
 
Panope's Avatar

Join Date: Sep 2012
Location: Washington State
Boat: Colvin, Saugeen Witch (Aluminum), 34'
Posts: 1,546
Re: Engine Noise

I used my Yanmar for a season with no insulation. After adding Sound Down insulation to 3 sides and the top of my engine box, I can report that it made a big difference - much quieter. Money well spent.

I look forward finishing the job. However, insulating the rear of the engine area will be a challenge as this is where all of the electrical, plumbing, and drive shaft connections are located.

Steve
Panope is offline   Reply With Quote
Old 16-09-2016, 08:52   #6
Registered User

Join Date: May 2015
Location: Muskegon, Mi
Boat: Columbia 36
Posts: 174
Re: Engine Noise

Do the sound proofing right and it won't matter what engine you have. I doubt any brand is that much quieter than any other.
__________________
capt jgw is offline   Reply With Quote
Old 16-09-2016, 09:44   #7
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 15,375
Re: Engine Noise

Quote:
Originally Posted by capt jgw View Post
Do the sound proofing right and it won't matter what engine you have. I doubt any brand is that much quieter than any other.

The Common rail motor in my pickup would amaze you, even cold it is very quiet, not much more noisy than a gas motor, my older DI motor would raise the dead, especially when cold.
__________________
a64pilot is online now   Reply With Quote
Old 16-09-2016, 15:33   #8
Registered User

Join Date: Aug 2015
Posts: 408
Re: Engine Noise

The various engine are all going to sound quite similar. If you want the lowest noise look for naturally aspirated and low rpm, then insulate the engine room very thoroughly.

That said, I'd rather have a Yanmar over a Volvo or Beta any day. Way better parts availability as you travel around.
__________________
boatbod is offline   Reply With Quote
Old 16-09-2016, 17:24   #9
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 16,820
Re: Engine Noise

I found both Vetus and Westerbeke relatively quiet (I think these are both Mitsubishi).

I found new Volvo very very quiet at slow revs but somewhat irritating once at fast cruising speed. The reverse with a Yanmar - very clunky idling, much smoother at higher revs. Similar sound to Volvo overall.

A Beta (I think this is Kubota) very decent sound, way finer than Volvo or Yanmar. This one was a bit noisy at slow revs but it got only somewhat louder at fast pace. Definitely a nice one.

Surprisingly (really?) the best sound I have heard in any new engine was a Bukh. Bukh was louder but the sound was lower. I may be somewhat over sensitive to high pitchy sounds.

So, I found Bukh best. Beta second best. Vetus and Westerbeke next.

All were small engines - 25 hp max, I think.

Cannot say which engine had best insulation though ... best mounts ... and how the differences in boat construction dampened or exaggerated the sound of these engines ;-(

b.
__________________
barnakiel is offline   Reply With Quote
Old 16-09-2016, 17:29   #10
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 16,820
Re: Engine Noise

Quote:
Originally Posted by a64pilot View Post
The Common rail motor in my pickup would amaze you, even cold it is very quiet, not much more noisy than a gas motor, my older DI motor would raise the dead, especially when cold.
This!

I walked by my friend fixing his bike. His car's hood was open and the engine was running. I looked and asked what he had. He said it was a 120 hp diesel. The car is about 20 years old. Looks something Japanese.

THAT was the quietest diesel engine I have ever heard.

Why a 1/10 hp marine diesel is 10x that loud ... ??? Beyond me.

As others said, it must be the common rail technology. Not found in small marine diesels, I think (???)

Cheers,
b.
__________________
barnakiel is offline   Reply With Quote
Old 16-09-2016, 17:40   #11
Registered User

Join Date: May 2012
Posts: 466
Re: Engine Noise

While you are looking for a smooth quite diesel may as well look for a sail boat that don't lean ! Man you have to suffer with us hA hA
__________________
sartorst is offline   Reply With Quote
Old 17-09-2016, 05:54   #12
Registered User

Join Date: Oct 2010
Location: Blue Mountain Ont
Boat: Beneteau Oceanis 400 40 ft "Camp David
Posts: 383
Re: Engine Noise

That is a sound idea!

Sent from my SGH-I337M using Cruisers Sailing Forum mobile app
__________________
CampDavid is offline   Reply With Quote
Old 17-09-2016, 17:15   #13
Senior Cruiser
 
Jim Cate's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 10,603
Send a message via Skype™ to Jim Cate
Re: Engine Noise

Common rail designs are indeed much quieter than traditional diesels with fixed injector timing. They are also inherently more efficient... really cool, that!

BUT, they are subject to absolute reliance upon a very complicated electronic system, coupled to a very complicated injector system. This means that simple electrical failure can still its beating heart, to say nothing of more sophisticated maladies.

For me, this rules them out for auxiliary power on any long distance cruising boat, and makes them dubious in less demanding applications. Which is a pity...

Jim

PS We currently have a Kubota based Nanni engine which has been a good'un... but it is not any quieter than other similar sized conventional diesels that I've heard.
__________________
Jim and Ann s/v Insatiable II lying Aquatic Paradise Qld for a while.
Jim Cate is online now   Reply With Quote
Old 18-09-2016, 19:05   #14
Registered User

Join Date: Aug 2015
Posts: 408
Re: Engine Noise

Thanks to EPA mandates, common rail is required for the larger sail boat engines (-100hp) so it's probably only a matter of time before all new diesels have it. No different than all new gas engines being fuel injected.
__________________
boatbod is offline   Reply With Quote
Old 18-09-2016, 19:40   #15
Registered User
 
SailRedemption's Avatar

Join Date: Feb 2014
Location: New Orleans
Boat: Kaufman 47
Posts: 697
Re: Engine Noise

I have a Yanmar 4JH4-TE 75hp turbo in our boat. I put a lot of time into our sound proofing so can't say much if it's the engine or that work. But, I have heard that turbo desiels are quieter than comparable non-turbo engine.

You can search our site in my signature for our engine room revamp.
__________________

__________________
SailRedemption is offline   Reply With Quote
Reply

Tags
engine, noise

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Reducing Engine Noise DaBod Engines and Propulsion Systems 4 29-07-2013 06:48
Sailboat Engine Noise Makes Me Nervous halsar Monohull Sailboats 25 13-02-2013 11:34
Perkins 4-108 Engine Noise jubi964 Engines and Propulsion Systems 13 15-09-2011 11:37
Propeller Noise! New Engine, Old Prop Paolo Propellers & Drive Systems 9 05-10-2009 19:29
Engine Cover/ Noise Abatement sundown Construction, Maintenance & Refit 10 29-08-2009 18:07


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:42.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.