Originally Posted by CampDavid
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?
Sent from my SGH-I337M using Cruisers Sailing Forum mobile app
Yes, I used the Soundown material to soundproof the engine compartment on my Universal (Kubota) 5424, and it made a huge difference. I focused on noise in the cockpit
, so put two layers of vinyl-loaded 1" material under the cockpit
sole, one layer at the sides of the engine compartment, and two layers inside the doors to the compartment.
Most noise is now from the exhaust
. Considering adding an extra in-line silencer.
My belief is that it is easier to make the cockpit quieter, than the rest of the boat interior
, as inside the boat the noise travels through the hull
, cabin sole
, spaces, etc.
What exactly do you want to achieve? Silence is not possible. 10db quieter is possible.
In automotive applications the Prima was considered to be one of the noisiest engines ever made. I've been in an Austin Montego with the Prima and the racket was unbelievable. But the good news is you can certainly make it much better.
If the engine is running well, I certainly would try the soundproofing route
as no matter how much you use, it'll be cheaper than a new engine!