Yanmar Diesels / Single or Twin

M

MarkMuck

Member
Joined
Jan 1, 2000
RO Number
362
Messages
264
Hey Boaters. The wife and I are looking at trawlers. For years we've had twin engine gas boats. Many of the boats we are looking at have Yanmar diesels. We will be using the boat primarily near our harbor but plan to take some long trips with it too. Probably not the loop.

1. How are the Yanmar's? Reliable? Finding service? Fuel efficiency?
2. Many boats only have one Yanmar. This worries me for traveling. Just in case.

Thoughts and opinions are welcome.... Thanks....
 
It s not redundancy or reliability but maneuverability as well Yanmars are ok overall but not as “heavy duty”as a Cummins, John Deer etc
 
quote:
Originally posted by PascalG

It s not redundancy or reliability but maneuverability as well Yanmars are ok overall but not as “heavy duty”as a Cummins, John Deer etc

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True for many of these engines, but not across the board.

Yanmar uses a lot of aluminum to save weight - proper maintenance is critical to longevity.

I ALWAYS fresh water flush my Yanmars and genny after each use.

After 12 years the only item replaced has been one starter solenoid.

RWS
 
Yanmar is the diesel division of Toyota. Enough said. I once tried to buy a Yanmar powered Lexus in Paris. Wish I could have got it done.
 
If I had a choice I would buy the classic heavy iron engines. People have ben happy with Yanmars but IMO they are more sensitive to maintenance and hard running.

The fuel efficiency wont depend on the engine brand but on how fast you go.
 
IIRC, he had one in his boat that he never had time to use.
 
Good luck finding a good reliable service company... its a big problem here in Long island

Rob
 
The single vs. twin part doesn't bother me a bit. I only will consider boats with a single. As i understand it, the most common category of engine problem is fuel-related. On most boats with twins, they draw from the same fuel tank.

I'm currently looking for a new boat with a diesel engine. My mechanic strongly recommended to find one fitted with a Yanmar. He feels they are excellent engines that are very reliable in the long-term.
 
quote:
Originally posted by b_arrington

The single vs. twin part doesn't bother me a bit. I only will consider boats with a single. As i understand it, the most common category of engine problem is fuel-related. On most boats with twins, they draw from the same fuel tank.

I'm currently looking for a new boat with a diesel engine. My mechanic strongly recommended to find one fitted with a Yanmar. He feels they are excellent engines that are very reliable in the long-term.

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Brad
RE…On most boats with twins, they draw from the same fuel tank.
Not so, my engines each draw normally from their own tanks- however I do have the option of directing fuel in many ways if needed
 
quote:

RE…On most boats with twins, they draw from the same fuel tank.
Not so, my engines each draw normally from their own tanks- however I do have the option of directing fuel in many ways if needed

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Ah, OK. I guess I should have said that under a certain size it's pretty common to have a single tank. Your boat looks to be considerably above that size. The size of boat I'm looking at certainly would have a single tank.
 
Brad
I believe that Yanmar makes a good product, But i have to agree with Robs statement "Good luck finding a good reliable service company... its a big problem here in Long island"
There are some that are good but i dont believe are as reliable as most clients would like., just my 2cents
 
The reason behind the number of tank is simply space and location. Often builders have to split the fuel tankage in two or more tanks so they fit enough capcaity. When using alum tanks, getting tow or three smaller tanks in is easier than a single big one. Especially since alum tanks eventually need to be replaced

Dual tanks doesnt necessrily increase reliabiilty since people almost always fill all the tanks at the same time. Bad fuel is very rare anyway and good filtration common on diesel handle normal contamination.

Th boat i run has a single 2000 gal fiberglass keel tank. Best possible setup
 
quote:
Originally posted by GeeBee

Yanmar is the diesel division of Toyota. Enough said. I once tried to buy a Yanmar powered Lexus in Paris. Wish I could have got it done.

Click to expand...


Yanmar and Toyota began a limited joint venture in the marine market place in 2015-2016.
Hino is/was the diesel production company assumed by Toyota in about 1967. Hino motors was/is the company that participated and is participating in the heavily quoted SPC production systems. For those of us who have had Hino marine diesels their robust nature is well appreciated.
 
quote:
Originally posted by GeeBee

Yanmar is the diesel division of Toyota. Enough said. I once tried to buy a Yanmar powered Lexus in Paris. Wish I could have got it done.

Click to expand...


Yanmar and Toyota began a limited joint venture in the marine market place in 2015-2016.
Hino is/was the diesel production company assumed by Toyota in about 1967. Hino motors was/is the company that participated and is participating in the heavily quoted SPC production systems. For those of us who have had Hino marine diesels their robust nature is well appreciated.
 
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