Fed up of Volvo D3 issues...Yanmar to the rescue!

Nautorius

Nautorius

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Just came accross a test on the new Yanmar 180Hp $bY. It also seems they have built a better outdrive unit!

"Our first test of the Yanmar 4BY 180-hp diesel and brand new ZT350 stern drive lower unit package produced nearly 3 nmpg at best cruise in a rehabbed and repowered classic 1963 Bertram 25 Moppie. If only Dick Bertram were still alive to see that! With five heavy men aboard this twin engine Bertram produced a WOT of 43 mph (31.4 knots) and 18.6 knots (21.4 mph) at best cruise for an awesome 2.95 nmpg. That gives this Moppie a 184 nautical mile range (264 statute miles), enough to get you from New York City to Nantucket or from St. Tropez to Portofino non-stop. Now Yanmar makes the whole drive train from flywheel to lower unit. "

I know which I would prefer, but will the Europeans switch? It definitely seems very frugal and punchy!

Cheers

Paul /forums/images/graemlins/cool.gif
 
am I the only one that thinks that a 25ft boat should manage a lot more than 32knts with 360Hp on tap?

Also, the 3mpg figure seem low. Granted that is twins, and there will be more weight/drag but I would have thought 5-6mpg with a modern DI diesel would be nearer the mark at those sort of speeds. Even V6 petrol powered boats get close to 1lt/mile.

Any hoo, engine sounds good. lets hope the drive holds together, the BIII was always the achillies heel af the Yanmar units.

edit: just realised (or had it pointed out to me) that this is a US review, so will be US gallons. Doh!. Still think WOT was a bit slow mind...
 
[ QUOTE ]
am I the only one that thinks that a 25ft boat should manage a lot more than 32knts with 360Hp on tap?

[/ QUOTE ] Moppie 25 (a) was built in the 60's, so probably much heavier layup than a modern mobo and (b) has a proper Deep Vee hull. She may not go as fast as a modern plastic fantastic but I bet you can keep her at WOT for longer when the sea gets up! /forums/images/graemlins/cool.gif
 
Hey Paul, I know there are many issues about D3's posted on here, have to touch wood, but I had no problem with my new pair until now (140hrs). Last year I did a long search for a new diesel engine in my previous boat, and the results about Yanmar where very disapointing, almost no real live test results available on the BY's, apparantly there was no single installaed yet in benelux region at that moment.
Very slow or almost no response from the dealer, and I read on the web already about some issues on the BY's. Pls realise the BY's is a complete new developement, based on light weight BMW engines, nothing to do with the really solid old Toyota based models, Also the new drive, no experience available. So look around for good service and backup in your area
 
'salright, I am the one person you dont have to convince about the virtues of a proper Deep-V hull.

must be bloody heavily built mind. My 24 weighing 2400kgs manages 41knts with 225Hp, albeit from the single engine.
 
[ QUOTE ]
based on light weight BMW engines

[/ QUOTE ]

They are bloody brilliant engines - well worth looking at in that case.

I know of at least one 320d which has 140,000 on the clock and has never missed a beat...
 
[ QUOTE ]
[ QUOTE ]
based on light weight BMW engines

[/ QUOTE ]

They are bloody brilliant engines - well worth looking at in that case.

I know of at least one 320d which has 140,000 on the clock and has never missed a beat...

[/ QUOTE ]

Hope they didn't use the same turbo (Garratt) as is in the 2001-2003 engines - they're made of chocolate!
 
if they are using the current generation of engines, they were introduced in 2005 across the 3 and 5 series.

2.0, 2.5 and 3.0 engines in different states of tune.

318d, 320d and 520d are all the same basic 2.0.
325d and 525d use the 2.5
330d, 335d, 530d and 535d all use the 3.0
 
[ QUOTE ]
[ QUOTE ]
based on light weight BMW engines

[/ QUOTE ]
They are bloody brilliant engines - well worth looking at in that case.
I know of at least one 320d which has 140,000 on the clock and has never missed a beat...

[/ QUOTE ]
Used to be a BMW fanatic, had 400.000 km on the klok of my old 525TDS, so you don't have to convince me of the quality of these engines /forums/images/graemlins/cool.gif
Now that I am becoming older, I go more towards Mercedes /forums/images/graemlins/ooo.gif
But unfortunotly Yanmar has not been able to convince me with the BY series, and at that time I was really hoping they could ! Hopefully today, and in your region they will manage better,
but I agree with you Jez, certainly worth a look at them!
 
[ QUOTE ]
if they are using the current generation of engines, they were introduced in 2005 across the 3 and 5 series.

2.0, 2.5 and 3.0 engines in different states of tune.

318d, 320d and 520d are all the same basic 2.0.
325d and 525d use the 2.5
330d, 335d, 530d and 535d all use the 3.0

[/ QUOTE ]

The 325/525 330/530 & 335/535d's ie the six pots, all now use the same three litre block, but in different states of tune.

No 2.5 litre diesel anymore.
 
Just reached 100,000 miles on my 530d today!! Absolutely fantastic motor, best I have ever driven. No problems so far (touch wood) and such a so much torque at overtaking speeds.
Not sure how the latter would suit a mobo - I am a raggie.
 
For many reasons, the 6-cyl BMW engines have got a very good reputation.

The 320d's are a different story: just do a search on "320d swirl valve" to get the lowdown on what happens when these break off and disappear down the inlet manifold (new engine time /forums/images/graemlins/frown.gif).

dv.
 
Hi Nautorious

May I ask where you saw this report? Theoretically, the unit was only released at the Genoa Boat Show but the Yanks are obviously getting first crack.

Best wishes
Tony Jones.
 
Modern diesel engines are all fundamentally robust and durable.

The big issue is the quality and longlivity of the marinisation.

I hope the new BY2 gets its act together with the new wet manifold, the motor was was introduced with a dry exhaust manifold hidden in a neat little casing which cracked for a pastime at over $2500 a shot.

Big problem in the U.K for Yanmar is E.P. Barrus
 
[ QUOTE ]
am I the only one that thinks that a 25ft boat should manage a lot more than 32knts with 360Hp on tap?

edit: just realised (or had it pointed out to me) that this is a US review, so will be US gallons. Doh!. Still think WOT was a bit slow mind...

[/ QUOTE ]

Hang on sec, the numbers aren't that bad which is why the review is positive, just the maths are wrong! /forums/images/graemlins/ooo.gif

[ QUOTE ]
With five heavy men aboard this twin engine Bertram produced a WOT of 43 mph (31.4 knots) and 18.6 knots (21.4 mph) at best cruise for an awesome 2.95 nmpg.

[/ QUOTE ]

If you believe the 43mph then the calc's wrong, it should be 37.6 knots which is a good speed and believable. As you pointed out U.S. gallons are smaller too. Yanmar would appeare to be moving on well and a serious compeitor to Volvo in this smaller boat sector. Bravo IIIs' were good in my experience of them but they are costly to repair and they like anodes. /forums/images/graemlins/wink.gif
 
I know yours were ok, I was thinkning of the Yanmar 315Hp hooked up to BIII that cost a lot of owners a lot of money in blown drives.

Lets hope the Yanmar drives are made of stronger stuff as I like the engines.
 
a Bertram is a Bertram

all the rest is just plastic fantastic, I'will take the Bertram any time real boats made to last forever, LOL i think if an asteroid hits the world they will still be around
/forums/images/graemlins/laugh.gif
 
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