Change 4.108 for a Yanmar or Volvo ..55 or 75 hp?
Hi friends

I am studing change The 4108 for a

Volvo d2-75HP or Volvo d2-55HP

yanmar 4JH4 75HP or Yanmmar 4JH5E 52HP

Please give me your oppinions.

Thanks in advance

Fernando
Aldebaran 431/010

Hello Fernando. We recently changed from our 4.108 to a Volvo D2-55. While we are happy with the engine (it is strong and nice smooth running), we do have a few concerns. The Volvo alternator is self regulated, negative field, and if you are geared toward cruising with a big battery bank, then you know the need for an external "smart regulator". We were able to do the change, but is was with many many headaches - that continue today. Also, the Volvo has an electronic engine control "black box" for emissions management. If this box fails, and you are in a remote area, no local mechanic can help you.

So, if we were to do it again, I think that we would look more seriously at Yanmar. I believe that they are a true "mechanical" engine - no black box, no computer, no internally regulated alternator. This all means reliability and less headache.

For your boat (ours is a 41), the 55 HP is more than enough. For motoring speed, it is the prop you want to be concerned with. The 75 HP will just consume more fuel, in addition, the diameter of its exhaust hose is half again larger than the 55. This translates to carpentry on your boat. You also want to ensure that you don't go with an engine with a timing belt. Overhead cams and timing belts were fine in my Porsche, but for a sea boat, I think they are a reliability concern.

I hope our experience can be of assistance in your decision. making

Hi friends I am studing change The 4108 for a Volvo d2-75HP or Volvo d2-55HP yanmar 4JH4 75HP or Yanmmar 4JH5E 52HP Please give me your oppinions. Thanks in advance Fernando Aldebaran 431/010

Fernando:

Hello. My 411 had the Yanmar 4JHTE 48 HP engine installed before I bought her. The engine is well matched to the boat in power, size, performance, fuel consumption, etc. It's quiet enough and I'm so far very happy with it. I have a 3 blade 18 inch VP Maxprop that seems to be well matched also, so I achieve hull speed around 2,750 rpm, which seems about right to my mind and experience. There is an oversized 90 amp generator installed, which required the engine cover to be slightly enlarged on that side, but otherwise, everything fit just right into the old spaces.

If you would like to see any of the particulars, just let me know - I have photos and all other details to support the arrangement, and would be happy to send copies if it would help you.

Best Regards and Fair Winds,

Geoff, Corazon
411 #41

Hi

Thanks for your comments.

Then reading this, I think the best option is the yanmar 55hp

¿?

Regards
Fernando

The other option you might want to check out is Nanni. Nautor used these as standard fit on their smaller boats before they stopped doing smaller boats. I was very pleased with the 5 cylinder 85hp Nanni on Black Tie. Their engines in this class are based on the Japanese Kubota digger engines and are quite low revving and high torque. Gavin

You might also want to look at Beta Engines.  We changed our 4108 for a Beta 50hp year before last.  (From memory the Beta 60 is the same block).

We chose it becasue of 1) price (a lot cheaper than enything else), 2) no black box 3) no turbo, 4) would take our exisitng gearbox.

I believe it uses the same engine block as Nanni, the Kubota.

We opted for the optional alternator 175amp to run dedicated house battery charging. All wired straight into our exisitng instrumentation set etc.

Very happy with it, probably covering some 2000 miles with it now.

Dont forget there is good demand for the 4108; the sale of ours covered the instillation costs of our new engine!

Happy sailing.

Adrian

thanks for the KUBOTA option...i´m going to study..

Fernando

For what it is worth the previous owner of Wotan 411-40 changed the Perkins 4108 for a Volvo D2-55HP in 2003. He had to make a slight modification to the engine box to accommodate the engine. The engine has done 2500 hours over 9 years and is still purring nicely! I put on an additional alternator for ocean cruising. It runs a Maxprop three blade propeller, I don't have the diameter. I find that optimum cruising revs is 1750 rpm using about 3l/hr.

Anthony Fawcett

Wotan 411-40

I looked hard at the Beta38 (BV1505) to replace the 4-108 in my 41. This can be supplied with mounting feet that match the Perkins, I also intended to use the existing gearbox. The Borg Warner velvet drive gearboxes are greatly superior to the mechanical engagement PRM type, also you need an in line gearbox. I was quoted £5127 delivered to Falmouth without gearbox, but ready to fit the Borg Warner. I never worked out what to do about the exhaust system.

  Eventually I decided to keep the Perkins a few more years. I fitted a new alternator with smart controller, and am really quite happy with the Perkins. You just need to mop up the oil in the drip tray every month, and avoid the exhaust smoke while it warms up!

regards

Cosmo Little

Hi friends

At the end, I Have decided to put a Beta 57 (Kubota)

Here you have atached the brouchure.

Very good price, (6.600 Eur + 18% tax) 35% discount, and is mecanical, easy to repair, and they say the engine is going to be ready to use my Velvet inversor.

The engine arrive on 15 sept....

Thanks for your help

(If anyone needs a 4.018 or spares...i have alot..)

Best regards
Fernando