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508 - Type of engine Yanmar 80hp?

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Christian K View Drop Down
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Joined: 03 December 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Christian K Quote  Post ReplyReply Direct Link To This Post Topic: 508 - Type of engine Yanmar 80hp?
    Posted: 07 March 2021 at 13:05
Dear 508 owners,

we ordered a new 508 for march 2022 and looking forward to the delivery.

What exactly type of Yanmar 80HP engine will be delivered?
We dinīt found any clear specification in the order oder specification from HANSE.
Only "approx. 80 HP"

At Yanmar website we found 4JH80. Will this be the current modell?



And what fuel consumption do you have in normal conditions approx 7 kn SOG?
We found that figure at Yanmar for the 4JH80:

Thank you very much for your help!

Fair winds,
Christian
HANSE 508 #88
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ohthetrees View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ohthetrees Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2021 at 18:32
Assuming a relatively modern engine, I believe fuel economy will depend on the full system, and the engine may be the smaller part of that equation. Hull, top-sides wind resistance, propeller, how clean the bottom, and engine all play a roll. On our 505, with a volvo D275, we get ~3.4 liters/hr at 6 kn, and about ~4.25 liters/hr at 7kn. This is real world cruising conditions, which are sometimes not very nice. 

As an aside, I wish we had a smaller engine, with no turbo. We can exceed 9kn with our D2-75 75hp Volvo. We cruise long distances, and running fast enough to keep the turbo spun up and carbon deposits down is too fast and too much fuel. To run at preferred speed of 6.5kn, we must run at around 1700rpm, which is lower than Volvo recommends for cruising. At 2000 rpm, engine is happy, but we are going 7.5kn and using a lot more fuel. Even going into a chop, and 30kn of wind, 2000 rpm is enough power for us. We never use the full power, which is 2700rpm, and 9kn, except when we are testing, or trying to burn away the carbon. I think our boat would perform perfectly, even in adverse wind and chop with the non turbo D2-55. With that would come lower initial cost, lower maintenance (no turbo), and run at more optimum load, hence less carbon problems. I don't know if your 508 came with engine choice, but I would definitely select a smaller engine if available.
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Christian K View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Christian K Quote  Post ReplyReply Direct Link To This Post Posted: 25 March 2021 at 19:54
Thanks a lot! Very intresting. The consumption is very high. I thought bigger engine is better.
But we havenīt a choice. Meanwhile we know the 508 will come with the 80 HP Yanmar turbo.

THanks again and fair winds
Christian
HANSE 508 #88
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