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Fuel consumptio Yanmar 30hp

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Perttu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Perttu Quote  Post ReplyReply Direct Link To This Post Posted: 03 June 2010 at 21:17
Hello!

Some people claim that a good rule of thumb is 1l/hr for each 10 hp.

In my 2GM20 this is spot on since past 250 hrs (4 years) is around 2 ltrs/hour including Webasto 3.5 kwh in a relative cool climate (Finland).

4ltr/hr sounds very high for a small sailboat, especially when typically you need 60-70% of the engine power...
Check my sailing videos - http://www.youtube.com/user/l11483?feature=results_main
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Henrik84 Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2010 at 20:30
Hi.
Now im back from the sailing trip this weekend.

We used the motor for 9 hours and we started with full tank and when we came back we filled the tank again.
we filled the tank with 10,7L of diesel.

2700 rpm almost all the time, maby 30 min in around 1000 rpm in/out the harbor.
 
/Henrik
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JohnA Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2010 at 10:48
We were told that, using a Yanmar30 with a Hanse 320 at around 2500 rpm. would use approx. 1 litre/hour. The previous postings seem to bear this out.
Hanse 320 #464 'Discovery'
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cptgood Quote  Post ReplyReply Direct Link To This Post Posted: 30 April 2023 at 11:29
Hi,
I always planned considering the consumption was 2,5lt/hr @ 2400-2500 rpm ; original fixed 2 blade prop.
According to the specs it should be around 2,1 lt/hr.
I probably overestimated because my calculations don't match with the led indicators (still full after a few hours). 
Anybody has done  a recent and reliable check on consumption? I think the value reported in the  last message above, 1 lt /hr,  is not correct at all).
Hanse320 - Hull#127/08 - Wheel - ST headsail - Yanmar 3YM30 - SD20
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dubs2021 Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2023 at 22:30
My 348 with the 3YM20 burns about 0.50 GPH overall average. The first full year I burned a total of 50 gallons. Use pattern includes a high number of day sails where I only use the engine in and out of the marina, and usually 2-3 cruises per boating season, where I sail as much as the wind, time and current will allow. All this is such a relief from our prior power vessels; the last year with the Tug, we burned 500 gallons diesel. 

Hugh
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Martin&Rene Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2023 at 20:29
Hugh
Is that a US gallon = 3.78 litres
or
UK gallon  = 4.55 litres
?

I am guessing from your comments that there are quite a significant number of hours at less than full cruising speed.
Martin&Rene Hanse 341 Dipper Wheel steering, 3 cabin layout, normally based in Scotland
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dubs2021 Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2023 at 01:07
US gallon = 3.78 liters so my average 0.5 GPH burn rate is about 1.9 liters/hour.  That seems in line with the other comments. With no consumption guage to show what the incremental burn rate is, all I can do is get the overall average when refueling. Yes, plenty of time in/out of marina is 1000-1500 RPM. Motoring somewhere (no wind, places to be) we run 2500-2900 RPM.

Weather rapidly improving in the Salish Sea. Sunny and 60F today, with temps climbing to ~80F next weekend!

Cheers
Hugh
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Post Options Post Options   Thanks (0) Thanks(0)   Quote S&J Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2023 at 01:15
4l/h for this engine in way to high.
The Volvo D30 on my 385 averaged less than 2l/h over six seasons use.
The Yanmar 57 on my 458 has averaged just over 3l/h so far.
I tend to aim for 6kts under engine.  This was about 2,000rpm on the 385 and 1,800rpm on the 458.
You can push the engines harder but your fuel consumption will be punished.
The current Yanmar engines have N2K integration so you can see actual consumption at any time.
H458 #159 Primal Mediterranean cruising
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dubs2021 Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2023 at 19:48
RE: "The current Yanmar engines have N2K integration so you can see actual consumption at any time."

This is good to know - and one might add that, to harvest that data, we need to do our homework, invest in cables and new devices, tap into that backbone and have a screen to monitor its data. 

Full integration of engine, GPS, wind, tide, temp, speed, etc data is common in other yachts, right off the line; ours did not offer that integration as standard equipment. 

I enjoyed fully integrated solutions with Garmin/Volvo Penta products, which came standard on prior vessels. When I asked about integration between Yanmar/B&G, the folks at my Hanse dealer did not offer a solution. 

Thanks to the writers on this blog, however, such integration is not only possible, but within reasonable reach, given determination, time and investment. 
Hugh
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Post Options Post Options   Thanks (0) Thanks(0)   Quote S&J Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2023 at 00:48
My 2021 458 came with a Yamar engine and this was integrated to the N2K network by the factory as standard.  
My 2015 385 had a Volvo engine which was not integrated however I was able to use a Yacht Devices Engine Gateway to do this.  I suggest you Google Yacht Devices to see their products which are reasonably priced although they are a Russian business and the war with Ukraine may have affected supply.  Unfortunately Volvo provided very limited data which did not include real time fuel consumption.

My conclusion is that the Volvo, which dates back many years, is a less sophisticated engine than the Yanmar.  In many ways you want simplicity in a marine engine so that it is reliable and easy to repair, but if you want full integration with your instruments it will be expensive.
H458 #159 Primal Mediterranean cruising
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