250hp Engine Tests - More Realistic Figures?

Chris Murray · 15 January 2006, 10:27

I found this info on a site called "www.thehulltruth.com" under "Re-Power with an Etec" ...

They did a similar test to RIB International with some rather different results:

I have cut & pasted just the performance/fuel consumption info but there is a lot more technical info on the site.

See below.

Testresults summary:
---------------------------
Boat: Anytec 750 SP aluminium boat, 7,50 x 2,26 meter, Weight 950 kg without outboard, Weight with outboard and 4 persons onboard approx 1600 kg.

Evindrude E-Tech 250:
Raker 3-blade 24 inch prop
Mounting height 4th hole
Max rpm in test 5500

Speed (knots):
Max rpm 51,5
-500 47,5
-1000 37,7
-1500 32,8
-2000 29,0
-2500 22,2

Liter/hour:
Max rpm 84,0
-500 68,0
-1000 49,2
-1500 36,4
-2000 32,8
-2500 26,2

Liter/nautical miles:
Max rpm 1,63
-500 1,43
-1000 1,31
-1500 1,11
-2000 1,13
-2500 1,18

Sound level, decibel:
Max rpm 93
-500 88
-1000 87
-1500 86
-2000 81
-2500 78

Mercury Verado 250:
Mirage 3-blade 21 inch prop
Mounting height 4th hole
Max rpm in test 6000

Speed (knots):
Max rpm 51,0
-500 46,0
-1000 42,4
-1500 38,0
-2000 33,4
-2500 28,4

Liter/hour:
Max rpm 102,0
-500 78,5
-1000 62,0
-1500 45,0
-2000 38,5
-2500 27,1

Liter/nautical miles:
Max rpm 2,00
-500 1,71
-1000 1,46
-1500 1,18
-2000 1,15
-2500 0,95

Sound level, decibel:
Max rpm 84
-500 83
-1000 82
-1500 81
-2000 80
-2500 79

Suzuki DF 250:
Suzuki 3-blade 24,5 inch prop
Mounting height 3rd hole
Max rpm in test 6000

Speed (knots):
Max rpm 51,2
-500 47,0
-1000 43,0
-1500 38,2
-2000 34,0
-2500 29,0

Liter/hour:
Max rpm 88,6
-500 73,4
-1000 57,6
-1500 48,0
-2000 41,0
-2500 31,8

Liter/nautical miles:
Max rpm 1,73
-500 1,56
-1000 1,34
-1500 1,26
-2000 1,21
-2500 1,10

Sound level, decibel:
Max rpm 89
-500 86
-1000 85
-1500 84
-2000 82
-2500 79

Yamaha F250:
Yamaha Pro Series 3-blade 23 inch prop
Mounting height 2nd hole
Max rpm in test 5900

Speed (knots):
Max rpm 52,0
-500 47,5
-1000 42,5
-1500 37,0
-2000 32,4
-2500 27,2

Liter/hour:
Max rpm 86,5
-500 73,0
-1000 56,8
-1500 47,5
-2000 40,2
-2500 31,6

Liter/nautical miles:
Max rpm 1,66
-500 1,54
-1000 1,34
-1500 1,28
-2000 1,24
-2500 1,16

Sound level, decibel:
Max rpm 86
-500 85
-1000 84
-1500 83
-2000 81
-2500 79

I have opted for the Etec for my new Scorpion "Aries IV" (I gave up trying to find a font that looked right for "Quick One" - It's also grown to 8.5 metres.

I have calculated some additional fuel consumption figures for the Etec, using 4.454 litres to the gallon.

RPM / MPG / 100 NM trip / Fuel @ £5.20 per gal / KTs on Test

5500 2.73 36.6 gal £190 52

5000 3.11 32.2 gal £167 48

4500 3.40 29.4 gal £152 38

4000 4.01 24.9 gal £129 33

3500 3.94 25.4 gal £132 29

3000 3.77 26.5 gal £138 22

These figures look more like what I would have expected (hoped for) from a modern super-efficient engine. My last boat did 2 NM per gallon for much of its life, so these figures look much better to me!

I hope you find this helpful!!

Regards to all.

Chris.

Jono · 15 January 2006, 10:59

C,mon Chris... get with the programme...

http://www.rib.net/forum/showthread....1&page=2&pp=10

and "borrowed" for inclusion in the latest thread... http://www.rib.net/forum/showthread....3&page=9&pp=10

Chris Murray · 15 January 2006, 16:49

Quote:

Originally Posted by Jono

C,mon Chris... get with the programme...

http://www.rib.net/forum/showthread....1&page=2&pp=10

and "borrowed" for inclusion in the latest thread... http://www.rib.net/forum/showthread....3&page=9&pp=10

I wondered where I got this info from originally! I printed it out at the time and then came across it again last night. I should have guessed that it came from a well-informed RIBnet-er!

I've obviously been away from the water for too long!

It does seem more realistic than RI's "findings" though.

Cheers!

Chris.

codprawn · 15 January 2006, 18:27

Quote:

Originally Posted by Jono

C,mon Chris... get with the programme...

http://www.rib.net/forum/showthread....1&page=2&pp=10

and "borrowed" for inclusion in the latest thread... http://www.rib.net/forum/showthread....3&page=9&pp=10

Still handy to see all the data posted on here though!!!

Seems like the Etec is the one to have - or the suzuki - Verado seems way too over the top - too expensive - too heavy - and not that good on fuel.

Roy Smith · 15 January 2006, 20:37

Chris have you looked at Scorpions spread sheet of engine speeds etc.
It puts the Suzuki firmly in front for speed, some interesting figures on the others
Looking at this test as follows
Yamaha 52 kts & 86.5 Lt / Hours
Suzuki 51.2 kts & 88.6 Lt / Hours
Merc 51 kts & 102 Lt / Hours
E-Tec 51.5 Kts & 84 lt / Hours
On this test I would put the E-Tec first but only on a cost base which is good now, but in three years time when the warrenty runs out ?.
If resale and depreciation is not an issue and the fact there is no past relabilty record to look at then E-Tec as it.

codprawn · 15 January 2006, 21:34

To be honest - seeing how close they all are - I think it would come down to who does the best deal on the day!!! Play them all off against each other and go for the best deal - how low will THEY go????

Simon B · 15 January 2006, 23:12

I was mildy cheered that Rib Intl had upped its coporate ante to do something more like a magazine of international standing should do but was slightly perplexed by HMS's comments in his editorial, do any Ribnetters have the inside curve on who he may or may not have pissed off (allegedly) apart from HM Coastguard who he appears to have apologised to..ther go ? but for the grace of god.

Chris Murray · 17 January 2006, 23:17

Quote:

Originally Posted by Roy Smith

If resale and depreciation is not an issue and the fact there is no past relabilty record to look at then E-Tec as it.

Hello Roy,

I plan to keep this boat until I retire (about 14 years), so resale of the engine isn't too critical. I believe that some of the Ficht engines were "dogs" but I should like to think that Evinrude has since learned from its mistakes and has overcome them.

Logically, a lighter engine should have better acceleration than a heavier one, especially when the lighter one has a one power stroke in every two, as opposed to one in four. Given that fuel economy looks reasonable (perhaps even "good"), relative to what else is available today, then I find it difficult to go for anything else.

Funnily enough, even without the Ficht problems, I would have been very reluctant to even consider Evinrude, in years gone by. How attitudes change!

I finalised my boat order yesterday. Building will start in just a few weeks. Roll on Spring!

Regards,

Chris.

codprawn · 18 January 2006, 05:23

Quote:

Originally Posted by Chris Murray

Hello Roy,

I plan to keep this boat until I retire (about 14 years), so resale of the engine isn't too critical. I believe that some of the Ficht engines were "dogs" but I should like to think that Evinrude has since learned from its mistakes and has overcome them.

Logically, a lighter engine should have better acceleration than a heavier one, especially when the lighter one has a one power stroke in every two, as opposed to one in four. Given that fuel economy looks reasonable (perhaps even "good"), relative to what else is available today, then I find it difficult to go for anything else.

Funnily enough, even without the Ficht problems, I would have been very reluctant to even consider Evinrude, in years gone by. How attitudes change!

I finalised my boat order yesterday. Building will start in just a few weeks. Roll on Spring!

Regards,

Chris.

Mercury also had problems with the early optis - what new product is EVER problem free???

Don't think there have been any cases of the ETECs suffering problems like the old Fichts.

Roy Smith · 18 January 2006, 17:19

Hi Chris
Did you get to look at scorpions spread sheet of speeds etc.
It was only that the Suzuki was the quickest engine.

gtflash · 18 January 2006, 21:43

what about oil consumption for the etec 2 stroke??? someone must know?? does that outweigh fuel savings?? or does it equate to the cost of changing oil in a 4 strokers service??

Jono · 18 January 2006, 22:02

Quote:

Originally Posted by gtflash

what about oil consumption for the etec 2 stroke??? someone must know?? does that outweigh fuel savings?? or does it equate to the cost of changing oil in a 4 strokers service??

£40 -ish quid every 100 hrs (8 Litres of synthetic).....for a big four stroke.... plus the cost of the filter...

Roy Smith · 18 January 2006, 22:26

How much is the oil for E-tec how much dose it burn per mile etc.
add that to petrol costs plus is the service 3 years or 300 hours i/e I did approx 180 hours last year so i would be servicing after 18 months what is the service schedule after that would it be 100 hours and how much is a service. This information as been asked for by my brother in law (the lazy git)

Chris Murray · 19 January 2006, 23:20

Quote:

Originally Posted by Roy Smith

Hi Chris
Did you get to look at scorpions spread sheet of speeds etc.
It was only that the Suzuki was the quickest engine.

Hi Roy,

No, I didn't see Scorpion's spreadsheet.

To be quickest in terms of acceleration to say 20 kts and top speed - that would be good!

On the other hand, the idea of a 2 stroke (lightweight plus lots of power strokes) appeals to me and if it is anywhere near as good as people say, then I don't think that I shall be disappointed.

I suspect that all of the modern engines are pretty good, with a possible question mark over the Verado's power to weight ratio. So I guess that it may not be critical, whichever one we opt for.

Regards,

Chris.