![Reply](/forum/images/sk/buttons/reply.gif) |
21 May 2006, 16:01
|
#1
|
Member
Country: UK - England
Town: solent
Boat name: wilson
Make: jeanneau merryfisher
Length: 5m +
Engine: suzuki df 70hp
Join Date: May 2006
Posts: 70
|
fuel consumption
in my quest for a bigger and better boat, an idea of fuel consumption would be good as i dont want to over stretch in my need for speed. ie
from northeney, hayling island to cowes and back(40 miles?) on my medline 1 4.8 meter with 65hp suzuki i use about £40 flat out where possible.
what do others use use both petrol and deisel over a given distance.
__________________
|
|
|
21 May 2006, 16:11
|
#2
|
Member
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
|
Doing the same journey as you would cost me £20.
__________________
|
|
|
21 May 2006, 16:18
|
#3
|
Member
Country: UK - England
Town: solent
Boat name: wilson
Make: jeanneau merryfisher
Length: 5m +
Engine: suzuki df 70hp
Join Date: May 2006
Posts: 70
|
why do you think their is such a big difference, my engine is 2 stroke, whats yours
__________________
|
|
|
21 May 2006, 19:17
|
#4
|
Member
Country: UK - England
Boat name: SOLD
Length: under 3m
Join Date: Jun 2004
Posts: 794
|
Did Northney though the bridge to cowes and back over the bar
£51 at about 4500 to 5000 knts
__________________
|
|
|
21 May 2006, 19:35
|
#5
|
Member
Country: UK - England
Town: Salisbury
Boat name: Blue C
Make: XS 600
Length: 6m +
Engine: 125hp Opti
MMSI: 235082826/235909566
Join Date: Jan 2004
Posts: 1,439
|
Quote:
Originally Posted by Roy Smith
Did Northney though the bridge to cowes and back over the bar
£51 at about 4500 to 5000 knts
|
|
|
|
21 May 2006, 20:24
|
#6
|
Member
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
|
I do that journey regularly. I have a four stroke 50 HP and keep it about the 4000 RPM mark. I have a 25 Litre tank and I don't use all of it on that journey.
I go up to 5000+ Revs on the odd occasion but find 22 Knots at 4000 is ample. Cheaper on fuel and got to be good for the engine. Plus it means I don't stuff it so often.
__________________
|
|
|
21 May 2006, 20:33
|
#7
|
Member
Country: UK - Scotland
Town: Glasgow
Boat name: The Black Pearl
Make: BRIG F400S
Length: 4m +
Engine: 40HP E-TEC
Join Date: Feb 2006
Posts: 91
|
I can get about 50 miles from my 22Lt tank when cruising with an RPM of around 4000-4500.
Cheers,
Fraser
__________________
|
|
|
21 May 2006, 23:59
|
#8
|
Member
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
|
As much as I know people love 2 strokes on this site in their different variants with my limited knowledge I have found my one and only 4 stroke so far to be absolutely wonderful on fuel consumption.
At the end of the day a 50 HP 4 stroke has as much power as a 50 HP 2 stroke. They are both 50 HP.
The 50 HP 2 stroke is cheaper to buy brand new, is lighter but to someone like me is no cheaper to service. I can change plugs, oil and possibly an impellar. I can't do the cam belt but I also can't muck around with reed valves etc.
For me 4 stroke is the only way to go.
Go on give it a try you know you will love it.
__________________
|
|
|
22 May 2006, 00:01
|
#9
|
Member
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
|
Quote:
Originally Posted by Roy Smith
Did Northney though the bridge to cowes and back over the bar
£51 at about 4500 to 5000 knts
|
I would pay that to be on a 8 metre boat with a group of friends but I wouldn't want to pay it if I was on my own for a bit of a muck around twice or three times a week.
__________________
|
|
|
22 May 2006, 07:35
|
#10
|
Member
Country: UK - England
Town: Southampton
Boat name: Aquaholic
Make: Ribeye
Length: 7m +
Engine: 250 V8
Join Date: Mar 2005
Posts: 1,323
|
Quote:
Originally Posted by Roy Smith
Did Northney though the bridge to cowes and back over the bar
£51 at about 4500 to 5000 knts
|
Not a bad speed for the money!
On a serious note, I don't think I would use that much in mine, maybe about £40 or so.
__________________
|
|
|
22 May 2006, 08:04
|
#11
|
Member
Country: UK - England
Make: extreme 24
Length: 7m +
Engine: merc 6.2 320hp
Join Date: Jul 2004
Posts: 711
|
Quote:
Originally Posted by antiqueboy
in my quest for a bigger and better boat, an idea of fuel consumption would be good as i dont want to over stretch in my need for speed. ie
from northeney, hayling island to cowes and back(40 miles?) on my medline 1 4.8 meter with 65hp suzuki i use about £40 flat out where possible.
what do others use use both petrol and deisel over a given distance.
|
xr2 from northney to cowes and back £70 plus oil £15
__________________
|
|
|
22 May 2006, 11:52
|
#12
|
Member
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,726
|
Couldn't say in terms of miles per gallon but the fuel consumption on my 115 is scary at higher speeds, cruising at 18-20 knots not too bad, go to 25 and it seems to more or less double, go to 30+kt and it seems to double again!!
The tank on mine is about 80-90 litres I would guess (never emptied it completely but have put 60lt in when showing about 1/4 full on the gauge) and I have used 1/4 tank in an hour and a half pottering round mostly at 10-15 knots then another 1/4 tank in about 20 minutes at "yeeha" setting
If I ever had to replace the engine, or ever got another boat, I think I would go for a four stroke on the basis that it must be more efficient (hard to be any worse!!) and the fact that I don't really like 2 stroke engines anyway
__________________
|
|
|
22 May 2006, 16:29
|
#13
|
Member
Country: UK - England
Town: Hoxne
Boat name: Southern Comfort
Make: NorthCraft 5.5
Length: 5m +
Engine: 150 Optimax
MMSI: 235033276
Join Date: Nov 2005
Posts: 122
|
Optimax fuel comsumption
Last trip out, was Felixstowe to Snape and back, approx 42 miles with lots of blasting in waves. used just over £40 of fuel and hardly any oil. cruising at 35kts
After having an Optimax i wouldn't want anything else
|
|
|
22 May 2006, 17:21
|
#14
|
Member
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,884
|
i appear to have the same consumption figures as yourself, using around a litre of fuel per mile but i suspect my oil consumption will be a lot lower given the total absense of smoke from my engine, from a smoke point of view you would think it was a 4 stroke
and that will b cruising around the 35-40 knots range
is a 200 hp opti on a vipermax 6.5
Quote:
Originally Posted by antiqueboy
in my quest for a bigger and better boat, an idea of fuel consumption would be good as i dont want to over stretch in my need for speed. ie
from northeney, hayling island to cowes and back(40 miles?) on my medline 1 4.8 meter with 65hp suzuki i use about £40 flat out where possible.
what do others use use both petrol and deisel over a given distance.
|
__________________
|
|
|
23 May 2006, 08:33
|
#15
|
Member
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,562
|
The two strokes people seem to love on this site are usually new tech 2 stroke and they are great engines. I still think the best engine around is the three pot Yamaha two stroke range (60 -90) but thay can be a bit thirsty.
I chartered an old Yammie 250 2 stroke engined rib last week. Drove 5 people about twenty miles and had about 4 miles of one to one ....... Fuel Bill 93 pounds and 22 pence and that was from a garage not a pontoon. So big old two strokes are not able to compare with 4 strokes.
I've run Opti 150's and 225's and I feel fairly certain that the 150's are more frugal than the 225's ( on a LPH:HP ratio)
Having said all that I manage a floating Jacuzzi (Zebidee) which has a 75 merc 4 stroke and that gets to Yarmoth and back on about 30 litres and that is most impressive
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
|
|
|
23 May 2006, 18:20
|
#16
|
Member
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
|
Rogue wave,
I was also impressed with the consumption on Zebedee. Do you know if all Mariner 75 4 Strokes are like that.
__________________
|
|
|
23 May 2006, 21:01
|
#17
|
Member
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,562
|
I think they probably are Nick, but it depends on boat weight and design also. put that engine on a boat that's a couple of hundred kilo's heavier and the consumption will go to pot.
Interestingly enough I believe that block and gearbox is the same as Benc has on his Tornado, which is a tammie 115. I think they run it at 75 with carbs and 90 100 and 115 with injectors. I am not sure cos I haven't looked at outboard brochures since i got a copy of the Cromwell catalogue. ( and that really is tool porn of the highest calibre ) No you can't borrow the catalogue not even Mark halliday is ready for that much stuff!
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
|
|
|
![Reply](/forum/images/sk/buttons/reply.gif) |
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|