Fuel Flow and Economy Figures

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Post Options Post Options   Likes (0) Likes(0)   Quote El_Robbo Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2008 at 9:38pm
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As you can see from my two reports my consumption has dropped dramatically from my December fishing.  Where we were chopping through 150 - 170 L per day in slight to moderate conditions.  I estimate a saving somewhere between 30% - 40% from cutting back my speed from 7 - 7.5 knots at 2100 rpm to 6ish at 1700 rpm.  After an hour or two it doesnt even seem slow.

In six days fishing spent three hours on a blue, dropped two other stripes and caught three mahi.  Which apart from actually boating the marlin is almost as good as the stats from last year.  Change in boat a big factor but speed I don't think makes a difference.

Thanks Peter P / Roddy I am truly a convert of the 6kn will mean 4 days fishing for the price of 3 which is good news when your mates don't know the meaning of the words "fuel contribution".

PS just got 100hr service on the F225 (now at 640hrs) for $520 impellor, oils, filters, hyd steering check.  Nothing else wrong.  Very happy with that. 

If you are in Auckland and out of warranty I suggest you contact Mark Helms Marine.  I have always been very happy with his work.  He serviced the old Mercury 5 times and I will def be getting him to keep on with the new yammy.  It is never too hard.  He travels and always delivers on time.  If you look after him he will also bend over backwards to get you turned around and back out fishing during the season.  When buying the boat he was always just a phone call away to answer questions about the motor.  In short a top fellow.
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Post Options Post Options   Likes (0) Likes(0)   Quote plastic Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2008 at 8:04pm
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I have a Surtees workmate with the new fuel injected Honda 90 four stroke. I always get around 10 to 12 litres per hour at 4000 rpm traveling at 24 mph. This seems to be a sweet spot and very economical, increase revs to 4500 and the consumption doubles however covering a lot more ground. I get th e same pulling a skier as well.
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Post Options Post Options   Likes (0) Likes(0)   Quote Blue Asparagus Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2008 at 8:25pm
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Joined: 10 Oct 2004
Location: Kerikeri N.Z
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Date: 9th to 12 March
Boat: Ultimate Game
Size: 38ft
Weight: 7 ton
Engine: 220Ford Turbo
Prop diameter and pitch: big lol
Weather conditions and general usage crap weather averaged 12hr days
Fuel used: 4 days 415lt
Trolling speed: 7.5
Other notes worked out at $45 a day for the 3 crew each not to bad at all.
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Post Options Post Options   Likes (0) Likes(0)   Quote lance@driveline.co.nz Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2008 at 10:39pm
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Cry, maybe one day I can have fuel consuption like that :)
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Post Options Post Options   Likes (0) Likes(0)   Quote MJ Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2008 at 8:57pm
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What are you running Wetspot?
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Post Options Post Options   Likes (0) Likes(0)   Quote Tzer Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2008 at 10:00pm
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Joined: 02 Jun 2004
Location: Gisborne. NZ
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Date: 14/2/2008

Boat: Surtees           

Size: 6.1

Weight: approx 1600kg

Engine: 115 4/s Mercury

Prop diameter and pitch: 17P

Weather conditions: Northerly 10kts rising to 20knts

 Hours on water: 10.5hrs

Fuel used: 89L for 77 miles travelled.

Trolling speed: averaged 7knts

Other notes. Trolled all day with about 16miles at cruising speed 23knts. Averaged 1.15L per mile

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Post Options Post Options   Likes (0) Likes(0)   Quote BLACK BETTY Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2008 at 12:27pm
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Joined: 10 Dec 2007
Location: New Zealand
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Points: 63
Date:16.02.08
Boat:ramco fishmaster
Size:19ft
Weight:900kg plus
Engine:90hp johnson 4stroke
Prop diameter and pitch:14-1/4x22
Weather northerly 10knts variable pushing in to swell most of day
Hours on water:11 hours
Fuel used:88litres
Trolling speed:6-7 knots
Other notes 1 and a half hours @ 4000rpm rest at 2300rp-6-7 knots
traveled from gisborne to edge of tolaga total of 162km

Date:17.02.08
Boat:ramco fishmaser
Size:19ft
Weight:900 plus
Engine:90 4 stroke jonny
Prop diameter and pitch:14-1/4 22
Weather conditions south west 10 knots easing.
Hours on water:8 hours
Fuel used:58litres-130 kilometres
Trolling speed:6-knots
Other notes hour at 4000rpm and the rest at 6 to 7 knots trolling






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Post Options Post Options   Likes (1) Likes(1)   Quote skidder Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2008 at 3:57pm
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I hope Mushroom11 you caught fish for 19hours on the water ???
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Post Options Post Options   Likes (0) Likes(0)   Quote Miss Lidgard Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2008 at 4:36pm
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Location: Kerikeri
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Date: 1-2-08
Boat: 4.3m Stabi
Weight: 350kg
Engine: Honda 50hp
Weather conditions and general usage: slight chop with 1m swell. Trolling + 20mins each way @ 22knots / 4500rpm. 1 POB
Hours on water: 6, out from whangamata, around aldermans and back
Fuel used: 18 litres for 38nm travelled
Trolling speed: 6-8knots


Date: 9-2-08
Boat: 4.3m Stabi
Weight: 350kg
Engine: Honda 50hp
Weather conditions and general usage: trolling + 15mins each way @ 25knots / 5000rpm
Hours on water: 6, out from whangamata, to mayor and back
Fuel used: 26 litres for 51nm travelled
Trolling speed: 6ish knots
Other notes: 1.5m swell, variable sea. 1 POB
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Post Options Post Options   Likes (0) Likes(0)   Quote BLACK BETTY Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2008 at 12:35pm
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na mate nuthnk big but was a sad last 2days for most anglers in the comp.only 1 marlin landed  think???and no yellows
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Post Options Post Options   Likes (0) Likes(0)   Quote burwood Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 2008 at 4:18pm
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Trolling at 7.5 knots Im getting about 12LPH from twin 175s-not bad

Pretty linear consumption up to 5000 rpm. 1.8NM per litre overall id say. So downtown to Fitzroy is about 90litres if i take it easy
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Post Options Post Options   Likes (0) Likes(0)   Quote Tzer Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 2008 at 7:41pm
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Originally posted by mushroom11 mushroom11 wrote:

Date:16.02.08
Boat:ramco fishmaster
Size:19ft
Weight:900kg plus
Engine:90hp johnson 4stroke
Prop diameter and pitch:14-1/4x22
Weather northerly 10knts variable pushing in to swell most of day
Hours on water:11 hours
Fuel used:88litres
Trolling speed:6-7 knots
Other notes 1 and a half hours @ 4000rpm rest at 2300rp-6-7 knots
traveled from gisborne to edge of tolaga total of 162km
 
Pretty good figures there, we did the same day out to the Tolaga reef round trip of 99miles for 115 L used, 2hrs at 4800rpm rest trolling at 2800rpm 7-8knts. Weather was great out there light winds but wasnt good conditions coming home from out there 25knts west south westerlies, make me appreciate the boat I have. Didnt see many other 6m boats out there, what boat were you on. Lost one good fish when line broke, had 70+kg yellowfin jumping out of water right beside the boat.
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Post Options Post Options   Likes (0) Likes(0)   Quote BLACK BETTY Quote  Post ReplyReply Direct Link To This Post Posted: 29 Feb 2008 at 7:55pm
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na yea didnt quiet make it to tolaga reef bit worried about amount of gas left but we trolled right from dogs leg right up to tolaga covered most squares on refrence map and went as far as start of needham contracting.saw a bit of action on the water but not much decent.good day but hit the rough stuff you were talking about around the outer gables.black bettys the boat name we were the boat that was at the ramp early sunday morning when you were launching
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Post Options Post Options   Likes (0) Likes(0)   Quote salacia Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2008 at 11:36am
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Date: 20/02/2008

Boat: Bluefin 7.7 hartop ( Salacia )         

Size: 7.7

Weight: approx 2600kg

Engine: Honda 225 Four stroke

Prop diameter and pitch: i think 19

Weather conditions: Northeast  15kts rising to 20knts, 1-1.5 metre swell

 Hours on water: 12.5

Fuel used: 95.6

Trolling speed: around 8-9 knots depending on lures

Other notes. Ran out to kingfish pins for some jigging ..took about a 3/4 running at 20-22 knots, trolled for most of the day then back into the kingfish pins again and ran home at 20-22 knots for just over half an hour...love the motor and very cheap to run...so far in two season two striped marlin boated and another two raised along with lots of kingfish and snapper
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Post Options Post Options   Likes (0) Likes(0)   Quote Sea-Sharpe Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2008 at 10:45am
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Date: 02-03-08
Boat: 5m Mclay Sportsman
Weight: 512kg Hull and Motor 
Engine: Yamah 60HP Four Stroke
Weather conditions and general usage: Getting from A to B - on idle a lot whilst throwing soft plastics around various spots. Fuel used: 16.5 litres for 32nm travelled ? I take it thats okay consumption?

Other notes: Calm Conditions. 1 POB
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Post Options Post Options   Likes (0) Likes(0)   Quote lance@driveline.co.nz Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 2008 at 1:28pm
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latest Wetspot update which is slowly making for happier reading.
 
4 days trolling up at Tuts the average consumption was between 9l-11.5l/hr at 6-7knts excluding high speed getting to or getting from areas. Interesting that when I got down to 4.5knts to slow troll a skip bait and two old blues I was using 5-6l/hr.
 
Average day worked out to 114ltrs for 10 hrs engine time including getting to and from at say 17-20knts
 
getting very happy with that.
 
 
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Post Options Post Options   Likes (0) Likes(0)   Quote Bender Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 2008 at 2:03pm
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Figures from a day's gamefishing at Tutes.
 
Boat "Bender" Ramco 620 Sportfish
Weight 1900kg (includes trailer, not sure what the boat alone weighs)
Engine Yamaha F150, 19 inch standard propeller
 
Weather conditions: Lumpy 1m swell in moring, wind 8 - 10 knots. Wind dropping out early afternoon.
 
2000rpm ... 6.5 - 7 knots. 7.3 litres per hour.
 
2200rpm 7- 9 knots. 7.6lph
 
2300rmp 8 - 9 knots, 9.1 lph
 
Cruising at 4000 rpm, 23 knots, 23.7 lph.
 
Total days fuel used leaving dock 9am and returning 6- 6.30pm, 85.4 litres.
 
Nobody has ever come up with a great idea after a second bottle of water.


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Post Options Post Options   Likes (0) Likes(0)   Quote Dougie Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2008 at 5:59pm
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This is my rig, about 5 metre cat with custom hardtop. (If any one recognizes the hull please tell me who made it! Tauranga I believe)
Anyway, fuel.
Twin 2 stroke Johnson 70's (97-old school)
Prop 14 1/4 x 17pitch cupped
 
6knts - about 8-10 l/h
8knts - about 15l/h !!! At trauling speed one motor or two seems to use the same amount of fuel.
 
4000rpm about 19knts, 26 l/h = approx 0.72Nm/l
5500rpm about 28knts, 40l/h = approx 0.7Nm/l      (She's thirsty!)
 
At 6000rpm economy goes out the window as expected!
 
I think if this rig had twin 90's on it, and taller props so cruise speed was 1000rpm less economy would be better than current! Any thoughts anyone?
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Post Options Post Options   Likes (0) Likes(0)   Quote The Jester Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2008 at 5:57pm
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Groper Fishing at Stephens Is
Date:23-26 April 08
Boat: 'Marooned'  Fryan 580x Pursuit
Size:19ft
Weight:aprox 800kg plus
Engine:115hp Honda 4 stroke
Prop diameter and pitch: Dunno sorry
Weather: 10knts Variable Rising to 15knts then about 20Knts NE
Hours on water: 4 Days (3 nights slept on boat)
Fuel used:110 litres
Total Running Hours:12 exactly
Trolling speed: Little bit for Kahawai n Barracouda at 4Knts
Other notes: Bash out to the Grouper holes in 2m swell (according to the weather
station on Stephens Is).

Navman Fuel Computer Says most Efficient Cruise Speed:
3800rpm  21Knts in Flat Sea With Motor Trimed up and load of 2 people + overnight gear 
for 3 nights + 140ltr Fuel = Uses 16l/h or 0.8l/Nm
With Same load in a 2mtr Swell:
3800rpm  17Knts = Uses 16l/h 0.95l/Nm
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Post Options Post Options   Likes (0) Likes(0)   Quote The Jester Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2008 at 6:18pm
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Oops!!! I meant Grouper Fishing at Stephens Is
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