Reply
 
Thread Tools Display Modes
 
Old 09-20-2011, 08:17 PM   #21
Art
Guru
 
Art's Avatar
 
City: SF Bay Area
Country: USA
Vessel Model: Tollycraft 34' Tri Cabin
Join Date: Feb 2011
Posts: 7,979
RE: Fuel Capacity

34' Tollycraft at 17,000 lb. when dry, approx 21,000 fully loaded.* Twin 350 cid / 255 hp Mercruisers in tuned, top running*cond. Two 100 gal*alum gas tanks = 200 cap:

Either engine running alone and*traveling quite*slow (5.9 to 6.2 knts)*avg near 3 nmpg.

Both engines running...*at*6.7 to 7.3 knts (just below hull speed of 7.58 knts) we avg 2 + nmpg.**

Fully on plane at 16 +/- knts she gets 1 +/- nmpg; but*that can quickly get expensive these days.*

Higher rpm, quads begin to open -*never tried it long enough*to calc nmpg, probably can't count that high anyway - LOL.*

But... when speed is necessary she will top out*(WOT / 4,500 rpm) at over 21 knts.* So far only had to stress her real hard once to solve*a potentially disastrous developing*situation of dumb boaters while we were helping to usher Tom Perkins Maltese Falcon under Golden Gate Bridge and into SF Bay.* I kept her nearly opened up for a couple minutes, until out of the danger zone!* Only other time I hit WOT was during sea trial, then held her just slightly back at 4,400 for*a few*minutes.* I would not doubt that 40 to 50 gph is her fuel consumption at that speed... OMG!

Currently, due to weight/nmpg results, we generally cruise at or below hull speed keeping tanks under 50% full and put some gas in at 15 to 20% reserve.* Soltron fuel additive has worked wonders for our fuel system.* Weve been using it for a couple years and our fuel stays fresh with no water and no gunk build up, such as previously would occur.* During first half year of use Soltron cleared up gas problems wed been experiencing on regular basis... and has kept it that way!* Also great for diesel.*http://www.soltron-gtr.com/english.htm

So... Our Crusing Range(s):
-****** At 6.2 knts; well below hull speed w/ one eng running... 500 +/- miles
-****** At 7 knts; just below hull speed w/ both eng running..... 350 +/- miles
-****** At 16 knts on full plane............................................. ....... 175 +/- miles
-****** At nearly WOT .................................................. ............... Forget About It!! *
__________________
Advertisement

Art is offline   Reply With Quote
Old 09-20-2011, 08:28 PM   #22
Guru
 
Keith's Avatar
 
Vessel Name: Anastasia III
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,716
RE: Fuel Capacity

700 gallons on my Krogen 42.
__________________

Keith is offline   Reply With Quote
Old 09-20-2011, 08:36 PM   #23
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 4,813
RE: Fuel Capacity

In the continuing search for a trawler, I'm often amused by liquid capacities.

When looking at fuel capacity, I tend to think of it more in cruising range. For what I envision as cruising, more than a thousand mile range seems excessive.

Then I wonder why a boat with a 2,000 mile range at 7 knots (700 gallons), only holds 200 or 300 gallons of water. Think I'd be a lot happier with 300 gallons of fuel and 700 of water.*

Ted
O C Diver is online now   Reply With Quote
Old 09-20-2011, 08:47 PM   #24
Senior Member
 
HeyJude's Avatar
 
City: Boerne, Tx
Country: USA
Vessel Name: HEY JUDE
Vessel Model: Kadey Krogen 36 Manatee #46
Join Date: Jan 2011
Posts: 220
RE: Fuel Capacity

280 gal...burn 1 gph at 7 mph. Theortical range 1950 miles
HeyJude is offline   Reply With Quote
Old 09-20-2011, 10:57 PM   #25
Guru
 
Daddyo's Avatar


 
City: Cruising East Coast US
Country: USA
Vessel Name: Grace
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 2,441
RE: Fuel Capacity

Quote:
O C Diver wrote:
In the continuing search for a trawler, I'm often amused by liquid capacities.

When looking at fuel capacity, I tend to think of it more in cruising range. For what I envision as cruising, more than a thousand mile range seems excessive.

Then I wonder why a boat with a 2,000 mile range at 7 knots (700 gallons), only holds 200 or 300 gallons of water. Think I'd be a lot happier with 300 gallons of fuel and 700 of water.*

Ted
*


OK, 1,100 fuel and 500 water. twin 120 Lehman, range at 1400 cruise a really long ways.
Daddyo is offline   Reply With Quote
Old 09-21-2011, 01:38 AM   #26
Senior Member
 
belizebill's Avatar
 
City: Caye Caulker
Country: Belize, Central America
Vessel Name: Irish Miss
Vessel Model: 36' Marine Trader, D C
Join Date: Nov 2010
Posts: 227
RE: Fuel Capacity

36' Marine Trader ,1979, 120 HP single, two tanks @ about 144 gals each. 1.5 gal. per hour @7 knots@1800rpm,dead calm with a wind on my arss.BB
belizebill is offline   Reply With Quote
Old 09-21-2011, 03:36 AM   #27
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,518
RE: Fuel Capacity

Who cares about gallons? , what matters is RANGE!

My guess would be your 200G would give 100+ hours of operation at at least 5.5K. With or without a noisemaker.

550 miles of range should be fine for an inshore cruiser.

Blue water does take big tanks which reduces the room in the vessel, and can cause huge problems with storing the fuel as it might decay.
FF is offline   Reply With Quote
Old 09-21-2011, 05:05 AM   #28
Guru
 
Keith's Avatar
 
Vessel Name: Anastasia III
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,716
RE: Fuel Capacity

Quote:
That's why they make watermakers.

*

O C Diver wrote:

In the continuing search for a trawler, I'm often amused by liquid capacities.

When looking at fuel capacity, I tend to think of it more in cruising range. For what I envision as cruising, more than a thousand mile range seems excessive.

Then I wonder why a boat with a 2,000 mile range at 7 knots (700 gallons), only holds 200 or 300 gallons of water. Think I'd be a lot happier with 300 gallons of fuel and 700 of water.*

Ted
*
Keith is offline   Reply With Quote
Old 09-21-2011, 05:26 AM   #29
Guru
 
Tom.B's Avatar
 
City: Cary, NC
Country: USA
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,153
RE: Fuel Capacity

I'd give up half of my supposed 300g fuel capacity for more bilge storage... and may yet someday.
Tom.B is offline   Reply With Quote
Old 09-21-2011, 06:04 AM   #30
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
RE: Fuel Capacity

Thanks for the replies. They are really all over the place it seems. I just cruise the Atlantic ICW so I'm not really that far from a fuel supplier, but I have little confidence in the fuel gauges so I'm uncomfortable once they get down below 1/3 for each tank. Also, for some reason, I seem to be pulling more fuel from one tank than the other (or returning more fuel to one tank) and running one dry would suck air and create a problem.

The owners manual goes into detail about the compromise of more fuel capacity vs. less weight, but it looks like they could have made the tanks wider and increase the capacity by 30 gallons or so, something I would be more comfortable with.

My cruising involves tidal currents so I might be doing 9 knots at 2K RPM or I might be doing les than 5. With the inlets on the ICW, this can change a couple times in a day.

All in all, it's a minor thing, I love the boat.
rwidman is offline   Reply With Quote
Old 09-21-2011, 06:45 AM   #31
Guru
 
timjet's Avatar
 
Join Date: Apr 2009
Posts: 1,905
RE: Fuel Capacity

My 24,000 lb Carver 35' ACMY (40' LWL) Cummins diesel holds 330 gallons in 3, 110 gal tanks.

At 2300 rpm and 19 kts I get 1 Nmpg

At 1400 rpm which is displacement speed, I get 1.36 Nmpg and 8.3 kts.

Single engine at 1400 rpm I get 2.5 Nmpg and 7.2 kts.

There are many no wake zones in FL and I usually cruise single engine when in these zones, swapping engines every 20 minutes.

However I figure on average 1.5 Nmpg and with a 25% reserve that gives me a range of 375 miles. This is probably a little optimistic however. Admiral likes to go fast with comments like "We're not on our sailboat anymore"!

We cruise the intercoastal so have no real need for long range capabilities, fuel stops are generally less than an hour away. Besides this is no blue water boat.

*

*

*
timjet is offline   Reply With Quote
Old 09-21-2011, 07:03 AM   #32
Guru
 
Fotoman's Avatar
 
Join Date: Nov 2009
Posts: 621
RE: Fuel Capacity

The original tanks were replaced and the new ones hold a total of 100 galons. More than enough for coastal cruising. This year I installed a 20 galon day tank. It makes it easier to manage fuel consumption and it gives me a bit more fuel capacity.
Fotoman is offline   Reply With Quote
Old 09-21-2011, 10:08 AM   #33
Senior Member
 
Great Laker's Avatar
 
City: Spring Lake, MI
Country: USA
Vessel Name: Great Laker
Vessel Model: American Tug 34
Join Date: Jan 2011
Posts: 320
RE: Fuel Capacity

The American Tug (34 ft)*fuel capacity is 400 gal (2 - 200 gal tanks).*

At 7.5 Knots, she burns*2.1 GPH for a max range of*1643 miles, getting 4.1 mpg.*

For perspective, one could run from Chicago to Mobile on about 2/3 of a tank.*

While I don't need nearly that much capacity, it does make it easy to look ahead and choose a fuel stop based on lowest price.*

*
Great Laker is offline   Reply With Quote
Old 09-21-2011, 10:09 AM   #34
Guru
 
koliver's Avatar
 
City: Saltspring Island
Country: BC, canada
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 2,167
RE: Fuel Capacity

600 US Gals fuel, which, at 8 knots, gives me 1200+ mile range. In july I refuelled (1200 litres) and will likely refuel again before next july. The reserve is nice when prices are all over the map, as they have been for the last while. I was able to wait till I got to a place where the fuel was a little cheaper.
300 US Gals water, lasts two weeks without having to conserve, 3 weeks if we can bathe in the salt water. We do refill whenever we get a chance, as you never know when the next opportunity will present.
koliver is offline   Reply With Quote
Old 09-21-2011, 10:28 AM   #35
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
RE: Fuel Capacity

Quote:
Great Laker wrote:
The American Tug (34 ft)*fuel capacity is 400 gal (2 - 200 gal tanks).*

At 7.5 Knots, she burns*2.1 GPH for a max range of*1643 miles, getting 4.1 mpg.*

For perspective, one could run from Chicago to Mobile on about 2/3 of a tank.*

While I don't need nearly that much capacity, it does make it easy to look ahead and choose a fuel stop based on lowest price.*

*

But how much would it use to run from Mobile to Chicago?*
*
rwidman is offline   Reply With Quote
Old 09-21-2011, 11:28 AM   #36
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,361
RE: Fuel Capacity

For the 2600 nm round trip to Alaska from Sidney BC, the DF 48's *820 gal *useable is pretty good. I prefer +1/2**load for ballasting. If I wasn't taking long journeys, I'd still have a Searay trailer boat.
sunchaser is offline   Reply With Quote
Old 09-21-2011, 01:10 PM   #37
Guru
 
Moonstruck's Avatar
 
City: Hailing Port: Charleston, SC
Country: USA
Vessel Name: Moonstruck
Vessel Model: Sabre 42 Hardtop Express
Join Date: Nov 2008
Posts: 7,848
Fuel Capacity

450 gal. in one tank.* It seems about the right amount.* Leave the East coast of FL and cruise to the Abacos and putter from anchorage to anchorge plus a few marinas for a few weeks*on 300 gal.*

At 27 knots get .95 to 1.0 mpg.* That includes idling time at bridges and slow zones.* So it is not all 27 knots.* Slightly less*if the seas are running a little high.* Measured distance against gallons used is the*best way I know to figure it.*


-- Edited by Moonstruck on Wednesday 21st of September 2011 01:11:44 PM
Moonstruck is online now   Reply With Quote
Old 09-21-2011, 02:08 PM   #38
Senior Member
 
Dswizzler's Avatar
 
City: LaPaz ,Mexico and the Sea of Cortez
Vessel Name: Delta Swizzler
Vessel Model: 1988 58' Vantare
Join Date: Feb 2010
Posts: 215
RE: Fuel Capacity

I want to fuel up where Capt Jerry gets his fuel ,

the boat that* i run holds 1600 gals, just fueled it up and it took 1176 gals* for 3,0150dollars,= $2.56 a gallon

*

Delta Swizzler holds 1400 gallons in two 700 saddle tanks. I can be alittle picky when and where I get fuel, but when I stop, I'm there for awhile. DD 6V92's are alittle thristy but they push the boat along well if need be, but I have more time then money so we putt pretty slow. Price of fuel at my marina in California is $3.94 so $2.56 looks really good from here.*
Dswizzler is offline   Reply With Quote
Old 09-21-2011, 02:59 PM   #39
Guru
 
skipperdude's Avatar
 
City: Whittier AK
Country: USA
Vessel Name: Apache II
Vessel Model: 1974 Donald Jones
Join Date: Oct 2007
Posts: 3,147
RE: Fuel Capacity

Quote:
Dswizzler wrote:
I want to fuel up where Capt Jerry gets his fuel ,

the boat that* i run holds 1600 gals, just fueled it up and it took 1176 gals* for 3,0150dollars,= $2.56 a gallon

*
*Man you have it made my fuel cost is $4.27 per gallon
skipperdude is offline   Reply With Quote
Old 09-21-2011, 03:44 PM   #40
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
RE: Fuel Capacity

The last diesel I got was $2.59 per gallon on the ICW (anout a month ago) in SC. Actually less than what it was selling for at the corner gas station. It's too far away for my regular stop, though.
__________________

rwidman is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
1978 34' - dip fuel tanks to measure fuel? meridian Marlow - Mainship 6 10-14-2011 11:52 AM
Fuel gauge for hard to get at fuel tanks on a 1980's Trader 39 Trawler Yacht Ian Streten Electrical and Electronics & Navigation 11 08-26-2011 04:20 AM




All times are GMT -5. The time now is 06:22 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012