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Author Topic:   Montauk Gas Mileage
triblet posted 08-29-2001 10:06 AM ET (US)   Profile for triblet   Send Email to triblet  
I got an e-mail from a fellow who is looking
at buying a new Montauk. It has a 24 gallon
tank, and the dealer told him it would give
him 300 mn range. That's 12.5 nautical miles
per gallon.

I get about 4 nMPG with my Montauk with
an Evinrude 90HP carbed 2 stroke. I suspect
this boat has a 70HP 4-stroke. I know the
4-strokes get better gas mileage, but 3x
better????

Chuck

Bigshot posted 08-29-2001 10:18 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I would call BS on that but in smooth conditions my Montauk with a 90Yamaha gets about 6-7mpg. I doubt you would be able to double that though. 4 strokes are not that good unless he was referring to trolling speeed. Then a definate yes.
Dick posted 08-29-2001 10:39 AM ET (US)     Profile for Dick  Send Email to Dick     
I've got to go with Bigshot on this one.
I have never run a fuel consumption check but I'm sure my Montauk with a Merc 50/4 stk doesn't come close to that.
alvispollard posted 08-29-2001 12:51 PM ET (US)     Profile for alvispollard  Send Email to alvispollard     
IMPOSSIBLE! My 8 hp four stroke maybe but no 50-100 four stroke or 2 stroke can do that. That is just salesmen talk. 5-6 mpg average with 100 two stroke.
Eric posted 08-29-2001 02:29 PM ET (US)     Profile for Eric  Send Email to Eric     
Well hold on, just keep an open mind for a minute. Where do YOU mount the sails on your montauk?
Easy E posted 08-29-2001 07:48 PM ET (US)     Profile for Easy E    
HaHa...put that in your pipe and smoke it
Kim posted 08-30-2001 08:39 AM ET (US)     Profile for Kim  Send Email to Kim     
I run about 40 miles and burn 5.2 to 5.7 gal. suzuki 70 4/stk rpm 3300 to 4400. it is about one gal an hr.
kim
Bigshot posted 08-30-2001 09:38 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Impossible. Stats on a 60hp Suzuki 4 stroke is 2.2gph at 3950 rpms.
Kim posted 08-30-2001 08:35 PM ET (US)     Profile for Kim  Send Email to Kim     
Bigshot. I wasn't guit cleer with my hrs/gal/per/hr. not all of the time was running at that speed. I guess what I was trying to say was on a round trip of 40 miles (to & from) fishing grounds and some running at LOWER speeds 1000 to 2000 on the grounds the over all was about one gal per hr. going out at 3300 coming in at 4400 . but that still is very good milage I think. would be better if I could use a 50hp. but it would be under powered ..
lets see if gaviso (s/p) can tell us what he is getting? on his new DF70.
kim.
gvisko posted 08-30-2001 11:01 PM ET (US)     Profile for gvisko  Send Email to gvisko     
kim its GVISKO or george

here is my input on the suzuki efi 70 hp

2500 rpm 1.6 gph

3500 rpm 3.0 gph

4500 rpm 4.5 gph

5800 rpm wot 7.5 gph 35mph on gps

hope this helps gvisko <>< <><


Kim posted 08-31-2001 08:53 AM ET (US)     Profile for Kim  Send Email to Kim     
GAVISKO thank you for the reply ! is this that you are getting with yours? so how many miles gan you go on say 5 gals of gas ? ithink you might be surprized (s/p) if you were to watch your hrs and fuel. I dont know how the water condions where you are.
if you are water skiing with WOT ya ! you might be right.
but I stick tith my gal per hr. have gas recips and hrs that i've put on them every trip . 40 miles 33out&44in and lower rpm fishing works out to gal per hr. thats what i'm getting. after all was not the ? how maney miles can per gal...
kim
Bigshot posted 08-31-2001 09:54 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Sorry! You mean avg per tank? My hydra-sports burns roughly 11 gph @ cruise. My avg GPH per tank is somewhere in the 7-8gph range and I never troll, so yes if you were doing trolling, etc you might avg that. I was on my buds 15 Palm Beach the other night tarpon fishing and "he" said the stats are 2.2 for his Suzuki 4 60hp. I thought that was a bit low but then again my 1984 60hp 2cyl Johnson burned less than 3 @ cruise on a 15'sport. On a Montauk you will burn more due to weight. My 14 Carolina with a 30 Yamaha burned roughly 1.5gph @ 20mph. My 90 Yamaha @3700 burns roughly 4. Hope this helps and was not trying to be rude or anything.
yankee posted 08-31-2001 06:05 PM ET (US)     Profile for yankee  Send Email to yankee     
12.5 mpg. That is about correct. I usually get that pulling my Montauk with the truck.
rwest posted 09-01-2001 06:09 AM ET (US)     Profile for rwest  Send Email to rwest     
I run a 50 Merc 2 stroke on my 35 year old Nauset. I ave. 4 NM / gal. whic gives me a total range of just over 100 NM on my 28 gal. I run an aver aday of 8 hr and cover about 25-35 NM on a normal safety partol burning about 5-7 gal unless I end up doing a tow.
Kim posted 09-02-2001 10:50 AM ET (US)     Profile for Kim  Send Email to Kim     
first to (George) GVISKO I so sorry about the spelling.I transpose things all the time please for give me. I wont do it again.
Bigshot I'ts not my intenshun (s/p) to be rude...
I have a hard time spelling and some times things a'm trying to say do not come out the way I want them to. when I was 7 years old. I got hit by a car and almost died. in this I missed a lot of school hence my spelling problem amoung others.two big of a list..
now what I did yesterday was to add up the way points.
I was mistaken on the milage. It was 38.87 miles not 40 as close as I can figure. now it goes like this.
3.25 miles out of bay @ 22/2300 rpm.

15 miles to fishing grounds @4200 rpm.

2.37 miles fishing at less that2000 rpm.

15 miles back to port at 48 to 4900 rpm. (fast)

3.25 miles back to dock at 2200 rpm.(cut rpm 100 becouse of harbor police)
fuel burnt 9/1/01 5.848 gal.
time on hrs. gage 6.1 hrs.

my boat is set to 5200 WOT.
so as you can see by the rpm in & out the sea was flat. with this in mind/ I figure I have 24 gals on board and can run 24 hrs. ??? I've made this trip 23 times this year. and about the same last year.
so as far as miles I used 5.848 for 38.87 miles that is 6.6467168 miles a gal. or am I wrong?
kim.
O BTW I met a guy from the group yester day at the dock.

llewellyn posted 09-05-2001 06:01 PM ET (US)     Profile for llewellyn  Send Email to llewellyn     
90hp 2002 Merc. 2stroke on 1988 Montauk. 3200rpm,20mph by gps, 18.6 miles(24mph by fishfinder), 54 minutes,
ran out of 3gal of gas: 6.1mpg and 3.3gph
Bigshot posted 09-06-2001 09:50 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Kim I was the one who sounded rude by saying impossible, not you. Again I am rude, something does not sound right. Your time out and in is roughly an hour(15 miles x 2 at roughly 30mph). The rest of the 9 miles took 5 hours at 2300 rpms? That is less than 2 mph. You would drift faster than that. Check again, I think your hour meter is off or you left your key on with the engine off, etc.
BobNH posted 09-09-2001 09:37 PM ET (US)     Profile for BobNH    
Here's a datapoint from a Montauk with a Honda 90: According to my GPS, I covered 31 miles today. I almost completely emptied a 6.6 gallon tank that I slightly overfilled, so let's call that 6.6 gallons. That means I got 4.7 MPH. How does that sound?

We cruised around at about 4000 RPM for the most part, except when my son insisted on alternately gunning the engine and then slowing down abruptly. I hate it when he drives! :-)

We hit 36 MPH @ 6000 RPM (with my son driving) with four passengers weighing about 500 lbs and one full gas tank.

I think this means that I could do a little better by choosing a prop that wouldn't allow the tach to get quite that high at WOT.

Does anyone else out there have a Montauk with a Honda 90, who could advice me on prop size? I can't tell what my current prop is, so I'll have to ask the dealer what they put on it.

Bob

FISHNFF posted 09-16-2001 01:37 AM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
Hello BobNH. I have a 1998 17 Alert with a Merc 4S 90, two batteries, 6 and 11 gallon tanks. Alert is 150lbs more than Montauk. I ran a trip where I drove a friend up to a marina to pick up his boat and back. Ran 17 miles up 4000-5000RPM, then 3 miles at 1000RPM in canal. Dropped him off and ran back 4000-5800RPM same distance. Had a couple ounces left. Pretty calm. Six gallons for 40 miles, just under 7MPG. On a recent tuna trip, loaded with 46 gallons fuel, two persons, one 40 gallon barrel half filled, three 120 ice chests filled with tuna, ice, and water, I traveled 30 miles out, trolled 50 miles at about 1600-1800RPM, and back 30 on 20.5 gallons. A little better than 5MPG in calm seas.
FISHNFF posted 09-16-2001 01:42 AM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
By the way, WOT is 38.2 knots WAAS GPS @5800RPM with new Ballistic 17"SS prop. Great hole shot. With your 2.07 #13 lower unit, you should turn a 19". Salt Water Sportsman ran a test of a Montauk and a 90 Honda in 1997 or 1998 and used a 19" prop and got 45MPH and 6.7MPG with one battery, one 6 gallon tank, and two adults. If I find the article I will give you details.
Whalerdan posted 09-16-2001 03:07 AM ET (US)     Profile for Whalerdan  Send Email to Whalerdan     
Someone please correct me if I'm wrong here, but it would seem that Gallons per Hour would be better used for comparison than MPG. Currents and wind could really effect MPG.
FISHNFF posted 09-17-2001 02:10 AM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
You are correct Whalerdan, GPH is the accepted way of measuring fuel consumption. It's just that MPG are easier for the common man to relate to. I know what you mean about variables. A 1 hour trip out might take 2 hours to return in bad weather, reducing MPG by about half.
Bigshot posted 09-17-2001 10:41 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I never heard of anyone refering to MPG until a couple years ago. We always refered to GPH. I have owned some boats that I should have used MPG because a 7.5hp burns so little it is almost impossible to measure(1/3, 1/2?GPH). 3 gallon tank would last a whole weekend. I always use GPH.
BobNH posted 09-19-2001 09:47 PM ET (US)     Profile for BobNH    
FISHNFF,

I took my Montauk out last weekend, and refilled the tank that I thought I had completely emptied on my last trip. It took 5.42 gallons to fill it. So, it looks like I got 5.7 MPG, rather than the 4.7 MPG that I reported in an earlier reply.

I still haven't called the dealer to find out what size prop I have. It takes off like a bat out of hell with four passengers (~500 lbs) and 2 full 6.6 gallon tanks, and tops out at around 37 MPH. I haven't done a speed run solo yet. If I could match the 45 MPH that was reported in the article that you quoted, I would be totally psyched!

Bob

FISHNFF posted 11-15-2001 01:08 AM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
Here's an older mileage thread I thought I'd bring up.

Hey BobNH. How's your boat running?

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