Fuel usage

Jan 7, 2011
5,746
Oday 322 East Chicago, IN
So I am going out for a few days on the hook next week, and decided to fill my diesel tank since I was down to about 1/4 tank. I thought about carrying a 5-gallon can of diesel, but since I am down to the last few weeks of my sailing season, I decided to fill up.

I have been keeping track of my engine hours in a simple spreadsheet that I keep on my Raspberry Pi on the boat. So I checked it this morning and noted 22.9 engine hours since I launched, and I assume the tank was full (or nearly so) when I launched. I use a burn rate of .5 gallons an hour…so I figured I should be able to get about 11 gallons in the tank without an “overflow “.

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I motored over to the fuel dock and got 9.08 gallons in the tank. I could see foamy fuel in the neck of the hose, so didn’t go too far past that. I did let it settle and tried to add more, but it was full. $35 for the season :cool:

So, using my 22.9 hours and 9.08 gallon of fuel consumed, my burn rate is closer to 0.4 gallons an hour. My normal motor consists of starting the motor, let it warm up while I get the Mack Pack unzipped and halyard attached, throw off the lines and back out if my slip. Then a very short motor out if the marina and out on to Lake Michigan. I point into the wind, crank up the mainsail using my Milwaukee right-angle drill, and fall off the wind. I usually kill the engine and then pull out the jib. All in, my “normal” engine usage is .3 hours a trip…and this in and out of the marina. 18 minutes total, or 9 minutes of engine time each way!

I am very fortunate to be so close to the open waters of Lake Michigan.
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Sometimes I complain about being “painted in a corner” where I have to sail north or east… not much room to go south or west from my marina. But it could be worse. At least I have some decent wind days!

Today was my 53rd daily sail…and over 700 miles sailed this summer. I feel blessed to have gotten that many sails in this summer. There are 2 sailboats on mock that don’t even have sails bent on:banghead:.

As an aside, my old hours meter crapped out this summer…so I started looking for a new one. I searched for one that is on Caterpillar bulldozers and other heavy equipment…I figured if it lasts on a dozers, it should last on my boat (not that my 37-year old one owed me anything).
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This one (purchased on eBay), claims to be the one used by Caterpillar… time will tell.

I hope everyone has been as fortunate as me.

Cheers,

Greg
 
Jan 7, 2011
5,746
Oday 322 East Chicago, IN
When I got back from my sail today, I asked my 2 power boater neighbors if they wanted to see something that would make them cry :poop:

They said they couldn’t start their twin V8 engine boats and warm them up for $35!

They don’t really go anywhere…so they aren’t burning much fuel. I saw one if the put yesterday…watched him come out 1 mile and then he turned around :facepalm: Probably used his fuel allowance for the month :yikes:

but hey, they are good guys and grab my lines every time I come into the slip. Glad they are “dock rats” :cool:


Greg
 
Oct 6, 2007
1,150
Hunter H30 1982 Chicago IL
Sounds like you’ve had a great season. I’ve been out 32 times on my boat plus four times on a friend’s boat so far this season. Haul out this year will be October 1st, a couple weeks early due to autumn travel plans, so I hope to get up to 45 sailing days if the weather cooperates this month.

My harbor is a mile long. It’s 3/4 mile from my dock to the mouth of the harbor. Then I run full throttle at least a mile out to raise and lower sails away from the near shore power boat traffic, and I probably let the engine warm up for about 15 minutes while preparing the boat, so I run my engine roughly an hour every time I go out. Estimating 32 hours plus the seven hour launch day Chicago River delivery puts me at 39 hours total so far this season. My engine has never had an hour meter, so it’s all a guesstimate.

I just topped off the tank for the third time this season yesterday. I never let it get below 1/2 tank. It took 4.25 gallons at $5.029/gallon yesterday. I’ve burned 12.5 gallons so far this season at a total cost of $62.78. I’m at an estimated average burn rate of 0.32 gallons per hour. However, the river delivery is mostly idle speed until the last 40 minutes at full throttle once we’re in the lake, so that plus the length of the harbor at 3 to 4 knots and my longer warm ups probably skew my average burn rate down a bit.
 
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Feb 26, 2004
23,098
Catalina 34 224 Maple Bay, BC, Canada
probably skew my average burn rate down a bit.
No they don't, they just confirm that your use pattern provides you with your usual fuel consumption rate. If OTOH you motored for 45 minutes from your slip to open sailing water like I used to do from Alameda to SF Bay every time I went out, then that's what MY fuel consumption would reflect.
 
Apr 8, 2010
2,150
Ericson Yachts Olson 34 28400 Portland OR
My engine has never had an hour meter, so it’s all a guesstimate.
While our engine panel did have an OEM hour meter, it was old and hard to read. After the repower, I added a new "Hobbs" meter, in a place that was easier to access. It's really nice to have that info to write down when changing out oil or other engine fluids/parts.
 
Last edited:
Oct 6, 2007
1,150
Hunter H30 1982 Chicago IL
No they don't, they just confirm that your use pattern provides you with your usual fuel consumption rate. If OTOH you motored for 45 minutes from your slip to open sailing water like I used to do from Alameda to SF Bay every time I went out, then that's what MY fuel consumption would reflect.
I meant that my longer periods at or near idle speed may skew my burn rate down a bit in comparison to Tally Ho’s burn rate.
 

DaveJ

.
Apr 2, 2013
501
Catalina 310 Niagara-on-the-Lake
I get more miles per gallon than most sailors on this site, but of course, our Canadian gallon in larger!!
Not helpful, just a fact.
 
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