Outboard fuel range

Tin man Johnny

Recruit
Joined
Aug 5, 2024
Messages
4
Hello,
I've been searching online extensively but can't find a clear answer. I have a 6 HP Mercury outboard and want to use a 3-gallon external fuel tank. I'm concerned about fuel economy, especially since I'm planning a trip soon that's over 20 miles round-trip. Can anyone with experience offer guidance on this? Thank you!
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,819
???----Need to post what type of boat you are on !-----Is this trip going to take 2 hrs or 10 hrs ?
 

matt167

Rear Admiral
Joined
Sep 27, 2012
Messages
4,150
2 stroke or 4 stroke? I went 10 miles last year with my 25hp Suzuki and used probably 2 gallons at most. I would get a 6 gallon tank. 4 stroke uses about half the fuel of a 2 stroke in general
 

Tin man Johnny

Recruit
Joined
Aug 5, 2024
Messages
4
2 stroke or 4 stroke? I went 10 miles last year with my 25hp Suzuki and used probably 2 gallons at most. I would get a 6 gallon tank. 4 stroke uses about half the fuel of a 2 stroke in general
It’s a 4 stroke, had a guy tell me a 3 gallon would last around 40-45 miles but don’t see how.
 

Dubed

Petty Officer 1st Class
Joined
Sep 3, 2021
Messages
373
Bring a jerry jug. This trip will give you all the info you need, and you wont run out of fuel.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,548
with wind or against wind
with current or against current
smooth water, or 1-2 foot chop
at idle speed, or wot

all of these things affect the fuel burn rate.

regarding your trip. bring along a bit of extra fuel
 
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