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Jan 23rd, 2013
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Gas mileage went down suddenly #12861570
08/12/18 04:12 AM
08/12/18 04:12 AM
Joined: May 2013
Posts: 3,101
L
Lil joe Offline OP
TFF Team Angler
Lil joe  Offline OP
TFF Team Angler
L

Joined: May 2013
Posts: 3,101
I have a’97 Johnson fast strike that seems to be using more gas than usual the last 3 or 4 times I’ve been on the water. The engine is running perfectly normal. This morning I had 1/4 of a tank, 20 gallon tank, and I made a 4-5 mile run from my last stop to the boat ramp and was pushing e when I got back to the ramp. Any suggestions on possible causes?

Re: Gas mileage went down suddenly [Re: Lil joe] #12861627
08/12/18 12:12 PM
08/12/18 12:12 PM
Joined: Jan 2005
Posts: 1,825
Lake Fork
H
heybaylor Offline
Extreme Angler
heybaylor  Offline
Extreme Angler
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Joined: Jan 2005
Posts: 1,825
Lake Fork
check your boat for water in the hull


heybaylor
Re: Gas mileage went down suddenly [Re: Lil joe] #12862619
08/13/18 01:21 PM
08/13/18 01:21 PM
Joined: Dec 2002
Posts: 3,667
Rockwall, TX USA
Tommy Yetts Offline
TFF Team Angler
Tommy Yetts  Offline
TFF Team Angler

Joined: Dec 2002
Posts: 3,667
Rockwall, TX USA
1/4 tank in 20 gal. tank is 5 gals. Most fuel tank senders are not spot on accurate when getting low. I would fill the tank and see how much fuel was left in the tank when you put it back on the trailer. That will tell the story.


Rockwall Marine
Tommy Yetts

www.rockwallmarine.com
Re: Gas mileage went down suddenly [Re: Tommy Yetts] #12862935
08/13/18 05:09 PM
08/13/18 05:09 PM
Joined: Apr 2004
Posts: 8,345
Rockwall
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Stump jumper Offline
TFF Celebrity
Stump jumper  Offline
TFF Celebrity
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Joined: Apr 2004
Posts: 8,345
Rockwall
Originally Posted By: Tommy Yetts
1/4 tank in 20 gal. tank is 5 gals. Most fuel tank senders are not spot on accurate when getting low. I would fill the tank and see how much fuel was left in the tank when you put it back on the trailer. That will tell the story.
I made 2 or 3 trips to the lake with mine at or below a 1/8. I wanted to see how low it would go before I ran out. Boat was new to me and not sure about the gauge. I never did run it out. I got tired of carrying a gas can with me. In my Ranger I could pretty much predict by the gauge when I needed to switch tanks but it would run for quite a while on E.


2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
Re: Gas mileage went down suddenly [Re: Lil joe] #12863033
08/13/18 06:27 PM
08/13/18 06:27 PM
Joined: Oct 2012
Posts: 4,108
Cash, Texas
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lenahorse Offline
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lenahorse  Offline
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Joined: Oct 2012
Posts: 4,108
Cash, Texas
I usually can fish a day trip on a full tank and predict very close to amount for fill up on way home, very close depending on wind where I went and boat loading. Same for % of batteries used and left.

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