What do you do about bad gas (fuel, that is)?

nphilbro

Petty Officer 1st Class
Joined
Dec 19, 2011
Messages
304
On our way to the lake this morning I filled my 6 gallon plastic can and 2 1/2 gallon backup since there is nowhere to get fuel on or near this little lake.

We left the dock headed to the other end of the lake. About 5 minutes in my 200 lost speed and power then completely died a few seconds later and then wouldn't restart, even with my 2 gallon backup tank there was not a hint of firing off. I thought, "great, lost a powerpack or rectifier." We drifted to about 20ft from shore where I anchored, pulled the hood and checked the plugs (yep, carry one of those with me). Spark on all six. Whatever, I lowered my kicker (9.9 EV), started it up and made it to about 150 yards from the dock and it died too and wouldn't restart. Anchored again and pulled the hood on the kicker, sprayed fuel into the carb where it would start and die. I rowed to the dock since I new the carb was fubard now.

I got another small can out of my car to make an "extreme carb cleaning mix" and squeezed some fuel into it from the smaller tank. I looked at the gas before adding anything to it and there was a whole bunch of dirt and grit in it. I swirled it around and dumped it back into the can and made sure it was clean and pumped more in from the big can. A bunch more grit!

I must have gotten the literal bottom of the barrel at this po-dunk station.

We I took two 2 1/2 gallon cans to a station 15miles away and filled them. I connected new fuel lines from a roll I keep in my car and mixed up a 1/2 gallon of my carb blowout treatment fuel mix (stabilize very rich and seafoam with 100:1 oil), pulled the plugs on both motors, squeezed through new fuel, blew fuel into the the carbs, gave them a few dry cranks, replaced the plugs and got both motors going. Pulled off the dock to not choke out the people fishing with my exhaust cloud and gave it he11. Burned through the treatment mix, attached the new cans and we were good for the day.

What can I do about all this gas? I can't just dump it, obviously. I remembered later that I punched a hole in the water separator last week pulling my old motor and had to bypass it Thursday morning. Will a new water separator filter this grit out (the fuel probably has a high water content too)? I have a plastic fuel siphon pump that comes apart and I've thought about trying to run it through a coffee filter somehow or stuffing a big wad of cheese cloth in the siphon's chamber. My hull tank is 50 gallon cap. and empty so I could filter it into there through the siphon pump. I'm not as worried about recovering the $30 I paid for the fuel as I am really needing the tank space but don't want to completely foul my hull tank either. I don't want to buy another 6 gallon tank because I rarely use the one I have.

Any other suggestions?
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: What do you do about bad gas (fuel, that is)?

One suggestion is to stop using 100:1 fuel/oil mixture - especially in the big motor.
 

nphilbro

Petty Officer 1st Class
Joined
Dec 19, 2011
Messages
304
Re: What do you do about bad gas (fuel, that is)?

The 100:1 is only for the carb soak-blast. It was a little less than a 1/4 gallon in this instance on the big engine and run long enough to push it through low to high speed jets to clear them. A little more on the kicker since it was a bit tougher.
 

jus4funn2010

Seaman Apprentice
Joined
Aug 30, 2010
Messages
49
Re: What do you do about bad gas (fuel, that is)?

New fuel water seperator filter, Id put a couple inline filters too. But, I don't think you have any choice but take the carbs apart and clean them maybe the fuel pump too.
 

nphilbro

Petty Officer 1st Class
Joined
Dec 19, 2011
Messages
304
Re: What do you do about bad gas (fuel, that is)?

New fuel water seperator filter, Id put a couple inline filters too. But, I don't think you have any choice but take the carbs apart and clean them maybe the fuel pump too.

Agreed. My guess is that 2 of 3 low speed jets opened up based on idle speed. I was idling when it clogged so it makes sense. There is a bit of a dead spot with vibration that was present from first operation of this motor a couple of days ago between low and high speed jetting and there is probably other stuff going on in the carbs as well. I'm just going to pull it from the lake today and take care of all of the stuff. Running a "new" old motor generally presents surprises you'll only catch on the water. New plugs and giving the carbs a detailed cleaning when pulled apart will be just good practice. Yet another reason I thoroughly test on a small lake before hitting the salt water.

I guess I'll just take the fuel to Autozone for recycling. I have a couple of gallons to run the kicker and get to the launch.
 
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