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Pic of suspect gas

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wildfrahm

Contributing Member
Hello, It's me again with the 5.7 with low rpms. fixed and tuned distributor yesterday and took out. No change still cannot get over 2000rpm's. Took son with me so he could drive while I played with engine. One of the last things on cheifalan's list I havn't looked into is fuel. this came out of my fuel water seperator. It was loaded with floting debre as well as being a dark ice tea color, very much unlike the clearer gas color. The flash on my camera makes it appear lighter tham really is, and yes the bottom is full of **** that was floating around.
 

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Yea used the list i posted and then bash's me in another thread, go figure.

Your welcome, oh you didn't say thank you, did you.

You need to clean the system, after sucking the water and gunk off the bottom of the tank, check the filter in the fuel pump if you have one, and the water sep, and the filter that enters the carb.

Me i would run it on a external tank of clean fresh fuel to see if you can get over the 2000 prm mark. Check the psi the fuel pump is giving you also.

Don't bother saying thanks i don't want to hear it or see it grow up.
 
By God you are tough chief! lol But have to admit you are right. Do what chief said and carefully somehow hookup a remote fuel tank with an extended lenth of fuel line in order to rule in or rule out a rotten tank of phase seperated e-10. Pretty simple to do as long as you somehow anchor down remote fuel tank before getting underway. You may have gotten a bad load of fuel at a pump also. Don't rule anything out. Does it smell rank? Looks a bit nasty but hard to be sure from photo. How long have you had fuel in boat? Have you ever run it almost empty and then filled up with fresh fuel. Expensive aint it? I know everyone on this forum has probably at one time or another been guilty of not keeping boat topped off. These things happen whether for cost,time,just plain exaustion from being out on the water all day, etc. (hard to keep up with everything). Anyway, hope you get it running right! all the best, Tom
 
I have had similar problems, both right out of the pump and with aged gas but I am wondering how long the boat sat ? how old the gas was and if it smelled sour. We know it was bad. The safe limit for storage has been set at 6 weeks before deterioration.
 
I have had a bad tank of fuel from a local fuel dock that ran out of fuel I got the next to last tank from them boat ran like h____ . Had to pump tank out 50 gallons at a cost of 10.00 a gallon to pump and dispose of. I now only buy from several fuel docks that only sell Valvtect none ethanol gas with all the additives you need in it. I've been running this fuel since June 1st without any fuel problems. I pulled the fuel filter last week and poured it into a container and left it at the marina before going out after coming back in I looked at it there wasn't spec of anything in it or any water. Here is a link to their site. You may want to give it a try.
http://www.valvtect.com/marineFuelGasoline.asp
 
Chief believe I do thank you on anouther post. Did not dog you on another post. I thought I put reply on this post that I pumped out tank, put in 10 gallons removed fuel sender installed tube in tank raised front of boat as high as possible and put tube in rear of tank and pumped out. Did twice more with 6 gal each time. Replaced all hoses to carb and all new filters including separation. Found other things also but boat is running now. I am getting around 3800+ rpms. Though I crude at around 3000rpms at 20mph most of time.
 
This was gas right from the gas station. I slowly decanted the three gallons purchased for my motorcycle until I got down to one gallon. This was the result. Phase separation.
Lost my pic ? Excuse if you get two ??Bad gas_0557 (Medium).JPG
 
You have already determined that your fuel is old and bad..... correct?

I see little value in using an external fuel tank if your main tank requires attention in the first place!
Save yourself this step, and drain the fuel tank, clean it, examine the pick up tube, examine the anti-siphon valve, replace the main filter and carburetor based filter (if so equipped) and connect everything back together as it should be.

Upgrade your fuel lines at this time........ cost is peanuts relatively speaking.
Add fresh fuel, and test away!

Go a step further, and install a RACOR filter system, and be done with it!



Have you checked the progressive ignition advance up to the "full in" and limit RPM?
Not BASE.... we're talking progressive advance and TA (total advance).

.

 
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