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| Name: |
MovinFr8
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| Subject: |
GAS GAS GAS GAS GAS GAS
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Date:
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4/18/2008 4:02:25 PM
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We all have to have it somehow......
How about each weekend lets say who has the best fuel prices out on the lake or around the lake......I cant say I would drive far to save $4 but if I am in the area on the lake I might top off that 40gal tank I hate.
What do you folks think?
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| Name: |
twc
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| Subject: |
GAS GAS GAS GAS GAS GAS
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Date:
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4/18/2008 4:51:46 PM
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I bring mine in 5 gallon cans.
Had an interesting exchange with a boat mech yesterday about gas. Seems there have been many boat motors, especially 2 strokes, having engine troubles. The repair shops think the problem is the ethanol mixed with the gas these days. The ethanol will mix with water to a certain degree and doesn't mix so well with the oil. In introducing water to the cylinders, and not mixing so well with the oil, many shops are seeing in increase in burned pistons and other internal problems.
So they are saying if you have a 2 stroke, buy branded (Texaco, Chevron or Exxon) gas. Check to see that it isn't blended with ethanol.
Not trying to start a war, just pass along information. Even the Shell station I stopped at yesterday sells blended fuel. I don't know about the Chevron that is closest to the house.
How bad is diesel Steve? I really haven't even looked.
Peace,
<><
TC
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| Name: |
MovinFr8
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| Subject: |
GAS GAS GAS GAS GAS GAS
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Date:
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4/19/2008 12:05:41 AM
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DIESEL SUCKS ALL OVER< I am sure you have nticed lately at any store....
04/14/08
U.S. $4.059 Up 0.104 from a week ago
tHATS THE NATIONAL AVERAGE, CA IS LIKE $4.23
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| Name: |
CAT BOAT
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| Subject: |
Helpful info.....
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Date:
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4/19/2008 1:35:10 PM
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The Ethynol in the fuel creates higher than normal cylinder head pressures and different burn rates and temps. It also takes a little more Ethynol to make the same power as gasoline, thus at times creating a lean fuel condition. It is a good idea to run premium in any type of performance engine as it is a little more stable. Also, now would be a good time to lower the total timing of your engine by a couple of degrees. This will decrease detonation/pre-ignition from higher than normal cylinder head pressure and temps when running any type of Ethynol blended fuel. We have seen a few valve seat failures due to increase cyl. pressures. And, an occasional piston failure due detonation. I don't know or have heard nothing about water mixing with blended fuel. I don't think that holds any bearing on these types of failures. Hope to see all you guys soon next time we visit your beautiful lake.
Steve
www.cathouseperformancemarine.com
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| Name: |
twc
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| Subject: |
Helpful info.....
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Date:
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4/19/2008 9:02:04 PM
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Thanks Steve. That all certainly makes good sense. I've got a 90hp Mercruiser that has a burned piston much as you describe. Been looking for someone to rebuild it but haven't been in a hurry because of the drought last year and gas prices this year.
Peace,
<><
TC
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| Name: |
CAT BOAT
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| Subject: |
Helpful info.....
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Date:
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4/20/2008 12:44:47 PM
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I'll be glad to make repairs for you. If you need us, visit the website, email or call me.
Steve
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| Name: |
Tahoe
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| Subject: |
Helpful info.....
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Date:
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4/20/2008 10:00:40 PM
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CAT, Ethanol absorbs or mixes with water, therefore ethanol blended fuels absorb more water than non-ethanol blended fuel. If the water/ethanol separates from the gas and burns in the engine this will cause what you are describing. Check out the article on this issue....
URL: http://www.epa.gov/OMS/regs/fuels/rfg/waterphs.pdf
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| Name: |
Tahoe
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| Subject: |
Helpful info.....
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Date:
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4/20/2008 10:20:27 PM
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If significant amounts of water are present in a fuel tank with gasoline that contains ethanol, the water will be drawn into the fuel until the saturation point is reached for the three-component mixture of water + gasoline + ethanol. Beyond this level of water, phase separation could cause most of the ethanol and water to separate from the bulk fuel and drop to the bottom of the tank, leaving gasoline with a significantly reduced level of ethanol in the upper phase (see Figure 1 below). If the lower phase of water and ethanol is large enough to reach the fuel inlet, it could be pumped directly to the engine and cause significant problems. Even if the ethanol water phase at the bottom of the tank is not drawn into the fuel inlet, the reduced ethanol level of the fuel reduces the octane rating by as much as 3 octane numbers, which could result in engine problems.
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| Name: |
CAT BOAT
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| Subject: |
Helpful info.....
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Date:
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4/21/2008 10:35:03 PM
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"If the lower phase of water and ethanol is large enough to reach the fuel inlet, it could be pumped directly to the engine and cause significant problems" <<<< copied from previous post. >>>> Now, Same senario with proper service (fuel filter/water seperator) along with all the other maintainance that should be done on a regular basis should this ever come to this? Sounds to me like it should never/ever come to this stage. Yea, I can agree with the link if some boat/car owner never did ANY proper maintanance and let his fuel system get this bad to begin with! Most performance (and we don't see too much others but would like to) boaters never will have this condition. I will and have always encouraged all boats/owners to do complete service (expensive I know) every year. I know it cost money, but far less than a box of broken parts. The same can be said, trust me on this, your car will be in the same condition if you neglect regular service intervals which MOST people don't. Most of boaters will only have work performed on their boat when it breaks down, and they end up on the downwind side of a tow rope. Not ruffling feathers, just calling it like I see it. If you are going to operate in the "gray area" tune it for that. Nice article by the way. I enjoyed the info. Thanks.
Steve
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| Name: |
CAT BOAT
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Helpful info.....
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Date:
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4/21/2008 10:36:22 PM
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Why would you have that much water in the tank? Not sure I understand here!
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