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Ethanol is the problem. Not on the rubber however.
The Etoh. attacks the binding adhesive between the layers of rubber. That's where the issue is.
Also, you will read on the fuel pump that the fuel contains "UP TO" 10% Ethanol.
That does not always promise there is 10%.
A manual switch is a good idea for many reasons. The boost in power is one... That's not a boost from not using that vacuum. It's a boost in fuel flow. The inner workings of a manual valve are larger, and constant. The vacuum vale (OEM) has smaller orifices, and is a pulsed flow of fuel.
Last... Stabil Blue is the formula that neutralizes the Etoh. Back when ethanol was new to fuel (10 or so years ago) you could not store a boat over the winter with ethanol in the fuel. It would destroy fuel systems from the fuel tank to the carb. Stabil Blue was the answer back then.
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To explain my "User name"...
I thought Hill' had this in the basket. Obviously she can't do anything right.
It's OK tho... Dear Season is coming bitches!!!
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