Issues with ethanol as an additive in non road motor fuel
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Issues with Ethanol as an Additive in Non- Road Motor Fuel. IBEX Presented By: John McKnight, NMMA. Ethanol GASOLINE. What are the effects of ethanol. Alcohol is a solvent Effective cleaning agent It will clean the boat fuel tank and the marina’ s fuel tank. Alcohol absorbs water

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Issues with Ethanol as an Additive in Non- Road Motor Fuel

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Issues with Ethanol as an Additive in Non- Road Motor Fuel

IBEX

Presented By: John McKnight, NMMA


Ethanol GASOLINE


What are the effects of ethanol

  • Alcohol is a solvent

  • Effective cleaning agent

    • It will clean the boat fuel tank and the marina’ s fuel tank.

  • Alcohol absorbs water

    • It will dry out materials if they are not designed for ethanol (gaskets / hoses) and it attracts water into the fuel

  • Alcohol separates from fuel more readily than MTBE or toluene

    • When it separates from solution it will evaporate more readily and that will lower the octane level in the fuel.


  • Limit for Acceptable Operation

    Limit for Emission Compliance

    Acceptable Operating Range

    Operation on E20 Gasoline

    Operation on E10 Gasoline

    Operation on Neat Gasoline

    Lean Air:Fuel Ratio Rich


    E-20’s Impact on Current, Exhaust- Emission Compliant Small Engines

    • Exhaust temperatures up 100°F

    • Peak cylinder pressures higher

    • Combustion deposits

    • Cylinder head gasket burned & failed

    • Exhaust valve burned

    • Cylinder bore scored

      • 25 hours light duty emissions testing

      • Lost cylinder compression

      • Lost 20% power


    E-20 Implications on Engine Durability

    Cylinder head gasket burned

    Lost seal

    Exhaust leak out


    E-20 Implications on Engine Durability

    Cylinder Bore scoring

    Deposits


    Engine Durability Implications with E-20

    1

    6

    8

    2

    3

    4

    5

    7

    1

    Head bolts discolored due to heat and carbon build up from exhaust gas blowing past bolt.


    EPA Waiver Criteria

    • Manufacturer must demonstrate that E20:

      • Will not cause or contribute to the failure of any vehicle to comply with emission standards over it useful life.

      • Testing must be completed to access the impact on

        • Tailpipe emissions

        • Evaporative emissions

        • Materials compatibility

        • Drivability

      • Registration of a fuel additive also requires testing to characterize compounds for potential health effects


    NMMA Strategy

    • Continue to work with the industry coalition;

    • Collect data specific to the impact of E-20 on recreational marine engines and fuel systems;

    • Build a technical case focusing on the waiver criteria against incremental increases in ethanol content;

    • With solid documentation present this information to the Minnesota representatives, both state and federal;

    • Post ethanol information on the NMMA website and make this information available to the public and press;

    • http://www.nmma.org/government/environmental/

    • Develop an NMMA Position that considers the potential national trend towards increase use of reformulated fuels.


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