To obtain optimal performance from your Moeller Marine fuel tank, it is important that you follow these installation guidelines closely.
- Follow all applicable ABYC, ISO, NMMA,
and USCG regulations and recommendations.
- The fuel tank must be fully supported in its installed position.
- The fuel tank should be installed securely. The installed fuel tank
shall not bounce, shift, or move as this will cause chaffing. The
fuel tank shall not be allowed to be scraped, cut, or punctured
because of a loose installation or manufacturing debris.
IMPORTANT: Neoprene padding should be added to any area
where the surface of the tank makes contact with a surface
that may cause chaffing. DO NOT COMPRESS NEOPRENE PADDING!
- Allow 3% expansion of the fuel tank in all directions. Hydrocarbon swell occurs when gasoline or diesel fuel soaks into
the fuel tank material. (Example: Initial size 40"L x 24"W x 18"H = Expanded size 41.2"L x 24.7"W x 18.5"H) Design the
fuel tank compartment to allow growth equally. Hold down brackets / braces must be installed to prevent damage to
the fuel tank even after hydrocarbon expansions occur.
- DO NOT remove dust caps until you are ready to install the fuel tank. Dust caps are provided to limit dirt,
dust, water or any other foreign substance from getting into the fuel tank.
- DO NOT install a natural colored fuel tank where it will be in direct sunlight in use as this
causes growth of bacteria in the fuel. A colored tank is required for direct sunlight applications.
- DO NOT deform the tank during installation. Methods of deforming the fuel tank also include: walking, standing, or applying excessive weight onto the fuel tank.
- DO NOT solid plumb fuel lines to the fuel tank use only flexible lines.
- DO NOT FOAM THE FUEL TANK IN PLACE!
- NEVER modify the fuel tank. Use only fittings which come with the tank, or fittings approved by Moeller Marine.
- DO NOT attempt to patch or repair holes or punctures in fuel tank.
- Fuel tank temperatures need to be stabilized to room temperature for 24 hours before testing or installation.
Improper installation may cause performance problems such as: Leaks, Loss of Capacity, Sender Inaccuracy, and Fuel Starvation.
Additional Suggestions: Mount the tank in an accessible area. Fuel tank fittings should be installed so they are readily accessible.
Installations that warrant removal of walls, floors, structure, or other systems may be warranted at a prorated rate.
IMPORTANT: Fuel system or propulsion damage resulting from the improper
installation of the fuel tank, will not be covered under the limited warranty.
Moeller Marine fuel tanks will perform satisfactorily when using a major brand of unleaded gasoline meeting the following specifications:
USA and Canada: having a posted pump Octane Rating of 87 (R+M)/2 minimum.
Premium gasoline [92 (R+M)/2 Octane] is also acceptable. DO NOT use leaded gasoline.
Outside USA and Canada: having a posted pump Octane Rating of 90 RON minimum. Premium gasoline (98 RON) is also acceptable. If unleaded gasoline is not available, use a major brand of leaded gasoline.
The fuel system components on your Moeller Marine fuel tank will withstand up to 10% alcohol content in the gasoline.
These are referred to as Reformulated (Oxygenated) Gasolines.
Using Reformulated (Oxygenated) Gasolines (USA Only)
This type of gasoline is required in certain areas of the USA. The 2 types of oxygenates used in these fuels is Alcohol (Ethanol) or
Ether (MTBE or ETBE). If Ethanol is the oxygenate used in the gasoline in your area, refer to Gasolines Containing Alcohol. These
Reformulated (Oxygenated) Gasolines, meeting the 10% limitation above, are acceptable for use in your Moeller Marine fuel tank.
Gasolines Containing Alcohol
If the gasoline in your area contains either methanol (methyl alcohol) or ethanol (ethyl alcohol), you should be aware of certain
adverse effects that can occur. These adverse effects are more severe with methanol. Increasing the percentage of alcohol in the fuel can also worsen these adverse effects.
Some of these adverse effects are caused because the alcohol in the gasoline can absorb moisture from the air, resulting in a separation of the water/alcohol from the gasoline in the fuel tank.
Be aware that gasolines containing alcohol may cause increased corrosion of metal parts, especially aluminum and brass.
Long periods of storage, common to boats, create unique problems. In cars alcohol-blend fuels are normally consumed before they can absorb enough moisture to cause trouble, but boats often sit idle long enough for phase separation to take place.
IMPORTANT: Use of improper gasoline or additives can damage your fuel system. Fuel system damage resulting from the use of improper gasoline or additives is considered misuse of the system, and damage caused thereby will not be covered under the limited warranty.
FIRE AND EXPLOSION HAZARD: Fuel leakage from any part of the fuel system can be a fire and explosion hazard which can cause serious bodily injury or death. Careful periodic inspection of entire fuel system is mandatory, particularly after storage. All fuel components should be
inspected for leakage, softening, hardening, swelling or corrosion.
Moeller Marine fuel tanks will perform satisfactorily when using a major brand of diesel fuel meeting the following specifications:
Grade 2-D diesel fuel is required, meeting ASTM Standards D975 (or fuel rated Diesel DIN 51601), and having a minimum cetane rating of 45.
|Diesel Fuel /Applicable Standard||Recommendation|
|JIS (Japanese Industrial Standard)|| No. 2|
|DIN (Deutsche Industrie Normen)|| DIN 51601|
|SAE (Society Of Automotive Engineers) Based on SAE J-313C|| No. 2-D|
|BS (British Standard) Based on BSEN 590-1197|| A-1|
Sulphur content of the above fuel is rated at 0.50% by weight, maximum (ASTM).
Limits may vary in countries outside of the United States.
On intermittent-use engines, high sulphur content diesel fuel will greatly increase:
Corrosion on metal parts.
Deterioration of elastomer and plastic parts.
Diesel Fuel In Cold Weather
Unaltered diesel fuels thicken and gel in cold temperatures unless treated. Virtually all diesel fuels are climatized to allow their
use in the particular region for that time of the year. If it becomes necessary to further treat diesel fuel, it is the owner / operator's
responsibility to add a commercial standard brand of anti-gel diesel fuel additive, following that product-s directions.
IMPORTANT: Use of improper or water contaminated diesel fuel can seriously damage your engine. Use of improper fuel is considered misuse of the engine, and damage caused thereby will not be covered by the warranty.
Under NO circumstances should gasoline, gasohol, or alcohol be mixed with diesel fuel. This mixture of gasoline, gasohol, or alcohol with diesel fuel is highly flammable and produces a significant risk to the user.
FIRE AND EXPLOSION HAZARD: Fuel leakage from any part of the fuel system can be a fire and explosion hazard which can cause serious bodily injury or death. Careful periodic inspection of entire fuel system is mandatory, particularly after storage. All fuel components should be inspected for leakage, softening, hardening, swelling or corrosion. Any sign of leakage or deterioration requires replacement before further engine operation.
Moeller Marine fuel tanks are capable of operation within an ambient temperature range from -40°F (-40° C) to 176°F (80°C).
IMPORTANT: Fuel tanks temperatures must be limited to 150°F (66° C) when not in operation. Processes that include dry heating
of the fuel tank beyond 150°F (66° C) should be discontinued immediately. Fuel tanks subjected to temperatures in excess of
150°F (66° C) when not in operation, could be considered as damaged, and may not be covered under the limited warranty.
Permeation is a natural phenomenon of gasoline in a cross-linked polyethylene fuel tank. Fuel (gasoline) vapors settle to the lowest point in the compartment, therefore, a means for removing the fumes is required.
See ABYC Standards Section H-2 for specifics.
A covered boat will not allow these fumes to escape, so build up of these fumes is inevitable. Caution should be taken when a boats fuel tank contains fuel and is covered for an extended period of time. A boat cover should never cover the fuel tanks exterior vent fitting(s).
Fuel vapors will migrate to any compartment open to the fuel tank. The smell of fuel vapors does not necessarily mean that there is a leak in the fuel tank, but a closer inspection should be performed.
Fuel vapors may be absorbed by other objects located in compartments where fuel vapor may migrate. Following the above precautions, a cross-linked polyethylene fuel tank will provide years of service.
Permeation is the result of gasoline fumes escaping from the fuel tank, not the loss of liquid fuel.
Several precautions need to be addressed when using a cross-linked polyethylene fuel tank:
Moeller Marine fuel tanks are tested in accordance to Title 33 CFR, Section 183.510. After installation, fuel tank and fuel system pressure
testing must be done in accordance with applicable laws. Fuel tank temperatures need to be stabilized to room temperature for 24 hours
before pressure testing.
IMPORTANT: Unrestrained pressure testing may cause damage or deformation to the fuel tank.
Fuel tank testing outside of the boat structure or prior to permanent installation requires the use of a fixture(s) to simulate the intended
installation or to restrain each tank surface within 1 inch the print specification. Failure to utilize control fixtures may cause unintended
surface deformation, causing leaks and permanent fuel tank damage. DO NOT exceed 3 psi for pressure testing.
Moeller Marine fuel tanks are manufactured from UV stable material. Fuel tanks may be stored outside, as long as steps are taken to prevent
damage to the fuel tank, any fittings or components exposed on the fuel tank, and to prevent intrusion of foreign substances. This
includes limiting exposure temperatures to -40°F (-40° C) to 150° F (66° C). Fuel tank temperatures need to be stabilized to room temperature for 24 hours before installation or pressure testing. If extended storage of the tanks is needed, Moeller Marine recommends that
you cover the fuel tanks. DO NOT ALLOW ICE OR SNOW BUILDUP.
First In First Out (FIFO) procedures should be followed as with any inventory.
The Association of Rotational Molders recognizes wall thickness tolerances of plus/minus 20% for rotational molded products. Other wall
thickness variations may be present due to design configuration.
Environmental and molding conditions result in variation of size and capacity of the fuel tank. Moeller recognizes size and capacity tolerances
of plus or minus 1-1/2 % of specified dimension or capacity. First article parts may exhibit additional shrinkage of the plastic, causing
larger than 1-1/2% variation. This is common to break-in of a new or revised mold.