WATERAX MARK-3 Owner's Manual
03/2016 – Page 8 of 52
OPERATING MARK-3 SERIES PUMPS
Pre-Operation Checklist
Before using your pump, follow this verification procedure:
1. Visually inspect product. When you first receive your MARK-3 pump, inspect the
product and check for any damage. Notify the supplier if any damage is found.
2. Check that all suction and discharge hoses are structurally sound and do not leak.
3. Inspect all safety features and verify that they are in good order before using the pump.
4. Each time you plan to use the pump, check for damage that may have occurred during
previous use. Notify your manager that the equipment requires repair. Remember that
damaged equipment can expose you to safety hazards.
Fuel Supply
Fuel mixture
The MARK-3 is powered by a 185cc two-cycle (two-stroke) engine.
For lubrication, the engine requires a premixed fuel mixture of
gasoline and oil.
GASOLINE: 87 octane unleaded automotive gasoline
(maximum 10% ethanol)
OIL: High quality two-cycle mixing oil with API-TC,
JASO-FD and ISO-L-EGD certification (e.g.,
Amsoil Saber
®
Professional Synthetic)
FUEL MIX RATIO: 50:1 (gas to oil)
Not enough emphasis can be placed on the use of correct gasoline and oil mixture. Using
less than the recommended portion of oil will cause overheating and possible engine
damage. Using more than the recommended proportion of oil will cause spark plug
fouling, erratic carburetion, excessive exhaust smoke and rapid carbon deposits.
This fuel mixture is compatible with both Nikasil and cast iron sleeve cylinder engines. For
engine break-in fuel mixture, refer to the Service section.
Gasoline, octane and ethanol
WATERAX recommends using high quality automotive grade gasoline with a minimum
octane rating of 87 (AKI) and a maximum ethanol concentration of 10% in its fuel mix for
the MARK-3.
It is important to note that gasoline has a shelf life. Depending on storage conditions,
gasoline can go stale in a matter of weeks. Gasoline will deteriorate in three ways:
1. The more volatile components of the gasoline evaporate, leaving behind a heavier
gasoline which can lead to inferior engine performance and a more difficult engine to
start.
2. Certain hydrocarbons in the gas react with oxygen (oxidation) producing new and
harmful compounds. The stale gasoline will smell sour, its color will go dark, and
gummy particles can appear in the gas. This can lead to poor engine performance and
reliability issues with the carburetor.
3. Water contamination, which is normally caused by condensation, can be catastrophic
to the engine. Gasoline containing ethanol is more susceptible to that problem. Ethanol
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