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DARLEY HEF Operating Instructions Manual page 22

Dolphin float pump

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Pump does not make advertised performance anymore.
 The mechanical seal may be damaged and this is reducing the flow and/or
pressure of the pump unit.
 The seal rings may be damaged due to pumping dirty or salt water.
 The engine needs to be checked for problems.
 There is debris lodged in the suction inlet strainer or impeller vane.
 The pump is in an insufficient depth of water.
 The pump impeller is no longer sufficiently tightening to the engine shaft.
 The engine fuel filter may be dirty or clogged.
 The fuel may be bad and needs replacing.
The engine takes a lot of effort to turn over with the recoil starter rope.
 The pump mounting fasteners have loosened some, the pump assembly
shifted and now there is excessive side loading on the engine shaft by the
pump pilot bushing.
 Debris may be lodged in the pump, causing rubbing on the impeller.
The engine takes excessive recoil starter rope pulls to start.
 The engine spark plug needs to be replaced.
 The air filter is dirty.
 Fuel system may need priming by actuating the fuel primer.
 The fuel line needs to be clean or the fuel primer assembly needs to be
overhauled.
 Water got into the exhaust and therefore the engine block.
 Fuel filter may need replacing.
Then engine is much more smoky than before.
 Engine oil should be replaced.
 Air filter may need to be replaced because it got wet or dirty.
 See engine technician if you are still having problems.
Prepared by: RJG
Approved by: TED
Revised by: TED
Rev. A
Date: 03/04/10
Rev. Date: 30June2015
1200627.doc

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