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N14 Base Engine Troubleshooting and Repair Manual – 006-012   Fuel Drain Line Restriction

Table of Contents

Measure

Measure

 TOC

Inspect the drain lines and make sure the lines do

not
have any loops and are

not crimped.

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Remove the fuel drain line and install the Mercury Manometer, Part No.

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Operate the engine at rated speed and no load.

  
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Observe the reading on the manometer. Hold the manometer at the same level as the connection.

Fuel Drain Line Restriction
mm-hg in-hg
89 NOM 3.5
 
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If the restriction is above the maximum specifications, remove the fuel tank fill cap and check again.

  
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If the restriction is below the specifications when the cap is removed, replace the tank vents.

If the restriction is still above the specifications, inspect the drain lines for restrictions.

  
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Last Modified:  12-May-2003
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