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1. INTRODUCTION
Changing spark plugs correctly is extremely important, because otherwise ignition failure would take place,
affecting the performance of the engine or influencing the engine overhaul routine.
This document thus describes the basic procedure for changing spark plugs in conformity with
Kohler Siemens Business recommendations.
2. PRELIMINARY CHECKS
Before installing a new set of spark plugs in an engine, check the following points:
The spark plugs you are going to install are those specified by Kohler for
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the application concerned.
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You have the appropriate tools, i.e. socket wrench, torque wrench.
Handling of the parts was correct, no hitting or fall having occurred, which would have damaged the new
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elements.
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Each plug has been visually checked and found free from imperfections and mill defects which could
impair its proper operation. You can measure and adjust only some of the Kohler -referenced spark
plugs. In particular, the spark gap will be measured against the values tabulated below, using
thickness gauges (in the event of one-electrode spark plugs) and a special gap setting tool ref.
(in the event of four-electrode spark plugs).
ATTENTION
It may happen that the actual spark gap differs from the specified value even on new spark plugs. In this
event, adjust the gap with the special tool by separating or approaching the electrodes. Refer to
Kohler for spark gap for each spark plug.
3. CHANGING THE SPARK PLUGS
Having completed the above preliminary checks, change the spark plugs of the engine according to the following
steps:
1. Stop the engine, then disconnect all the wires of the secondary, taking care to soil the Teflon section of the
same as little as possible and clean this section with an absorbent degreasing paper if stained with oil or any
other substance. Check for electric continuity of any wire suspected of being damaged. If any of the wires is so
damaged or soiled that it would not operate correctly, change it for a new one.
PRODUCT INFORMATION
IO-G-M-33-001e
CONVENTIONAL SPARK PLUG CHANGING AND
MAINTENANCE INSTRUCTIONS
5.2.23
INDEX
DATE
C
June 2013
O&M_2.002211.810_A_10_2016
Dep.2
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