Replacement Of Spark Plugs; Remove The Spark Plugs; Inspection Of Spark Plugs - BRP Rotax 915 i A Series Maintenance Manual

REPLACEMENT OF SPARK PLUGS

General note
Use of incorrect spark plugs can result in ignition problems and pre-ignition and
See
In numerous tests the best possible heat range has been determined to make sure that
the spark plug will burn off deposits but will not overheat.
Renewal intervals
NOTE
Operation with leaded fuels (e.g. AVGAS 100LL) can result in increased wear of
the spark plugs. Reduce renewal intervals accordingly.
Spark plugs

REMOVE THE SPARK PLUGS

Remove Remove the spark plugs and store them according to cylinder and position.

INSPECTION OF SPARK PLUGS

Visual check Inspect all spark plugs for mechanical damage.
Electrode gap
NOTE
Inspect the electrode gap also on new spark plugs before installation.
0.8 - 0.9 mm (0.031 - 0.035 in)
Spark plug face Spark plug face reveals the following about the operating condition of the engine:
light tan- coloured
velvet black
Effectivity: 915 i A Series
Rev. 1
BRP-Rotax
MAINTENANCE MANUAL LINE
Chapter 05–50–00 section Returning engine to service after submerging in
See Illustrated parts catalog for the engine type 915 i A Series.
New
Spark plug face
plug and calibration of the engine are correct
Possibly indicates one or more of the following:
• mixture too rich
• insufficient air intake (clogged air filter)
• engine operating temperature too low
ATTENTION
consequent engine damage.
Electrode gap
1.1 mm (0.043 in)
Information
water.
Wear limit
12–20–00
Page 41
June 01 2019