Rotax 915 i A SERIES Maintenance Manual

BRP-Rotax
MAINTENANCE MANUAL
REPLACEMENT OF SPARK PLUGS
General note
ATTENTION
Use of incorrect spark plugs can result in ignition problems and pre-ignition and
consequent engine damage.
See Chapter 05–50–00 section Returning engine to service after submerging in water
Because of the differing thermal load, particular spark plugs have been specified for each
engine type.
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
NNOOTTEE
Operation with leaded fuels (e.g. AVGAS 100LL) can result in increased wear of
the spark plugs. Reduce renewal intervals accordingly.
Spark plugs See the latest illustrated parts catalog for the corresponding engine type.
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
NNOOTTEE
Inspect the electrode gap also on use of new spark plugs.
Electrode gap
New Wear limit
0.8 - 0.9 mm (0.031 - 0.035 in) 1.1 mm (0.043 in)
Spark plug face Spark plug face reveals the following about the operating condition of the engine:
Spark plug face Information
light coloured to
brown
plug and calibration of the engine are correct
velvet black
Possibly indicates one or more of the following:
• mixture to rich
• insufficient air intake (clogged air filter)
• engine operating temperature too low
Effectivity: 915 i A Series
Edition 0/Rev. 0
12–20–00
Page 41
December 01 2017

Rotax 915 i A SERIES Specifications

General

Brand	Rotax
Model	915 i A SERIES
Category	Engine
Language	English