Rotax 912 i series Service Manual

BRP-Rotax
MAINTENANCE MANUAL LINE
Spark plug face Spark plug face reveals the following about the operating condition of the engine:
Spark plug face Information
light tan- coloured
plug and calibration of the engine are correct
velvet black
Possibly indicates one or more of the following:
• mixture too rich
• insufficient air intake (clogged air filter)
• engine operating temperature too low
oily, glossy coating
Possibly indicates one or more of the following:
• damaged valve stem seal
• misfiring
• too much oil in combustion chamber
• worn cylinder and piston rings
white with formation
of melt beads
Possibly indicates one or more of the following:
• mixture too lean
• leaking valves
Effectivity: 912 i Series
Edition 2/Rev. 0
12–20–00
Page 49
September 01/2018

Rotax 912 i series Specifications

General

Number of Cylinders	4
Max Power	100 hp (73.5 kW)
Max Power Output RPM	5800 rpm
Ignition System	Dual electronic ignition
Oil System	Dry sump, forced lubrication with separate oil tank
Reduction Gear Ratio	2.43:1
TBO	2000 hours
Engine Type	4-stroke, horizontally opposed
Displacement	1352 cm³
Bore x Stroke	84 mm x 61 mm
Max Torque	128 Nm
Fuel Type	Avgas 100LL or unleaded automotive gasoline
Fuel System	Electronic fuel injection
Cooling System	Liquid/air-cooled