Rotax 912-UL User Manual

d03936
page 12 - 2
Jan. 01/2007
Effectivity: 912 Serie
OM Edition 1 / Rev. 0
BRP-Rotax
POSSIBLE CAUSE:
a - overheating of engine
Engine keeps running with ignition off
Oil level is increasing
POSSIBLE CAUSE:
a - oil too cold during engine operation
Knocking under load
POSSIBLE CAUSE:
a - Octane rating of fuel too low
Engine hard to start at low temperature
POSSIBLE CAUSE:
a - starting speed too low
b - low charge battery
c - high oil pressure
d - oil pressure too low after cold start
REMEDY:
let engine cool down at idling at
approx. 2000 r.p.m.
REMEDY:
cover oil cooler surface, maintain
the oil temperature prescribed.
REMEDY:
use fuel with higher octane rating.
REMEDY:
preheat engine.
fit fully charged battery.
at cold start a pressure reading of
up to around 7 bar (102 psi) does
not indicate a malfunction.
too much resistance in the oil suc-
tion tube at low temperatures. Stop
engine and preheat oil.
At oil pressure reading too low than
1 bar oils with lower viscosity are
to be used.
See SI-912-016, current issue.
◆ NOTE: Oil pressure must in the idle operation with an
oil temperature of min. 50 °C (120°F) to be
measured.

Rotax 912-UL Specifications

General

Displacement	1211 cc
Bore x Stroke	79.5 mm x 61 mm
Compression Ratio	9.0:1
TBO (Time Between Overhaul)	2000 hours
Engine Type	4-cylinder, 4-stroke
Power Output	80 hp
Cooling System	Liquid/air-cooled
Fuel Type	Avgas 100LL or unleaded automotive gasoline
Oil Capacity	3 liters
Fuel System	2 carburetors
Oil System	Dry sump forced lubrication with separate oil tank
Reduction Gear Ratio	2.43:1
Max Continuous Power	75 hp (56 kW)