Rotax 914 F User Manual

Reference Modification no.
- 0 -
Page
116
Date
1997 02 01
Main
914 F
01477
12.4.6) Exceeding of maximum admissible engine speed
Any exceeding of the max. admissible engine speed has to be entered by the
pilot into the logbook, stating duration and extent of overspeeding.
— Exceeding up to max. 1 minute up to 6200 rpm.: Check push rods for
straightness. See Chapter 14.8).
— Exceeding more than 1 minute:
Complete check and/or repair of engine is necessary. See Overhaul
Manual.
— Exceeding 6200 rpm.:
Complete check and/or repair of engine is necessary. See Overhaul
Manual.
12.4.7) Exceeding of cylinder head temperature
See Pic. 60.
Any exceeding of the max. cylinder head temperature has to be entered by
the pilot into the logbook, stating duration and extent of excess-temperature
condition.
Find reason for overheating.
At short term exceeding of the cylinder head temperature of up to 150 °C
(300°F) localize the cause and inspect the complete cooling system for
damage. Verify that pistons are not damaged by knocking combustion.
If a cylinder head temperature above 150° C (300° F) is noticed longer than
30 minutes, a leakage test by the difference pressure method (see Chapter
12.3.17) is necessary. Also a hardness test of the cylinder head material in
the area Q of the bearing support is required. Minimum hardness 85 HB
(Brinell hardness).
■ ATTENTION: Do not damage the sealing face W for O-ring!
Inspect complete installation of cooling system for damage, renew all coolant
hoses and conduct operational check of the cooling system. See Chapter
13.3).
◆ NOTE: A rise in cylinder head temperature above 135° C (275° F)
is a clear signal for a shortcoming in the cooling system:
— insufficient coolant, badly vented system
— radiator contaminated
— malfunction of water pump.
See details in chapter 12.3.13) and 13.3) cooling system.
Pic. 60
1
2
00187

Rotax 914 F Specifications

General

Brand	Rotax
Model	914 F
Category	Engine
Language	English