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Rotax 912 Series - Service Manual

Rotax 912 Series
456 pages
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MAINTENANCE MANUAL
(HEAVY MAINTENANCE)
FOR ROTAX® ENGINE TYPES
part no.: 899603
ROTAX® 912 AND 914 SERIES

picture 914 UL 3 DCDI with options
picture
912 ULS 3 DCDI with options

Table of Contents

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Rotax 912 Series Specifications

General IconGeneral
Redline5800 rpm
TBO2000 hours
Displacement1211 cc
Bore79.5 mm
Stroke61 mm
Power Output80 hp (59.6 kW)
Compression Ratio9.0:1
Fuel TypeAvgas 100LL
Ignition SystemDual electronic ignition
Fuel SystemFuel Injected
Oil SystemDry sump
Engine Type4-cylinder, horizontally opposed, 4-stroke

Summary

SECTION 00 INTRODUCTION

7) Safety notice

Outlines important symbols and warnings for safe operation and understanding of the manual.

10) Maintenance

Covers general maintenance procedures, troubleshooting, tightening torques, and consumable materials.

SECTION 71 POWER PLANT

SECTION 72 ENGINE

3.10) Cylinder head - removal

Provides step-by-step instructions for removing the cylinder head assembly.

3.13.1) Checking pistons

Details how to inspect and measure pistons, including ring grooves and clearance.

SECTION 74 IGNITION SYSTEM

2.1.1) Ignition

Details the breakerless dual ignition system (DCDI) and ignition timing.

SECTION 75 COOLING SYSTEM

3.1) Water pump removal and inspection

Provides instructions for removing and inspecting the water pump.

SECTION 76 ENGINE CONTROL

2.1) Turbocharger control (only on 914 Series)

Explains the turbocharger control system, including boost pressure regulation.

2.1.1) Control of boost pressure in the airbox

Details how boost pressure in the airbox is controlled via throttle valve and wastegate.

SECTION 78 EXHAUST SYSTEM AND TURBOCHARGER

3.3.3 Turbocharger

Covers visual inspection of the turbocharger unit, including wastegate lever.

SECTION 79 LUBRICATION SYSTEM

SECTION 80 ELECTRIC STARTER

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