Tightening Torques for Rotax Aircraft Engines

Here are a few tightening torques you might need when performing routine maintenance on your Rotax Aircraft Engine. These informations and much more can be found in our Engine Maintenance Logs.

More more torque specifications, please refer to the relevant maintenance manuals and illustrated parts catalog.

	Torque			Agent	Notes
Rotax 2-Stroke Aircraft Engines	Nm	In.lb	Ft.lb
M8 Cylinder Head Nuts (air cooled engines)	22	195	16	-	Undo and retighten one at a time following the specified sequence:
M8 Cowling Bolts (air cooled engines)	14	125	10	Loctite 242/243
M8 Exhaust Manifold Bolts (447 only)	25	221	18	Anti-Seize	Tighten progressively in a crossing pattern
M6 Exhaust Manifold Bolts (618 only)	10	90	8
M8 Exhaust Manifold Bolts (all other engines)	22	195	16
M8 Intake Manifold Bolts (air cooled engines)	24	210	18	Loctite 242/243
14mm Spark Plugs	27	238	20	Anti-Seize	On a cold engine
M16 Fan Nut (air cooled engines)	60	530	44	Loctite 221/222	Use fan holding tool. Tighten slightly then rotate fan. Repeat until fully tightened.
M18 Gearbox Drain Cap	24	210	18	-	Secure with Safety Wire
M10 Engine Mounting Studs	38	335	28	Loctite 221/222
Rotax 4-Stroke Aircraft Engines
Oil Tank Drain Screw	25	220	18	-	Replace gasket ring and secure with Safety Wire
Oil Filter	Hand tighten			-	Oil gasket, retighten after test run
Magnetic plug	25	220	18	-	Secure with Safety Wire
Water Pump Drain Screw	10	90	8	-	Replace gasket ring
Carburetor Socket Clamp	Tighten to a distance of 7mm/0.276"
Carburetor Socket Screws	15	135	11	Loctite 221/222
Spark Plugs 12mm/16mm	20	180	15	Anti-Seize	On a cold engine

Please, do not use red Loctite (such as type 262)! It is a permanent adhesive! It is sometimes very difficult to remove parts secured with it without damage.