Rotax 277, 277 Rotax engine manual disassembly instructions.

DISMOUNTING OF ENGINE1) Clean engine before dismounting.

2) Screw off exhaust socket.
Tool:hex. socket screw key 6 mm
Dismount cylinder cowl and fan cowl with rewind starter.
Tool: socket wrench 10/13 mm
Screw off carburetor socket
Tool: hex. socket screw key 6 mm
Fix crankshaft to top dead center through the impulse connection.
Tool: crankshaft fixation bolt 876 640
Unscrew starting pulley, 

Tool: socket wrench 10 mm
Fix puller ring on the magneto housing with 3 hex. screws
M8 x 25.
Tools: puller ring 876 655
hex socket screw key 5 mm
Unscrew crankshaft nut, mag. side
Tool: Socket wrench 27 mm with extension (or torque wrench)
Place protection mushroom on crankshaft and screw puller into puller ring, then pull off the magneto housing (see ill.)
Tools: Protection cap 876 557, puller ring 876 655 puller for magneto housing 876 065 fork wrench or socket wrench 22

Dismount ignition coil 
Tools: 
Socket wrench, screwdriver
Mark armature plate position to crankcase for re-assembly. Screw off armature plate, remove cable grommet and pull through wiring harness.
Tools: 
Hexagon socket screw key 4 mm screwdriver
Unscrew cylinder head nuts 
Tool: Socket wrench 13 mm
13) Take off cylinder head, cylinder head gasket, cylinder and cylinder base gasket.
14) Cover opening in crankcase with a clean cloth.
15) Remove piston pin circlips (see ill. no. 2)
Tool: 
Small screwdriver, shaped as shown on ill. no. 2.

Push piston pin out by hand.
Tool: 
Suitable punch for piston pin.
Attention:
When pushing out the piston pin, the piston must be firmly held by hand to prevent bending of the connecting rod (see ill. no. 3).