HYWAY TITANIKEL Stihl MS391 / MS311 cylinder kit 49 mm Pop-Up - 1140 020 1204

This Stihl MS391 cylinder kit consists of a 49 mm HYWAY TITANIKEL cylinder and a matching Pop-Up piston.

It is intended for engines whose intake flange is fastened with three bolts.

OEM reference number:

1140 020 1204

The kit is also used to convert compatible MS311 engines to a 49 mm cylinder bore.

The cylinder's working surface is coated with HYWAY TITANIKEL coating.

The Pop-Up piston features a raised crown designed to reduce combustion chamber volume and increase compression.

Compatibility

Stihl MS391:

Compatible versions with a three-bolt intake flange

Stihl MS311:

Compatible three-bolt versions
Used when converting to a 49 mm cylinder bore
Important

This kit is not a direct replacement for the earlier cylinder with a four-bolt intake flange.

The four-bolt variant is associated with:

1140 020 1202

Before ordering, check the mounting points of the old cylinder.

What's included in the kit
49 mm TITANIKEL cylinder
Pop-Up piston
Piston rings
Piston pin
Retaining circlips
Before installation

Check:

the intake assembly
the cylinder mounting
compatibility of adjacent engine parts
top-of-piston clearances
condition of reused parts

Also determine the cause of failure of the previous cylinder.

More repair components can be found in the chainsaw spare parts category.