Evolution Evo-System Instruction Manual

®

®

EVO-SYSTEM

ENGINE

MAINTENANCE

RUBBER COUPLING

INSPECTION AND REPLACEMENT

instructions

tri-lobed sprocket

rubber coupling

simple to replace

*

Generic images shown to illustrate the Evo-System’

s functionality.

Engine and outputs may vary according to market destination.

Note: This procedure is a two person
operation and must only be attempted
with the engine completely COLD!

The rubber coupling is part of the
transmission system of the Evo-engine. It is
a ‘wearing part’ and should be checked every
250 hours for serviceability. The following
instructions are intended for owner/operators
who are familiar with and have competence/
experience in the maintenance procedures
required for small capacity 4 stroke petrol
engines. If you do not feel completely
confident with the following instructions,
please contact our helpline for extra advice.

• Note the position of the recoil starting

handle for future re-installation. Remove
the recoil starting system by undoing and
removing the 3 x ø8 mm (Evolution
Engine) or 3 x ø10 mm (Mitsubishi Engine)
securing bolts and washers. Store these
and the recoil system safely.

Removing the recoil starting system will give
access to the ø21 mm nut on the end of the
engine crankshaft.

This nut can be held with a spark plug
spanner to prevent the crankshaft from
rotating.

• Hold the crankshaft securely to prevent it

from rotating.

• Loosen the ø19 mm AF bolt on the

opposite end of the crankshaft by using a

19mm socket with a tommy bar attached.

The socket can be ‘pushed’ into the
machine to gain extra security for the
socket on the bolt head.

The ø19 mm bolt is tightened to a

reasonably high torque and may need to be
‘shocked loose’ by subjecting the socket
tommy bar to a sharp blow (use a rubber
mallet).

2

http://www.evolutionpowertools.co.uk/evosystem

®

Recoil Handle

ø21 mm

®