O-Mac MF 2500, Manual

Page: 69 / 104

69
XIV. Chain maintenance table
Chain pitch Limiter tooth level (a) File diameter (d)
inches mm inches mm inches mm
3/8 Mini 9.32 0.018 0.45 5/32 4.0
0.325 8.25 0.026 0.65 3/16 4.8
3/8 9.32 0.026 0.65 13/64 5.2
0.404 10.26 0.031 0.80 7/32 5.6
This table gives the sharpening data for different types of chains, but this does not mean you can use
chains other than those approved and listed in the “Correct bar and chain combination table”.
XV. Problem identification
PROBLEM PROBABLE CAUSE REMEDY
1. The engine will
not start or will not
keep running
Incorrect starting procedure. Follow the instructions (par. 6.3)
Dirty spark plug or incorrect
distance between the electrodes
Check the spark plug (par. 8.5).
Air filter clogged Clean and/or replace the filter (par. 8.2).
Anti-freeze device
assembled incorrectly
Check the assembly
position (par. 6.1.4)
Carburetion problems
Contact the Authorised
Service Centre or dealer..
2. The engine starts
Air filter clogged Clean and/or replace the filter (par. 8.2).
Carburetion problems
Contact the Authorised
Service Sentre or dealer.
3. The engine runs
irregularly and lacks
power when revved
Dirty spark plug or incorrect
distance between the electrodes
Check the spark plug (par. 8.5).
Bar and chain problems
Check that the chain runs freely and
the bar guides are not deformed.
Carburetion problems
Contact the Authorised
Service Centre or dealer.
4. The engine makes
too much smoke
Incorrect composition
of the fuel mixture
Prepare the fuel mixture according
to the instructions (par. 7.2)
Carburetion problems
Contact the Authorised
Service Centre or dealer.
5. If the engine floods
The starter grip has been
driven repeatedly with
the choke engaged.
Remove the spark plug (par. 8.5) and
gently pull the starter rope hand grip
(Fig. 11.D) to eliminate any excess
fuel; then dry the spark plug electrodes
and remount it on the engine.