Replacing/Cleaning The Spark Arrestor Screen; Inspecting And Replacing The Spark Plug; Checking The Muffler Bolts - Dolmar MS-3310, MS-4010, MS-4510 Owner's And Safety Manual

Replacing/cleaning the
spark arrestor screen
J
Weekly maintenance
Inspecting and replacing
the spark plug
CAUTION:
NEVER touch the spark plug or spark plug cap while the
engine is running (high voltage).
Never do maintenance work with the engine running!
A hot engine can cause severe burns. Wear protective
gloves!
19
K
The spark plug must be replaced if the insulator is damaged
or if the electrodes are severely eroded or dirty or oily.
- Pull the spark plug cap (K/18) off the plug. Use only the
combination wrench supplied with the brushcutter to
remove the spark plug.
Note: Replace only with CHAMPION RCJ-6Y, BOSCH WSR
6F or NGK BPMR 7A spark plugs!
Checking the muffler
bolts
Caution:
Do not tighten the muffler bolts while the engine is hot!
- Remove plug connector (K/18) and unscrew and remove
the filter cover (K/15).
- Loosen the four fixing bolts (K/19) of the cover and remove
it.
- Check the muffler bolts (M/20) for tightness using the Allen
key. If loose, tighten manually. Do not over-tighten.
STOP
5
STOP
18
15
STOP
The spark arrestor screen should be checked and cleaned
regularly.
- Remove the filter cover (see "Checking the muffler bolts").
- Loosen the 2 screws (J/5) and remove the spark arrestor
screen.
- Clean the spark arrestor screen with a soft brush.
NOTE: Do not use sharp or pointed objects for screen clean-
ing. Damaged or misformed screen wires may result.
IMPORTANT: If the spark arrestor screen is damaged
replace it immediately!
- Reassembly the spark arrestor screen and tighten the
screws.
L
Electrode gap
The electrode gap must be .020" - .030" (0.5 - 0.8 mm).
Checking the ignition spark
- Remove the spark plug. With the spark plug cable on, hold
the plug against the cylinder (but not near the spark plug
hole!) using insulated pliers.
- Turn the on/off switch to "I" (on).
- Pull the starter cable hard.
A spark should be visible at the electrode gap.
M
.020" - .030"
(0.5 - 0.8 mm)
20
21