Dolmar MS-20U Manuel D'instructions Original page 18

– After cleaning, attach the element.
– Insert the claw at the case upper part into the hole at the upper part of the air
cleaner cover. Then, attach the air cleaner cover by pushing it, and tighten
the screw (2).
NOTE: If there is excessive dust or dirt adhering to the air cleaner, clean it
every day. A clogged air cleaner may make it difficult or impossible to
start the engine or increase the engine rotational speed.
Checking the spark plug
– Only use the supplied universal wrench to remove or to install the spark plug.
– The gap between the two electrodes of the spark plug should be 0.6 - 0.7mm
(0.024" - 0.028"). If the gap is too wide or too narrow, adjust it. If the spark
plug is clogged with carbon or fouled, clean it thoroughly or replace it.
COUTION: Never touch the spark plug connector while the engine is running
(danger of high voltage electric shock).
Supply of grease to gear case
– Supply grease (Shell Alvania 3 or equivalent) to the gear case through the
grease hole every 30 hours. (Genuine DOLMAR grease may be purchased
from your DOLMAR dealer.)
Suction head in the fuel tank
– The felt filler (1) of the suction head is used to filler the fuel required by the
carburetor.
– A periodical visual inspection of the felt filter is to be conducted. For that
purpose open the tank cap, use a wire hook and pull out the suction head
through the tank opening. Filters found to have hardened, been polluted or
clogged up are to be replaced.
– Insufficient fuel supply can result in the admissible maximum speed being
exceeded. It is therefore important to replace the felt filter at least quarterly
to ensure satisfactory fuel supply to the carburetor.
Cleaning of muffler exhaust port
– Check of muffler exhaust port (2) regularly.
– If it is clogged by carbon deposits, carefully scratch the deposits out with a
suitable tool.
Any maintenance of adjustment work that is not included and described in this manual is only to be performed by Authorized Service Agents.
18
Gear case
Grease hole
(1)
(2)