Dolmar MS-250.4 Checking the Spark Plug, Supply of Grease to Gear Case, Cleaning of Fuel Filter

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 0.7-0.8mm (0.028”-0.032”). If the gap is too wide or too narrow, adjust it. If the spark plug is clogged with carton or fouled, clean it thoroubhly or replace it.

CAUTION : 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 2 or equivalent) to the gear case through the grease hole every 30 hours. (Genuine DOLMAR grease may be purchased from your DOLMAR dealer.)

CLEANING OF FUEL FILTER

WARNING: INFLAMMABLES STRICTLY PROHIBITED

Interval of Cleaning and Inspection: Monthly (every 50 operating hours)

Suction head in the fuel tank

–The fuel filler (1) of the suction head is used to filler the fuel required by the carburetor.

–A periodical visual inspection of the fuel 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 fuel filter at least quarterly to ensure satisfactory fuel supply to the carburetor.

REPLACEMENT OF FUEL PIPE

CAUTION: INFLAMMABLES STRICTLY PROHIBITED

Interval of Cleaning and Inspection: Daily (every 10 operating hours)

Replacement: Annually (every 200 operating hours)

Replace the fuel pipe every year, regardless of operating frequency. Fuel leakage may lead to fire.

If any leakage is detected during inspection, replace the oil pipe immediately.

0.7mm-0.8mm (0.028”-0.032”)

Gear case

Grease hole

Fuel pipe

House clamp

Fuel filter(1)

Fuel pipe

INSPECTION OF BOLTS, NUTS AND SCREWS

–Retighten loose bolts, nuts, etc.

–Check for fuel and oil leakage.

–Replace damaged parts with new ones for safety operation.

CLEANING OF PARTS

–Keep the engine always clean.

–Keep the cylinder fins free of dust or dirt. Dust or dirt adhering to the fins will cause seizure.

REPLACEMENT OF GASKETS AND PACKINGS

In reassembling after the engine is dismounted, be sure to replace the gaskets and packings with new ones.

Any maintenance of adjustment work that is not included and described in this manual is only to be performed by Authorized Service Agents.

19