Dolmar MS-250.4 - Troubleshooting Engine Issues; Engine Starting Problems; Engine Stopping and Speed Issues; Cutter Blade and Vibration Problems

21
*1 Perform initial replacement after 20h operation.
*2 For the 200 operating hour inspection, request Authorized Service Agent or a machine shop.
*3 After emptying the fuel tank, continue to run the engine and drain fuel in the carburetor.
Operating time
Item
Before
operation
After
lubrication
Daily
(10h)
30h 50h 200h
Shutdown
/rest
Corres-po
nding P
Inspect/clean ○ 11
Engine oil
Replace ○
*1
17
Tightening parts
(bolt, nut)
Inspect ○ 19
Clean/inspect ○ ―
Fuel tank
Drain fuel ○
*3
20
Throttle lever Check function ○ 13
Stop switch Check function ○ 13
Cutting blade Inspect ○ ○ 9
Low-speed rotation Inspect/adjust ○ 15
Air cleaner Clean ○ 18
Ignition plug Inspect ○ 19
Cooling air duct Clean/inspect ○ 19
Inspect ○ 19
Fuel pipe
Replace ◎
*2
―
Gear-case grease Refill
○
19
Fuel filter Clean/replace ○ 19
Clearance between air intake
valve and air discharge valve
Adjust ◎
*2
―
Engine overhaul ◎
*2
―
Carburetor Drain fuel ○
*3
20