5
To Stop
Normal shutdown
1. With the throttle lever closed from ON to OFF, run the engine for 3-5 minutes at low speed, and after
temperature is lowered, turn the switch to the “OFF” position.
2. Close the fuel shut-off valve by moving the fuel cock lever to the CLOSED position.
Emergency shutdown
Move the throttle lever quickly to the IDLE position, and turn the engine ON/OFF switch to the OFF
position.
Maintenance and Storage:
Periodic Maintenance Schedule
Daily
Before
Starting
After
First
5
hours
Every
Week
or
25 hours
Every
month
or
100 hours
Every
3 months
or
300 hours
Check fuel level.
●
Check oil level of machine.
●
Check fuel line and fittings for cracks or
leaks.
●
Tighten ramming shoe hardware.
●
●
Check and tighten engine cylinder screws.
●
●
Check and tighten external hardware.
●
●
Clean engine cooling fins.
●
Clean and check spark plug gap.
●
Replace spark plug.
●
Clean recoil starter.
●
Change ramming system oil. *
●
Clean engine muffler and exhaust port.
●
* Change ramming system oil after first 50 hours of operation.
Note: If engine performance is poor, check, clean, and replace air filter elements as needed.
Air Cleaner Cleaning for MR68H/MR75R (6 to 12 months Service):
Remove element from pre-cleaner at the top of crank case and clean it with cleaning oil (kerosene). Take of
‘Bolt, Cover’ of the crankcase upper part and take ‘Element’ off ‘AIR CLEANER’. Wet the bottom element
(gray) with 7-9cc and let upper element (yellow) be familiar with oil.
MR75R is the top element (yellow) with 2-5cc and bottom element (gray) with 13-15cc of engine oil SAE
10W-30 squeeze out the oil before installing them. Air cleaner of the engine side will hardly be
contaminated. If it is, however, after cleaning the element with kerosene, dip it in mixed oil consisting of 3
parts of gasoline and 1 part of engine oil. Then tightly squeeze outer primary element (sponge) and shake
off well the inner secondary element before installing them.
