Honda UMK431 Manual Download Page 2

STARTING ENGINE 

Place machine on a level surface free of obstacles, and be sure the 
cutting head is not in contact with ground or any materials.

 

   
 

 

 

 
 
 
 

 
 

 

 

  

1. 

 ‘Engine switch’

 to 

‘on’

2. Squeeze 

‘throttle trigger’

 and press in 

‘idle-up knob’

. Release 

throttle whilst holding knob in, to set starting fast tick-over. 

3. Squeeze the plastic 

‘priming pump’ 

bowl until fuel is seen in 

transparent 

‘fuel return tube’

4. 

The choke

 is only needed if the engine is very cold (it normally 

starts on 2

nd

 / 3

rd

 pull without use of choke). The open choke 

(normal) position is down. 

5. 

Gently

 pull starter. The engine will normally start on the 2

nd

 or 

3

rd

 pull. 

6. 

DO NOT ALLOW

 starter grip to snap back as damage can 

result. Return it gently. 

7. As soon as engine running, touch the 

‘throttle trigger’

 to 

release 

‘fast idle-knob’

. The engine then runs at normal tick-

over and machine is ready for use.  

 
 
 
 
 
 
 
 
 
 

STOPPING ENGINE 

Slide 

‘engine switch’ 

up to 

off

 and machine will stop. 

 

REFUELLING- NEAT UNLEADED PETROL 

Do not smoke and only undertake in open air. 
Be very careful not to spill fuel over the engine whilst refuelling.

 

 

CRANKCASE OIL 

Check after every 10 hours use. 
The machine must be on a level surface for checking.

 

 
  
  

 

 

Total oil capacity 0.1L 

 

Grade 10W-40 or 20W-40 

 
 
SAFE OPERATION 

Adjust the carrying harness so that the quick release latch is 
positioned at your right hip. Hook the trimmer to the carrying harness. 
Adjust the harness so the cutting position is as shown below. 
Hold the trimmer firmly with both hands during operation so as to 
keep control. 
Keep cutting attachment below knee height at all times. 
Apply throttle and operate trimmer using your waist to swing in a level 
arc from 

right to left

Do not operate on a steep or slippery slope. 
If the cutter becomes entangled, switch engine off, release from 
harness & move to a clear area before removing trash from cutter. 
Wear gloves if blade is fitted. 

During use keep a continual lookout for people approaching 
your work area, and for any obstacles buried in undergrowth. 

  

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