Makita BBX7600CA User Manual

Fault location 

Fault System 

Observation 

Cause 

Engine not starting or with 
difficulty 

Ignition system 

Ignition spark O.K. 

Fault in fuel supply or compression system, mechanical 
defect 

 

 

No ignition spark 

STOP-switch operated, wiring fault or short circuit, spark plug 
or connector defective, ignition module faulty 

 

Fuel supply 

Fuel tank filled 

Incorrect choke position, carburetor defective, fuel supply line 
bent or blocked, fuel dirty. 

 Compression 

No compression when 
pulled over 

Cylinder bottom gasket defective, crankshaft seals damaged, 
cylinder or piston rings defective or improper sealing of spark 
plug 

 

Mechanical fault 

Starter not engaging 

Broken starter spring, broken parts inside of the engine 

Warm start problems 

 

Tank filled ignition spark 
existing 

Carburetor contaminated, have it cleaned 

Engine starts but dies 

Fuel supply 

Tank filled 

Incorrect idling adjustment, carburetor contaminated 

 

 

 

Fuel tank vent defective, fuel supply line interrupted, cable or 
STOP-switch faulty 

Insufficient performance 

Several systems 
may simultaneously 
be affected 

Engine idling poor 

Air filter contaminated, carburetor contaminated, muffler 
clogged, exhaust duct in the cylinder clogged 

 

Operating time 

 
Item 

 

Before 

operation

After 

lubrication

Daily 

(10h) 

30h 50h 200h 

Shutdown/

rest 

Corres-po

nding P

Inspect/clean 

٤ 

 

 

 

 

 

 

10 

Engine oil 

Replace 

    

٤

*1

     15 

Tightening parts 
(bolt, nut) 

Inspect 

٤ 

 

 

 

 

 

 

17 

Clean/inspect 

٤ 

 

 

 

 

 

 

̆ 

Fuel tank 

Drain 

fuel        

٤

*3

 17 

Throttle lever 

Check function 

 

٤ 

 

 

 

 

 

̆ 

Stop switch 

Check function 

 

٤ 

 

 

 

 

 

12 

Low-speed rotation 

Inspect/adjust 

 

 

٤     13 

Air cleaner 

Clean 

 

 

٤     16 

Ignition plug 

Inspect 

 

 

٤     16 

Cooling air duct 

Clean/inspect 

 

 

٤     17 

Inspect  

 

٤     17 

Fuel pipe 

Replace 

     

٧

*2

 

 

̆ 

Fuel 

filter 

Clean/replace 

    

٤ 

 

 17 

Clearance between air intake 
valve and air discharge valve 

Adjust 

     

٧

*2

 

 

̆ 

Oil tube 

Inspect 

 

 

 

 

 

٧

*2

 

 

̆ 

Engine 

overhaul 

 

     

٧

*2

 

 

̆ 

Carburetor 

Drain 

fuel        

٤

*3

 17 

*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. 

 

 

18