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PROBLEM
Engine fails to start
Engine hard to start
Engine lacks power
Detergent fails to mix with spray
Pump doesn't produce pressure
Machine doesn't reach high
pressure
If problem persists after trying the above solutions, contact customer service or a qualified service center for assistance.
NOTICE:
As the equipment owner, you are responsible for the performance of the required maintenance listed in the Maintenance
section. It is recommended that you retain all receipts covering maintenance on your equipment. Neglecting or failing
to perform the required maintenance may increase emissions, decrease fuel efficiency, degrade performance, cause
irreversible engine damage and/or void your warranty.
TROUBLESHOOTING
POSSIBLE CAUSE
No fuel in tank
Water pressure in hose
Spark plug shorted or fouled
Spark plug is broken (cracked porcelain
or electrodes broken)
Ignition lead wire shorted, broken, or
disconnected from spark plug
Ignition inoperative
Choke in wrong position
Engine is flooded
Water in gasoline
Weak spark at spark plug
Dirty air filter
High pressure nozzle attached
Soap tank is empty
Low pressure nozzle installed
Inadequate water supply
Trigger handle or spray wand leaks
Nozzle is clogged
Air in line
Hose is leaking
Kink in hose
Pump is faulty
Diameter of garden hose is too small
Water supply is restricted
Not enough inlet water
Wrong nozzle is attached
Page 18 — English
SOLUTION
Fill tank
Squeeze trigger to relieve water pressure.
Replace spark plug
Replace spark plug
Replace lead wire or attach to spark plug
Contact a qualfied service center
Move choke to START position to start a
cold engine. If engine is warm, choke should
be in RUN position
Move choke to RUN position and pull the
starter grip and rope repeatedly until the
engine starts
Drain entire system and refill with fresh fuel
Contact a qualfied service center
Clean or replace air filter
Use blue soap nozzle to apply detergent
Add detergent to soap tank
Replace with high pressure nozzle
Provide adequate water flow
Check connections and / or replace trigger
handle or spray wand
Clean nozzle
Squeeze trigger on trigger handle to remove
air from line
Replace hose
Eliminate kinks in hose
Contact a qualfied service center
Replace with 3/4 in. garden hose
Check garden hose for kinks, leaks, and
blockages
Open water source full force
Attach the high pressure nozzle
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Need help?
Do you have a question about the BM80544 and is the answer not in the manual?
Questions and answers
Starts and diesnew carb,
Possible reasons the Black Max BM80544 starts and then dies after installing a new carburetor include:
1. Incorrect Carburetor Installation – Ensure the carburetor is properly installed and all connections, including fuel lines and gaskets, are secure.
2. Clogged Jets or Passages – If the new carburetor has debris or was not cleaned before installation, it may block fuel flow.
3. Improper Fuel Mixture – The carburetor may need adjustment to ensure the correct air-fuel ratio.
4. Blocked Fuel Supply – Check if the fuel tank, fuel filter, or fuel line is clogged, restricting fuel flow.
5. Choke Position – If the choke is left in the START position after the engine is warm, it may cause stalling. Move it to the RUN position.
6. Vacuum Leak – Loose or damaged gaskets between the carburetor and engine can create air leaks, affecting performance.
7. Ignition or Spark Plug Issues – A fouled or shorted spark plug may cause the engine to die after starting.
Check these factors and make necessary adjustments to resolve the issue.
This answer is automatically generated
Does 3100psi.2.5mpg have a fuel filter?