Manual for HRB475 - Troubleshooting and error codes + PDF Download

Manual for HRB475 - Troubleshooting and error codes + PDF Download

Brand: HONDA

Category: Lawn Mower

Manual Type:

Language:

Uploaded: April 8, 2025, 1:51 p.m.

Manual Publish Date: 1994-12

Warranty Summary

Refer to the separate guarantee policy document provided by your dealer for warranty information.
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Operation Summary:

  • Starting the Engine:
    • Open the fuel cock.
    • Set throttle lever to 'CHOKE' for cold engine or 'FAST' for warm engine.
    • Turn the switch key to 'START'.
    • After engine starts, return key to 'ON' position.
  • Mowing:
    • Start engine and allow warm-up.
    • Select desired forward speed (if applicable).
    • Engage blade by pressing yellow button and pushing blade control lever forward.
    • Walk at a steady pace, avoiding slopes over 20°.
  • Stopping the Engine:
    • Move throttle control to 'SLOW' position.
    • Turn switch key to 'OFF'.
    • Close the fuel cock.

Troubleshooting and error codes

Problem Probable cause Page
Engine does not start 1. No gas.
2. Throttle lever is in “SLOW" position.
3. The ignition key is on “STOP” position.
4. Spark plug cord incorrectly attached or disconnected.
5. Spark plug defective or incorrect gap.
6. Engine flooded.
7. The fuse is blown.		 19
31
31
51
51
37
69
The starter won't turn 1. The battery is discharged.
2. The battery is disconnected.
3. The fuse is blown.		 69
69
69
Starting difficult or loss of power 1. Impurities in gas tank.
2. Air cleaner dirty.
3. Water in gas tank and in carburetor.
4. Gas tank filler cap vent and/or carburetor obstructed.		 -
47
-
-
Uneven running 1. Spark plug defective or incorrect gap.
2. Air cleaner dirty.		 51
47
Engine overheats 1. Spark plug gap incorrect.
2. Air cleaner dirty.
3. Engine cooling fins clogged.
4. Oil level too low.
5. Starter pulley clogged by grass cuttings, etc..		 51
47
-
27
-
Mower vibrates excessively 1. Blade or engine bolts slack.
2. Blade unbalanced.		 61
61

Troubleshooting and error codes

Problem Probable cause Page
Engine does not start 1. No gas.
2. Throttle lever is in “SLOW" position.
3. The ignition key is on “STOP” position.
4. Spark plug cord incorrectly attached or disconnected.
5. Spark plug defective or incorrect gap.
6. Engine flooded.
7. The fuse is blown.		 19
31
31
51
51
37
69
The starter won't turn 1. The battery is discharged.
2. The battery is disconnected.
3. The fuse is blown.		 69
69
69
Starting difficult or loss of power 1. Impurities in gas tank.
2. Air cleaner dirty.
3. Water in gas tank and in carburetor.
4. Gas tank filler cap vent and/or carburetor obstructed.		 -
47
-
-
Uneven running 1. Spark plug defective or incorrect gap.
2. Air cleaner dirty.		 51
47
Engine overheats 1. Spark plug gap incorrect.
2. Air cleaner dirty.
3. Engine cooling fins clogged.
4. Oil level too low.
5. Starter pulley clogged by grass cuttings, etc..		 51
47
-
27
-
Mower vibrates excessively 1. Blade or engine bolts slack.
2. Blade unbalanced.		 61
61