Lawn-Boy 10550 User Manual

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Operator’s Manual

Para obtener una versión gratis de este manual en español, escriba a la dirección

indicada más abajo. Asegúrese de indicar el modelo y el número de serie de su producto.

Pour obtenir gratuitement une version en français de ce manuel, écrivez à l’adresse

ci–dessous. N’oubliez pas d’indiquer les numéros de modèle et de série de votre produit.

Lawn-Boy Inc., Attn: Parts Dept., 8111 Lyndale Ave S, Bloomington, MN 55420-1196.

Domestic English (EN)

Form No. 3325-494 Rev A

GoldPro Series



Walk Power Lawn Mower

10424—210000001 and Up

10550—210000001 and Up

10552—210000001 and Up

Table of Contents

Questions and Answers:

J
Jason ClarkAug 5, 2025
How to fix Lawn-Boy Lawn Mower that won't start?
- M
  Matthew EstradaAug 6, 2025
  If your Lawn-Boy Lawn Mower engine won't start, several issues could be the cause. First, ensure the fuel tank isn't empty and the fuel is fresh. If that's not the problem, check that the throttle lever is in the Fast position and that you've pressed the primer three times. Also, make sure the wire is securely connected to the spark plug. Inspect the spark plug itself; if it's pitted, fouled, or the gap is incorrect, adjust or replace it. Additionally, check the fuse and replace it if blown. Finally, if your model has a battery, ensure it's adequately charged.
J
Jennifer MayAug 10, 2025
What to do if Lawn-Boy Lawn Mower engine starts hard or loses power?
- S
  Stephen WolfeAug 10, 2025
  If your Lawn-Boy Lawn Mower engine starts with difficulty or loses power, start by draining the fuel tank and refilling it with a fresh gasoline-and-oil mixture. A dirty air filter element could also be restricting airflow, so replace it. Check the underside of the lawn mower deck for clippings and debris, and clean it if necessary. Finally, inspect the spark plug; if it's pitted, fouled, or the gap is incorrect, adjust or replace it.
D
david90Aug 14, 2025
Why does my Lawn-Boy Lawn Mower engine run rough?
- B
  bailey44Aug 14, 2025
  A Lawn-Boy Lawn Mower engine might run rough due to several reasons. Ensure the wire is securely connected to the spark plug. Inspect the spark plug itself; if it's pitted, fouled, or the gap is incorrect, adjust or replace it. Also, verify that the throttle lever is in the Fast position. Lastly, a dirty air filter element restricting airflow can cause this issue, so replace it if necessary.
R
Rebekah CastilloAug 19, 2025
Why is my Lawn-Boy Lawn Mower or engine vibrating excessively?
- K
  kristin06Aug 19, 2025
  Excessive vibration in your Lawn-Boy Lawn Mower or its engine can stem from a few sources. Start by checking the blade; if it's bent or out of balance, balance or replace it. Ensure the blade nut is tightened securely. Also, clean the underside of the lawn mower deck to remove any accumulated clippings and debris. Lastly, verify that the engine mounting bolts are properly tightened.
R
reedlaurieAug 23, 2025
How to fix uneven cutting pattern with Lawn-Boy Lawn Mower?
- C
  Carlos WatsonAug 23, 2025
  To correct an uneven cutting pattern with your Lawn-Boy Lawn Mower, first ensure all four wheels are set at the same height. If the blade is dull, sharpen and balance it. Avoid mowing in the same pattern repeatedly by changing the mowing pattern. Also, clean the underside of the lawn mower deck to remove any accumulated clippings and debris.
J
Justin GutierrezAug 27, 2025
What causes the discharge chute to plug on my Lawn-Boy Lawn Mower?
- H
  hughesbradAug 27, 2025
  A plugged discharge chute on your Lawn-Boy Lawn Mower can occur for several reasons. Make sure the throttle lever is in the Fast position. If the cutting height is too low, raise it. Avoid mowing too fast, so slow down your pace. Ensure the grass is dry before mowing. Finally, clean the underside of the lawn mower deck to remove any accumulated clippings and debris.
A
Albert TaylorAug 31, 2025
What to do if Lawn-Boy Lawn Mower does not self-propel?
- J
  James RobinsonAug 31, 2025
  If your Lawn-Boy Lawn Mower is not self-propelled, it may be due to the self-propel drive cable being out of adjustment or damaged; adjust the cable or replace it if needed. Also, check for and remove any debris under the belt cover.

Lawn-Boy 10550 Specifications

General

Engine Type	2-Cycle
Cutting Width	21 inches
Deck Material	Steel
Start Type	Recoil
Drive Type	Self-Propelled
Fuel Type	Gasoline
Cutting Height	1.25 - 3.75 inches
Wheel Size	8 inches
Starter Type	Pull start

Summary

Safety Guidelines

General Lawn Mower Safety

General safety guidelines for operating lawn mowers.

Assembly and Setup

Mixing Gasoline and Oil

Proper procedure for mixing fuel and oil for the engine.

Operation

Starting and Stopping the Engine

Procedures for starting and stopping the lawn mower engine.

Using the Self-propel Drive

Instructions for operating the self-propel drive system.

Adjusting the Cutting Height

Steps to adjust the mower's cutting height.

Maintenance

Recommended Maintenance Schedule

A schedule of maintenance tasks and intervals.

Cleaning the Lawn Mower Housing

Servicing the Air Filter

Spark Plug and Blade Maintenance

Guide to maintaining the spark plug and cutting blade.

Troubleshooting

Engine Starting Problems

Common causes and solutions for engine starting issues.

Engine Performance Issues

Operational Issues

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