Ryobi

Experienced gardeners share their insights in answering this question :
Basics to check:
1) Spark plug – brown or dark brown – OK a) is it carbon or fuel fouled b) is there spark
2) Muffler remove for inspection a) exhaust screen clean or plugged b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check cylinder compression

Fuel starvation – ‘lean fuel’ condition
Basic things to check:1) spark plug2) spark arrestor in muffler3) fuel lines and tank filter4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn Chain Saws:5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:Remove Carburetor6) replace gaskets/diaphragms a) use a spray carb cleaner to clean jets, holes, and body of carb b) fuel pump diaphragm goes against the carb body, then the gasket towards the outside c) metering gasket goes against the carb body, and the diaphragm goes towards the outside

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

Checking the Fuel Mix

The most common problem with a strimmer not starting is that there`s a problem with the fuel mix. Double check that you`ve used 40 parts fresh unleaded petrol to 1 part 2-stroke oil (40:1). Check the petrol you`ve used isn`t stale.

The air filter may be clogged. If the air filter is clogged, the engine will get too much fuel and not enough air. As a result, the engine may not start. If the air filter is clogged, replace it.
The more worn or dirty spark plugs are, the greater the pull on the rewind and more effort is required to produce an adequate spark. If you haven`t turned on your engine recently, your mower won`t start and/or you have to tug repeatedly on the rewind to start the engine, a damaged spark plug may be the culprit.
Among the first things to check if your trimmer won`t start is the spark plug. In some cases, the spark plug may simply be dirty and need a thorough cleaning. To clean your spark plug, disconnect it and clean the area around it before removing it, advises Briggs and Stratton.
Check the following: Clogged muffler, clogged exhaust port, fuel restrictions, low compression, poor ignition spark, too much oil in gas or improper air/fuel mixture in carburetor. . Clean carburetor jets and air filter. Check clutch gear wheel for worn or greasy clutch pads.
2 stroke has fuel and spark but won`t start

You`ve confirmed that the gas is getting to the carb, and the spark plug is properly igniting, but your 2 stroke dirt bike won`t start. The most common causes are a dirty carb or low compression.

Homelite Ryobi Trimmer Replacement Champion RY4C Spark Plug # 870301002.
There may be old or bad fuel in the carburetor float bowl. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and make the engine hard to start. If the carburetor is clogged, try cleaning it with carburetor cleaner.
If your vehicle has lost its get-up-and-go, bad spark plugs could be the culprit. When a spark plug becomes fouled or dirty, it doesn`t spark effectively which can cause your car to perform sluggishly.
A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and prevent the engine from starting.
The most common problem with a string trimmer is that the unit runs out of string. The string may also be twisted or loose on the spool. The cutting head may be dirty or the head outlet guide may be bent. An electric trimmer`s power cord, switch, or motor may fail.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

I need the spark plug gap for an Ariens ST624E. the spark plug = 21533500
ANSWER : The recommended setting is .030″

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What should the spark plug gap be on a weedeater trimmer 25cc
ANSWER : Set it at .025

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<!– from fixya rte –>Spark plug gap setting poulan pro 033. – Poulan Pro Prod/Poulan Weedeater Poulan Pro PP5020AV 20" Gas Chain Saw
ANSWER : .025″ plug gap

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What is the spark plug gap for a NGK BPM8Y – Echo Cs-400 Chainsaws
ANSWER : 20-25 thou which is around 0.6mm

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What is the spark plug gap for a ryobi string trimmer model # ry30550 ?
ANSWER : I can’t say for sure, but it’s PROBABLY about 0.035″.

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I need the spark plug gap for a MTD mower model # 11A038A729. It has a Briggs 12M902 0451 E1. Thanks.
ANSWER : The proper gap is ..030″ Here is the Briggs application chart for L-Head engines like yours.
http://www.manddsmallengine.com/briggs/info/plug7.html

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Toro clear won't start – Toro Power Clear 621 R
ANSWER : Bad gas , plug ,air filter , no spark ck all need all 3 to start

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Need the spark plug gap – Poulan Pro 22" Self Propelled High Wheel Mower
ANSWER : .028 to .036

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