On most Poulan chainsaws, the spark plug is near the top of the engine, beneath the plastic engine cover. A thick rubber spark plug boot connects an ignition wire to the plug, making it a useful landmark once the cover is removed. The exact access steps vary by model, so the owner’s manual is the best guide before taking anything apart. With the saw switched off, cool, and disconnected from the plug, the location is usually straightforward to check.
Where to Look for the Spark Plug
Start by looking at the top of the chainsaw’s engine housing, close to the cylinder and the area around the air filter. The spark plug is threaded into the cylinder head, where it ignites the fuel-and-air mixture inside the engine. On many Poulan models, a removable top cover hides the plug and the surrounding engine components.
After removing the appropriate cover, look for a short, insulated wire ending in a rubber cap. That cap is the spark plug boot, also called the spark plug connector. It presses over the top of the plug. The spark plug itself is a small metal component with a hex-shaped base for a socket and a ceramic insulator above it.
The plug is not the same as the fuel filter, air filter, or primer bulb. Those parts may also be visible around the engine, but the plug is identified by its connection to the thick ignition wire. Avoid pulling on that wire; when removal is necessary, grip the boot and pull it straight off the plug.
Why the Location Varies by Poulan Model
Poulan has produced many chainsaw models, including compact homeowner saws and larger models. Their covers, fasteners, and internal layouts are not identical. Some designs provide easy access after removing a top cover; others may require a particular sequence or additional components to be moved first. A model’s age and design can also affect the fastener type and the correct replacement plug.
Model names and numbers are usually printed on a label or stamped on the saw. The label may be on the body, near the handle, or around the engine housing, depending on the model. Record the complete model number before searching for instructions or ordering a replacement. Similar-looking saws can use different plugs, gaps, or access procedures.
For model-specific instructions, consult the Poulan Pro manuals page and search using the saw’s model information. If the manual is unavailable there, a parts diagram or an authorized service provider may help identify the correct cover and plug. Do not assume that a procedure or plug specification from another Poulan chainsaw applies to the saw at hand.
How to Access the Spark Plug Safely
Chainsaws have sharp cutting equipment and hot engine parts. Even a small inspection should begin with the saw in a stable position, away from fuel spills, dry grass, and other ignition sources. The following general steps describe typical access; the owner’s manual takes priority if it gives different directions.
- Switch off the saw. Move the ignition switch to the stop or off position. Do not work on a running or recently running saw.
- Let the engine cool. The muffler, cylinder, and nearby components can remain hot after use. Wait until the engine is cool enough to handle safely.
- Set the saw on a steady surface. Keep the guide bar and chain clear of people and objects. Wear work gloves, and avoid contact with the chain’s cutting edges.
- Disconnect the spark plug boot. Pull the rubber boot from the top of the plug, holding the boot rather than tugging on the wire. This helps prevent accidental ignition and reduces the chance of damaging the lead.
- Remove the access cover as directed. Use the manual to identify the correct cover and fasteners. Keep screws together and do not force a cover that will not lift free.
- Locate the plug. Follow the ignition wire from the boot to the plug seated in the cylinder head. Clear loose dirt around the plug before removing it.
For a location check, it may not be necessary to remove the spark plug itself. If a cover resists removal, a fastener is hidden, or a component seems to need force, stop and check the manual rather than prying. Forcing plastic covers can crack them, and incorrect reassembly can leave the saw unsafe or difficult to start.
Removing or Inspecting the Spark Plug
If the purpose is to inspect or replace the plug, first clean dust and debris from the area around its base. Dirt can fall into the cylinder when the plug is removed, so this simple step matters. Use a spark plug socket that fits the plug, along with the correct extension or tool specified for the model.
Turn the plug counterclockwise to loosen it, keeping the socket aligned with the plug. If it feels stuck or cross-threaded, do not force it. Once removed, check the plug’s condition and compare it with the manual’s maintenance guidance. Heavy deposits, a damaged ceramic insulator, a worn electrode, or persistent oil or fuel fouling may call for replacement or further troubleshooting.
When installing a plug, start the threads by hand to reduce the risk of cross-threading the cylinder head. Tighten it to the specification in the manual. Excessive tightening can damage the threads; insufficient tightening can also cause problems. Reconnect the boot securely and reinstall all covers and fasteners in the proper order before using the saw.
Finding the Correct Spark Plug and Gap
The correct replacement plug depends on the chainsaw’s exact model. A plug that physically fits may still have an unsuitable heat range or other specification. Check the manual or a model-specific parts listing for the recommended plug type and part number. If a listed part has been superseded, verify compatibility rather than choosing a plug based only on appearance.
The spark plug gap is the distance between the center and ground electrodes. It must match the specification for the model. There is no single gap value that should be applied to every Poulan chainsaw. Some plugs come pre-gapped, but shipping or handling can alter the setting, so the gap should be verified with an appropriate gauge when the manual calls for it.
A plug gap that is too wide or too narrow can affect ignition and starting. Adjusting the electrode without care may damage it, and some plug designs are not intended to be bent. Use the manual’s instructions and the correct gauge. When specifications are unclear, consult a qualified service provider or a model-specific parts source.
What a Spark Plug Can—and Cannot—Tell You
A spark plug inspection can provide clues about engine operation, but its appearance alone does not establish a diagnosis. A dry, heavily carbon-coated plug, a wet plug, or a damaged electrode may be associated with different issues. Fuel condition, choke use, air-filter condition, carburetor settings, ignition components, and operating habits can all affect what the plug looks like.
For example, a wet plug after repeated starting attempts may indicate that the cylinder has received fuel without starting, but the cause could involve flooding, ignition, or another condition. A sooty plug may have several possible explanations. Replacing the plug may be reasonable if it is damaged or outside the manual’s service guidance, but continued problems after replacement should not be attributed to the plug alone.
Use the model’s troubleshooting section for symptoms such as hard starting, stalling, or failure to start. Avoid testing for spark near spilled gasoline or vapors. If diagnosing ignition requires removing components or exposing a spark, follow the manual’s safety procedure or have the saw serviced professionally.
Common Mistakes to Avoid
- Searching in the wrong area: The plug is usually beneath the engine’s top cover, not inside the fuel tank or attached to the air filter.
- Pulling the ignition wire: Remove the connector by its rubber boot to avoid stressing or damaging the wire.
- Working while the saw is hot: Let the engine cool before touching the plug, cylinder, or nearby parts.
- Using a generic plug specification: Confirm the plug type and gap for the exact model.
- Forcing the cover or plug: Check for hidden fasteners, use the correct tool, and stop if a part will not move normally.
- Reassembling carelessly: Missing screws or an improperly seated cover can create operating and safety problems.
Quick Reference
| Question | General answer |
|---|---|
| Where is the spark plug? | Usually near the top of the engine, beneath the engine cover, threaded into the cylinder head. |
| What identifies it? | A rubber boot connected to a thick ignition wire sits over the plug. |
| What should be done first? | Switch off the saw, let it cool, and disconnect the boot before inspection. |
| What plug should be installed? | The type and gap specified for the exact chainsaw model in its manual or parts listing. |
When to Get Service Help
Professional service is sensible if the engine cover will not come off as described, the plug threads appear damaged, the ignition wire or boot is torn, or the saw continues to have starting problems after basic maintenance. A technician can also help confirm the correct plug and gap when the model information is missing or the available documentation is unclear.
For routine access, the key landmark is simple: follow the spark plug wire to its rubber boot beneath the engine cover. Before removing parts, verify the procedure in the owner’s manual for the specific Poulan chainsaw. That avoids unnecessary disassembly and helps ensure the saw is safely reassembled.