January 10, 2024

Log Splitter: Why won't my log splitter's engine start?

A dirty carburetor, bad gasoline, failed spark plug or broken recoil starter can prevent the log splitter engine from starting.

Stale gas won't start the engine. If you left gas in the fuel tank for more than 6 months without adding fuel stabilizer, drain the tank and fill it with fresh gas. Add fuel stabilizer to gas to keep it fresh.

Bad gasoline can clog the carburetor, so clean and rebuild the carburetor if the engine doesn't start after replacing the gas in the fuel tank. Replace the carburetor if it's too clogged to clean.

A dirty spark plug won't ignite the fuel to start the engine. Complete a full tune-up that includes replacing the spark plug, air filter and oil.

If the recoil starter won't spin the engine when you pull the starter rope, then you'll likely need to replace the recoil starter.

log splitter

THESE REPAIRS MAY HELP SOLVE YOUR LOG SPLITTER PROBLEM

JC-LS-Replace-the-log-splitter-carburetor

Replace the log splitter carburetor

The log splitter's carburetor mixes air with fuel in the proper proportion to produce a combustible gas. That gas/air mixture is pulled into the cylinder, where the piston compresses it and the spark plug ignites it. Over time, varnish from stale gasoline builds up in the carburetor, decreasing the amount of air/fuel mixture reaching the engine. Replace the log splitter carburetor if it's severely clogged with varnish or if the orifices are clogged with debris and can't be cleared using carburetor cleaner and compressed air.

Log splitter carburetor

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RG-LS-Replace-a-Log-Splitter-Carburetor-Intro-Image
March 01, 2013

How to replace a log splitter carburetor

If a log splitter runs rough or won't start, the carburetor may be clogged or the seals may be worn. This DIY repair guide explains how to replace the carburetor on a log splitter in just 30 minutes.

Repair difficulty
Time required
 30 minutes or less
JC-LS-Replace-the-log-splitter-recoil-starter

Replace the log splitter recoil starter

The log splitter's recoil starter engages and starts the engine when the starter rope is pulled. If the pull rope doesn't retract, it's likely that the spring inside the recoil starter is broken. The recoil starter can also fail to engage the engine when the rope is pulled, and the engine won't start. Replace the recoil starter if the spring breaks or if the recoil starter doesn't engage the log splitter engine.

Log splitter recoil starter

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RG-LS-Replace-a-Log-Splitter-Recoil-Starter-Intro-Image
March 01, 2013

How to replace a log splitter recoil starter

If you log splitter won't start because the recoil starter rope is stuck or won't retract, the starter spring or pulley might be broken. This DIY repair guide gives instructions on how to replace the recoil starter on a log splitter in 6 quick steps.

Repair difficulty
Time required
 15 minutes or less
JC-LS-Rebuild-the-log-splitter-carburetor

Rebuild the log splitter carburetor

Rebuild kits are available for most log splitter carburetors. The carburetor rebuild kit contains essential components such as jets, pins, seals and gaskets for overhauling the log splitter carburetor. You can sometimes fix a fuel supply problem by disassembling, cleaning and rebuilding the carburetor.

Rebuild the log splitter carburetor

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JC-LS-Tune-up-the-log-splitter-engine

Tune up the log splitter engine

A tune-up restores the log splitter's engine to its peak operating condition. A tune-up includes changing the oil, cleaning the engine, replacing the air filter, checking the ignition system, inspecting the carburetor, adjusting the throttle and choke controls, and adjusting and lubricating all moving parts.

Tune up the log splitter engine

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Most common symptoms to help you fix your log splitters

Choose a symptom to see related log splitter repairs.

Main cause: worn hydraulic valve seals around the actuator rod…

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Main cause: worn hydraulic cylinder seals…

Main cause: worn hydraulic pump seals…

Main causes: leaky head gasket, damaged sump gasket, leaky oil drain plug, damaged fuel line, bad carburetor seals…

Main causes: dirty carburetor, bad spark plug, clogged air filter, stale fuel…

Main causes: dirty carburetor, stale fuel, bad spark plug, broken recoil starter…

Most common repair guides to help fix your log splitters

These step-by-step repair guides will help you safely fix what’s broken on your log splitter.

How to replace a log splitter recoil starter

How to replace a log splitter recoil starter

The recoil starter spins the engine on the log splitter when you pull the starter rope, and the rope retracts when relea…

Repair difficulty
Time required
 15 minutes or less
How to replace a log splitter flexible pump coupler

How to replace a log splitter flexible pump coupler

The flexible nylon log splitter pump coupler deteriorates over time. Replace the flexible pump coupler if it begins to v…

Repair difficulty
Time required
 15 minutes or less
How to replace a log splitter fuel line

How to replace a log splitter fuel line

The fuel line carries the fuel supply from the gas tank to the carburetor. If the fuel line is cracked and leaking, repl…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your log splitters

Use the advice and tips in these articles to get the most out of your log splitter.

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…

Log splitter common questions

Log splitter common questions

Learn more about your log splitter with these frequently asked questions.…

How to change the hydraulic fluid in a log splitter

How to change the hydraulic fluid in a log splitter

Learn how to change the hydraulic fluid in your log splitter.…