Hipa Ignition Coil for Ryobi 25cc Trimmers — 291337001 Replacement Kit with Spark Plug and Boot

Hipa replacement ignition coil 291337001 is a plug-and-play ignition module and spark plug kit made to restore spark to compatible Ryobi 25cc 2-cycle string trimmers.

If your Ryobi 25.4cc or 25cc trimmer won't start or stalls unexpectedly, a worn or damaged ignition coil is often the culprit. This Hipa assembly replaces Ryobi part number 291337001 and includes the coil, attached lead wire, rubber spark plug boot, and a replacement spark plug so you can swap the faulty module without hunting for extra parts. It’s built to fit Ryobi RY251PH, RY252CS, RY253SS, and RY254BC models and is intended for routine maintenance or bolt-in repairs.

How will this ignition coil fix my trimmer’s starting problems?

When the coil fails, the engine won’t get the high-voltage pulse needed to ignite the air-fuel mix, so the unit refuses to start or cuts out. Installing this replacement restores the electrical path from the magneto to the spark plug and brings back consistent spark timing. Basic mechanical skills and common tools are all that’s required for the swap.

• Direct replacement for Ryobi part #291337001
• Includes ignition coil, lead wire, rubber boot, and new spark plug
• Designed to fit Ryobi 25cc and 25.4cc 2-cycle trimmers
• Re-establishes spark to resolve dead-or-stalling engines

Which Ryobi models and engine sizes does this part work with?

This Hipa coil is compatible with a specific lineup of Ryobi single-cylinder 2-cycle string trimmers. Confirm your model number before ordering to ensure fit — the part is tailored to the 25cc class of handheld trimmers. It replaces OEM coil number 291337001 across the listed models.

• Fits Ryobi RY251PH, RY252CS, RY253SS, RY254BC
• Compatible with 25cc and 25.4cc two-stroke engines
• Works as an OEM-equivalent replacement for part #291337001

What comes in the package and what tools are needed for installation?

The kit arrives ready to install: an ignition coil assembly with the attached lead and rubber spark plug boot plus one spark plug. You’ll typically need a screwdriver, socket or nut driver for the flywheel cover, and a spark plug socket for replacement. Follow safe engine-handling steps: disconnect fuel source and remove the ignition key or spark plug lead before starting work.

• Package includes 1 ignition coil and 1 spark plug
• Requires basic hand tools: screwdriver, spark plug socket, possible flywheel puller
• Simple bolt-on installation for experienced DIYers

How can I tell if the coil is faulty versus other ignition issues?

Diagnosis starts by checking for spark: remove the spark plug, reconnect to the boot, ground the plug to the engine and pull the starter — no visible spark indicates ignition failure. Also inspect wiring, the rubber boot, and physical damage; sometimes only the boot or plug is the problem. If other components are intact, replacing the coil assembly with this Hipa unit is an efficient next step.

• No spark at plug tip suggests coil or lead failure
• Check for cracked boots, frayed wires, or visible corrosion first
• Includes a new spark plug to exclude plug-related no-starts

Who is this for: This replacement ignition coil kit is aimed at homeowners, landscapers, and small-engine technicians who maintain Ryobi 25cc/25.4cc string trimmers. It’s suited to anyone comfortable with basic small-engine repairs who wants a direct-fit OEM-equivalent part to restore reliable starting and operation without buying a new machine. Always verify model compatibility and follow safe maintenance procedures when installing.