SIMPERAC Carburetor for Ryobi 25cc Trimmer — Direct-Fit 307160001 Replacement with Fuel Line Kit

The SIMPERAC 307160001 carburetor is a direct-fit replacement designed to restore fuel delivery and starting reliability to 25cc Ryobi and compatible 2-cycle trimmers.

When a small-engine trimmer runs rough, floods, won’t idle, or fails to start, the carburetor is often the culprit. This SIMPERAC unit is built to match the original equipment dimensions and mounting points used on many Ryobi full-crank 2-cycle models and some MTD machines, making it a straightforward service part for homeowners and landscapers who need quick field repairs.

Will this carburetor fit my Ryobi trimmer?

Yes — the 307160001 replacement is manufactured to be compatible with a range of Ryobi 25cc full-crank 2-cycle trimmers. It also fits equivalent MTD part numbers, so you can swap it in without modifying the engine if your model is listed.

• Covers Ryobi models: RY252CS, RY253SS, RY251PH, RY254BC and variants (including VNM versions).
• Replaces OEM part numbers: 307160001, 307160011, 307160009.
• Compatible with MTD reference: 753-06258A / 753-06258.
• Designed for 2-cycle 25cc trimmer and brush cutter engines.

How easy is it to install and what’s included?

Installation is intended to be simple for anyone comfortable with basic small-engine maintenance; the unit uses the same mounting and fuel connections as the original carburetor on supported models. SIMPERAC includes essential consumables so you can replace the part and the small wear items in one visit to the bench.

• Package contents: 1 carburetor and 1 AC04122 fuel line kit.
• Accessory bundle: 2 air filters, 2 primer bulbs, 2 gaskets, and 1 fuel filter.
• Additional parts: 2 fuel lines, 2 spark plugs, and 2 fuel line joints for easier hookup.
• Pre-assembled connections match common Ryobi layouts for a faster swap.

What performance differences should I expect after replacement?

Replacing a worn or clogged carburetor should return smooth idle, reliable starting, and steadier throttle response without having to overhaul the engine. While this part addresses fuel-metering problems, final tuning of idle and mixture screws may be necessary to match local fuel or altitude conditions.

• Improves starting and reduces stalling caused by poor fuel flow or leaks.
• Restores consistent idle and acceleration across throttle range.
• Often eliminates flooding and hard-start symptoms from degraded carbs.

Are spare parts and tuning required after installation?

Most installations are plug-and-play, but a brief post-install check and minor adjustments help ensure optimal operation. Inspect fuel lines and primer bulb seating, then set idle and mixture per the engine manual if needed.

• Verify fuel lines are tight and the primer bulb compresses correctly.
• Replace air filter and spark plug if they show wear—two are included in the kit.
• Use the engine’s service guide to fine-tune idle and mixture screws safely.

Who this is for: This SIMPERAC carburetor kit is aimed at DIY homeowners, lawn-care pros, and small-equipment repair shops working with Ryobi 25cc full-crank 2-cycle trimmers or compatible MTD machines. If your trimmer exhibits hard starting, rough idle, flooding, or poor throttle response and your model appears on the compatibility list, this replacement provides a cost-effective route to restoring dependable field performance.