Echo SRM-225 Carburetor Kit (RB-K93)
- SRM-225
- SRM-225i
- SRM-225SB
- +12
$15.98 – $16.98
Reputable small engine parts dealer
Carburetors and tune-up kits for trimmers, blowers, saws, mowers and generators. Type the model off your machine and we will show you what fits.
Every kit is matched to the original part number. Pick your machine, then check the model list on the card.
String Trimmer & Brushcutter CarburetorsFits brands
Leaf Blower Carburetors & Tune-Up KitsFits brands
Chainsaw & Tiller CarburetorsFits brands
Mower, Generator & Pressure Washer Engine PartsFits brands
Fuel Lines, Primer Bulbs, Filters & Carb ToolsFits brands
$15.98 – $16.98
$18.98 – $19.98
$5.99
$15.75
$14.98
$4.95 – $5.93
$19.98
$15.88 – $17.88
Trimmers, edgers, blowers and saws run on mixed fuel through a diaphragm carburetor the size of a matchbox. When they sit with old gas, the diaphragm hardens first. Our kits replace the carb together with every rubber part around it.
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Mowers, pressure washers and generators use float-bowl carburetors that varnish when the bowl dries out. Fresh carb, gaskets and plug, and a mower that has sat since October idles cleanly again.
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Our carbs leave the factory set, so most never need a turn. If yours does, these are the screws you will meet.
Sets the fuel share at full throttle. Clockwise leans it out, counter-clockwise makes it richer. Move a quarter turn at a time.
Sets the mixture at idle and off-idle. A lean L screw makes the engine stumble when you squeeze the trigger.
Opens the throttle plate a little to set idle rpm. Turn it down if the trimmer head spins at idle.
On some carbs, trims the air intake at idle. Leave it where it is unless the idle hunts after a new carb.
We started Huztl because small engines deserve better than a trip to the dump. Most trimmers, blowers and mowers that will not start are one tired carburetor, a cracked bulb or a split fuel line away from another ten years of work.
We work with carburetor factories that build to the original patterns, test every unit on a wet-flow bench, then pack it with the gaskets, bulbs and filters that failed alongside it. The goal is simple: you bolt it on, prime it and it fires on the first pull.
More about Huztl
Fixing your own machine is quicker than you think. Our guides walk you through reading the carb stamp, setting the H and L screws and finding the real reason an engine will not start.
From people who fixed it themselves.
Trimmer sat two winters in the garage. Swapped the carb and all the lines from the kit, primed it six times and it fired on the second pull. Idle is rock steady.
Echo SRM-225 carburetor kitCompared it side by side with the old Zama, same casting, same linkage. Twenty minutes including cleaning the tank. Blows like new.
Stihl BG86 SH86 carburetorMy FS55 is a 2015 so I needed the newer carb with the Z cable end. Glad the listing explained it. Runs great, had to back the idle screw off a little.
Stihl FS38 FS45 FS55 carburetorGP5500 had sat since last hurricane season and would only run on choke. New carb and gaskets, now it starts first pull and holds load.
Generac GP generator carburetorDidn't expect the choke parts in the box. Mower used to flood every cold start, now it just goes.
Honda GCV190LA carburetorFinally could adjust the splined screws on my Poulan and Craftsman without chewing them up. Squared handle makes it easy to count quarter turns.
Carburetor adjusting toolHuztl builds replacement carburetors and tune-up kits for the outdoor power equipment most American households own: Echo, Stihl and Husqvarna string trimmers, handheld and backpack leaf blowers, Poulan Pro and Echo chainsaws, Mantis tillers, Honda-powered lawn mowers and pressure washers, Kohler riding mowers and Generac generators. Every carburetor follows the original Zama or Walbro pattern, so an Echo SRM-225 takes an RB-K93, a Stihl FS55 a C1Q-S97 or C1Q-S282, and a Husqvarna 125B a C1Q-W37.
A small engine that will not start, idles roughly or dies under load usually has one of three problems: stale fuel has varnished the carburetor, a fuel line or primer bulb has cracked, or the air filter is clogged. That is why most Huztl kits are more than a bare carburetor. You get the gaskets, primer bulbs, fuel filters, fuel lines, air filter and spark plug that wore out at the same pace, and one order covers the whole repair.
To find your part, read the model number on the engine housing, or the stamp on the side of your old carburetor, and type it into our part finder. Each product page lists every model it fits and every part number it replaces. If you are still unsure, send us the model plate photo and we will confirm before you order.
Our carburetors are set at the factory and wet-flow tested before they ship, so they bolt on and go. For the rare engine that needs a touch of adjustment, our splined carburetor tools and step-by-step guides make the job simple. Fixing machines anytime, anywhere is what we do.
Send us a photo of the model plate or the stamp on your old carburetor. We reply within a working day.