Echo CS-2511T Parts

The CS-2511T is a small saw with its own parts list. The carburettor, air filter and starter are specific to the 2511 family, and the only consumables it shares with the rest of Echo's range are the 50:1 oil and the 3/8-inch low-profile chain family.

The CS-2511T is a top-handle saw - the handle sits over the engine so it can be worked one-handed up a tree, which is why arborists buy it. That design, and the 25 cc engine, put it on a different parts platform from the rear-handle ground saws covered on the CS-310/352 and CS-400 pages. Its Walbro WT-1208 carburettor (genuine A021004690) is not the WT-946 of the CS-310 or the WT-985 of the CS-400, and the air filter A226001991 is unique to the 2511 family.

As with the bigger saws, the same engine was sold under Echo's sister brand: the CS-2511T's carburettor and running gear cross to the Shindaiwa 251TS, so Shindaiwa listings are valid parts sources when they quote the A021004690 number. The lesson is the one that runs through every model on this site - the number on the part decides fitment, not the badge on the shroud.

The CS-2511T runs the same 3/8-inch low-profile chain family as the small ground saws, but at the smallest size Echo makes: a 12-inch bar (genuine 12A4CD3745C) taking a 45-drive-link loop, typically 90PX45CQ. That is shorter than the CS-310's 14-inch 52-link loop and the CS-400's 16-inch 57-link loop, even though all three are the same pitch and gauge.

Because the pitch is shared but the length is not, a chain that fit a friend's small Echo saw will not drop onto a CS-2511T unless the drive-link count matches. The only safe way to re-order is to read the pitch, gauge and drive-link count off the old loop - 3/8" LP, .050", 45 DL for the factory 12-inch bar - rather than trusting the model name. Some CS-2511T bars are sold for 14-inch set-ups too, so confirm your bar length first. The full method is on the Echo chainsaw chain and bar page.

A CS-2511T that will not start follows the same cheap-part-first order as the rest of Echo's two-stroke range. Stale fuel first, then the in-tank fuel filter, then the primer bulb and fuel lines, then the spark plug, and only then the Walbro WT-1208 carburettor itself. The genuine 90196Y tune-up kit bundles the air filter, fuel filter and spark plug, which clears three of those checks in one purchase - the sensible first move on a saw that has sat over winter.

Keep the two oils straight: the engine runs 50:1 Power Blend in the tank, and the bar is lubricated separately with bar and chain oil - never the fuel mix. Running mix through the oiler, or forgetting the bar oil entirely, is the fastest way to ruin the bar and chain on a small saw worked hard. The full diagnosis sequence is on the carburetor and won't-start pages.