Echo weed trimmer

Okay the RB-K66B was a fixed jet version it was replaced by the RB-K70A per Zama

Which currently superseded again.

Cross reference.

These are adjustable.

I had a few with the main adjustable jet clogged.

purse said:

Yes a replacement for the Zama from hipa. I have been working on my own stuff for 30+ years including chainsaws and riding mowers. The kit is more money then the replacement carb. I have bought hipa carbs in the past without any issues. I suppose it could happen a defective carb. You mention taking it to a shop,problem is it will cost more to repair than what it’s worth.

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Once again, go through the OEM Zama carburetor and clean it. Hipa has good aftermarket parts, however, aftermarket carburetors on 2-stroke handheld equipment can be more hit or miss.

Lately it seems like the Chinese are just not up to par like they were before the higher tariffs. Especially when they can't get a spindle pulley right. I order some Bad Bot aftermarket pulleys; they were well made,actually beefier. The problem they didn't get the offset right. I had to remove an 1/8 inch the center hub so the pulley sit right and not rub on the safety covers. Still usable just got machine off that 1/8 inch. The same with other aftermarket BB pulleys I ordered.

And 2 cycle carbs are more miss than hit lately.

purse said:

Working on an echo SRM-230 weed trimmer. It starts and idles great. Problem is, just doesn’t rev up. I Change the carb ,fuel lines , clean exhaust port and screen, replaced the spark plug. Has 110 lbs of compression. No matter what you do adjusting the high doesn’t make a difference. My question is , would a faulty coil have anything to do with keeping it from throttling up ? It starts right up on two pulls cold and one pull when warm.

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Have you replaced the fuel pickup/fuel filter? I have had 2 cycle trimmers that would not run right until I replaced the fuel filter

Cfs said:

Have you replaced the fuel pickup/fuel filter? I have had 2 cycle trimmers that would not run right until I replaced the fuel filter

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Not sure of your carb but the SRM225 trimmer carb has an adjustment screw hidden by a small plastic cap. Cap needs to be removed to get to the brass screw. Once the cap is out you can open or close to get better performance. I gave found In some cases just moving it a turn in or out and resetting to where was was set originally makes it run better. Must break some crud free or sonething.
Spit