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post #1 of 9 Old 10-17-2019, 02:05 PM Thread Starter
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Carb Adjusting Probs - Time for Rebuild?

OK, got this old Echo 330 T. It starts, runs fine on low speed. Now, when it's time to cut and you pull the trigger, it dies. I have tried to feather it, adjust the high side in all directions, and still can't get it to go to stay running at high speed. I did have it working the other day after feathering the throttle. Sounds like it might be time for a rebuild, or a new carb. Pretty easy to rip out the carb on this model. I guess this saw is somewhere around 12 - 15 years old.

Come to think of it, it has not been running great for a while, as in 6 mos. At wide open throttle speed fluctuates up and down a lot. Thanks for any opinions y'all may have.

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post #2 of 9 Old 10-17-2019, 02:17 PM
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Re: Carb Adjusting Probs - Time for Rebuild?

Donít forget to replace the diaphragm if it isnít included with the carb kit!
For a fact, thatís all the problem might be...
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post #3 of 9 Old 10-17-2019, 07:37 PM
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Re: Carb Adjusting Probs - Time for Rebuild?

On engines that old, sometimes the problem isnít actually the carb, but the carb gaskets start leaking air through making the mixture way to lean.


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post #4 of 9 Old 10-18-2019, 12:36 AM
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Re: Carb Adjusting Probs - Time for Rebuild?

Also, check that the muffler screen isn't clogged. It will idle fine but will bog on throttle up.

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post #5 of 9 Old 10-18-2019, 01:29 AM
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Re: Carb Adjusting Probs - Time for Rebuild?

Also check your fuel lines... sounds like it might be sucking air. If they've never been replaced they're well past their due date.

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post #6 of 9 Old 10-18-2019, 08:21 AM
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Re: Carb Adjusting Probs - Time for Rebuild?

Air leak.

Do not run until a vacuum test is done or you'll burn it down.

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post #7 of 9 Old 10-18-2019, 04:18 PM
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How do you do a vacuum test?
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post #8 of 9 Old 10-18-2019, 06:25 PM
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Re: Carb Adjusting Probs - Time for Rebuild?

Quote:
Originally Posted by Ariens93GT20 View Post
How do you do a vacuum test?

Case DX 33 with loader

John Deere 2305, 62" deck, &47" snowblower.

JD X758 60" HC deck

Simplicity Conquest, 50" w/turbo bagger

Husqvarna , OE Tree Monkeyed 346XP, 346XP ported, 357XP x 2, 562XPG, 372XPG ported, 288XP Lite ported, 395XP
Dolmar 7900
Jonsered 2159 ported
Echo CS303T
Echo PPT 266
Stihl 028 Super
Echo PPT-266 pole saw
Iron & Oak Commercial w/ log lift, hydro 4 way
Silvey 510
Oregon 511AX
Nielsen 100B for rakers
F250 8' box, 18' trailer w/5200 axels
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post #9 of 9 Old 10-19-2019, 04:53 PM
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Re: Carb Adjusting Probs - Time for Rebuild?

Another 50 or 60 spent on tools will not be happening. Will just replace the seals and have it over with.
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