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Post by dfkustom on Feb 9, 2023 13:52:31 GMT -5
hello,
I have a problem with the Tillotson hs125B carburettor, which pushes its gas back into the air chamber when I crank the saw to start it…
the lever is flush, the carburettor has been cleaned twice in the ultra sonic machine. . OEM kit .. all pressure test have been done 2 times and all passed .. line + fuel filter replace .. without throwing flowers to me lol I consider myself very good in carburettor but here I need someone REALLY REALY good at helping me lol
TANKS FRIENDS
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Post by undee70ss on Feb 9, 2023 15:49:45 GMT -5
Most likely a broken or missing Reed. You should also mention the model of saw you are working on.
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Post by dfkustom on Feb 9, 2023 16:25:14 GMT -5
Most likely a broken or missing Reed. You should also mention the model of saw you are working on. VI-130SL .. Reed valve ok |
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Post by undee70ss on Feb 9, 2023 16:47:14 GMT -5
Hold your hand over choke while pulling rope, do you feel air being pushed back through carburetor?
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Post by dfkustom on Feb 9, 2023 19:25:08 GMT -5
Hold your hand over choke while pulling rope, do you feel air being pushed back through carburetor? Hi really hard to say.. The saw has so much compression I can't stabilize it to feel a slight loss.. but I can confirm that if it loses it does not lose much because I feel nothing with my hands |
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Post by dfkustom on Feb 9, 2023 19:28:39 GMT -5
the saw have this problem of backflow only with the choke on and the trottle lock engages
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Post by xl130 on Feb 9, 2023 23:18:13 GMT -5
Good spark? Put a shot of gas in the spark plug or carb throat and cable the saw with the throttle wide open. It should at least bark
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Post by fossil on Feb 10, 2023 11:04:17 GMT -5
What do you mean by the "air chamber"
If it's the metering side of he carb (the side with the needle and lever) that's supposed to be filled with fuel mix.
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Post by dfkustom on Feb 10, 2023 12:06:59 GMT -5
What do you mean by the "air chamber" If it's the metering side of he carb (the side with the needle and lever) that's supposed to be filled with fuel mix. Carb box, trottle handle air box…. |
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Post by fossil on Feb 10, 2023 12:30:39 GMT -5
Does the saw run?
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Post by dfkustom on Feb 10, 2023 14:02:00 GMT -5
Nop … I just noticed that I have no fire at Low rpm.. I only have it in Hi rev...I was checking with my drill to turn the flyweel to check my fire...🤦♂️ I believe that my problem is there but I do not understand why the gas came out by lntake of the carburettor |
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Post by fossil on Feb 10, 2023 18:47:16 GMT -5
You are dumping fuel into the throttle bore which will puddle a bit behind the venturi restriction.
Several pulls will do that.
Nothing to worry about.
I assume by the carb model that you have an XL-76 or 130. Which ignition system do you have in it?
If you are lucky enough to have a points ignition, you should be able to service that.
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Post by dfkustom on Feb 11, 2023 11:43:02 GMT -5
I have a bad coils I had fire in hi rev but not in very low rpm.. I replaced the coil and everything is ok
tanks group
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Post by dfkustom on Feb 11, 2023 11:44:29 GMT -5
I have a bad coils I had fire in hi rev but not in very low rpm.. I replaced the coil and everything is ok tanks group I replaced the complete Prestolite system with a Wiko with an oregon chip… |
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