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Post by Homelitexl923 on May 4, 2020 2:49:53 GMT -5
All you'll need is a carb rebuild kit.A new carb,if you can even find one will be quite expensive - in the $100 range,if not more.If you have a Tillotson carb on your saw you'll need a Tiollotson RK23HS kit. already rebuilt it. the problem is it is not getting enough fuel to the engine, but i dont know what part to replace.
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Post by Homelitexl923 on May 4, 2020 2:52:54 GMT -5
i know it has enough spark and everything is fine but there is a crack in a fuel pump somewhere that i think it sucking air not fuel. just not sure what pipe and where it is.
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Post by edju1958 on May 4, 2020 8:42:44 GMT -5
The fuel pump is a diaphragm on the inside of the carb.How many turns out are the lo & hi needles from being seated?They should be between 1 & 1/1/2 turns out.
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Post by Clasec on May 4, 2020 11:20:46 GMT -5
Also the pulse port could be blocked or partially blocked. The port is the small opening in the carburetor to intake gasket. It supplies crankcase vacuum pulses to the carburetor fuel pump.
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Post by edju1958 on May 4, 2020 11:29:05 GMT -5
Classec has a good point,you could have the gasket on wrong which would block the impulse hole.All the holes must line up correctly.
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Post by homelitexl923 on May 4, 2020 17:45:57 GMT -5
The fuel pump is a diaphragm on the inside of the carb.How many turns out are the lo & hi needles from being seated?They should be between 1 & 1/1/2 turns out. Yes I made sure both were 1/1/4
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Post by Homelitexl923 on May 7, 2020 2:40:24 GMT -5
also just making sure the fuel to be using is 16:1, correct?
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Post by xl130 on May 7, 2020 4:18:52 GMT -5
also just making sure the fuel to be using is 16:1, correct? That’s pretty rich. You should probably be mixing in the 32:1 to 50:1 range. I mix 40:1 in my saws. I am far from the supreme expert on fuel oil mixture but I think it really depends on the quality of two cycle oil you are using. That 16:1 mixture is a bit out dated I think. Probably was meant for the oil production at the time that saw was built. Oil quality has greatly improved.
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Post by sweepleader on May 7, 2020 7:49:40 GMT -5
Leon and others here run 80:1 with synthetic oil. Many, including myself, run 40 or 50:1, with modern petroleum oils. Remember, changing the oil ratio means retuning to prevent lean conditions. More oil (like going from 40:1 to 16:1) means the mix goes lean, enrich the carb adjustments to compensate.
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Post by Homelitexl923 on May 8, 2020 2:28:24 GMT -5
Leon and others here run 80:1 with synthetic oil. Many, including myself, run 40 or 50:1, with modern petroleum oils. Remember, changing the oil ratio means retuning to prevent lean conditions. More oil (like going from 40:1 to 16:1) means the mix goes lean, enrich the carb adjustments to compensate. i just thought it was 16:1 because it has a sticker on the saw that says that. But, you have a fair point that modern oil is better than older oil and fuel. But 16:1 wouldnt have hurt it would it??
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Post by xl130 on May 8, 2020 11:10:38 GMT -5
Leon and others here run 80:1 with synthetic oil. Many, including myself, run 40 or 50:1, with modern petroleum oils. Remember, changing the oil ratio means retuning to prevent lean conditions. More oil (like going from 40:1 to 16:1) means the mix goes lean, enrich the carb adjustments to compensate. i just thought it was 16:1 because it has a sticker on the saw that says that. But, you have a fair point that modern oil is better than older oil and fuel. But 16:1 wouldnt have hurt it would it?? In the long run yes it will cause carbon build up in places that you don’t want. The worst case that I can think of would be building up on the cylinder and piston which may lead to scoring up the piston. That’s very common from what I’ve seen on a few old saws that were run heavy on the oil. Spark plug fouling from carbon build up may also be evidence of running too rich. Plugging up the exhaust in extreme cases is apparently a possibility, however I’ve never seen that personally. Short term you would be less likely to have caused any real damage. Spark plug fouling and excessive blue smoking from the exhaust would be the most likely thing to see if you ran a tank at 16:1....... Best to only add only as much oil as you need to you fuel. I would think 40:1 is good unless you have a high end synthetic oil. 40:1 should be safe. But if you do a quick google search which I’m sure you have already you will see a lot of opinions on this topic.
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Post by Homelitexl923 on May 10, 2020 6:44:38 GMT -5
Classec has a good point,you could have the gasket on wrong which would block the impulse hole.All the holes must line up correctly. i will check for this problem and see if that helps anything. Thanks for the advise.
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Post by Homelitexl923 on May 22, 2020 6:57:02 GMT -5
checked the gasket and pretty sure it is on right so im kind of stumped.
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Post by sweepleader on May 22, 2020 7:42:26 GMT -5
If you still think there is an air leak somewhere, I would suggest that you change all the hoses. They are pretty cheap and normally pretty easy to change. If there is a doubt, that is where I would go first.
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