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Ryobi PBV-30A Carb problem

I havve a Ryobi PBV-30A two stroke blower vac.which runs ok on idle but very rough at speed. Orientation of the blower in use seems to affect the speed from very rough to better but not good.

The only apparent adjustment is the throttle stop screw for idle speed adjustment. I have disassembled the carb and cleaned (although it all looked ok) and refitted to no avail.

A new spark plug has been fitted.

Can anyone offer advice.

thanks

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Sell it as quick as you can..piece of s*#t !

Posted on Jan 03, 2015

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I have a rayobi PBV30A petrol trimmer and it keeps dying once you increase the throttle speed runs on idle.

Posted on Sep 04, 2011

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Ryobi 9600 backpack blower. Starts great. Set to run, continues running. Upon attempt to use throttle, engine dies. Acts like choking out but removed carb cover an choke is no closing.


this sounds strangely like the high speed jet/pathway in the carb is clogged up with something ,

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Low speed circuit on carb is blocked. You can try using fresh fuel with some high quality cleaner added and run it through and see if it clear. Otherwise it means the carb has to be removed for cleaning. Which is especially hard these days with the EPA carb plugs on the mixing needles. These plugs are to minimize tampering by owners. You need to be a licensed shop with the tools to adjust the carbs and then put new tamper plugs on nowadays..

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Why does a leaf blower keep stalling after a period of use?


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Many small carburator needles have plastic caps on them to limit how far they can be adjusted. If you need to go past their limited settings you'll have to break those caps off if you have them. Turn both the L and H needles in just to where they seat, not tight, then turn them out one full turn. Start the blower and let it warm up to operating temperature. With the motor idling, if necessary turn the L needle in or out to where it is idling smoothly. Turn it in until you notice the idle speed change or it starts running rough. Now turn it out, counting the turns, until you go past smooth idle and get to where it gets rough again. Turn it back in halfway and you're good on the L idle needle. For the H needle, hold the throttle at 3/4 full throttle and do the same thing to adjust the needle to half way between the rough running points.

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Ryobi pbv-30a will not start this blower was used about six times but is now out of warranty has a strong spark but will make no effort to start


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Its running too lean..there is a plastic cover over the carb adjustment screws


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Won't run at full speed continuously. Cycles speed up and down even at full throttle.


Check and make sure the exhaust outlet is totally open. If it has a metal gauze screen slide it out and wash with carby cleaner and replace.
Blocked exhausts are common problem in 2 stroke engines because users run the motor too slow and it ( + oily residue) carbons up the exhaust. With a blocked exhaust, usually the moror will start and idle pretty ok but will screw up when you try to run at full revs.

In Australia we get mud wasps building nests in there - a quick poke out of the mud and she's running full throttle again.

ps. Don't fiddle with the 2 mixture screws - unless your know what you are doing. You will only make it worse!!.

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