Author Topic: K760 carb  (Read 353 times)

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Offline Harry53187

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K760 carb
« on: September 12, 2017, 10:36:16 pm »
I have a k760 cut off saw. I couldn't get it to prime. I cleaned the carb and still couldn't get it to prime.. Bought a new carb. Still doing the same thing. If I take the carb out and put the priming bulb right on the line coming from the gas tank it primes right up.. what could be wrong. So confused..

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Offline bill saf

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Re: K760 carb
« Reply #1 on: September 13, 2017, 09:42:30 am »
could be a plugged impulse tube in the engine or a bad impulse line, bad diaphragm in carb /stiff or hole in it, plugged hole in the steel cover for the diaphragm.This is what I look for to start but you have all ready have a new carb so I would look at the first two. from what I can see is that the K760 came with a prime bulb so I would look at the base of the prime bulb it has a check valve in it it could be bad or stuck.

Offline joe_indi

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Re: K760 carb
« Reply #2 on: September 15, 2017, 10:04:32 pm »
My "redneck" method is to mix PU thinner and dishwasher liquid and immerse an inlet connection of the carb into it. If the primer sits on to of the carb. Use fingers to close the air inlet and outlet sides of the carb and then pump the primer. And pray :) . In 90% of cases whatever is causing stuck checkvalves will be dislodged and the primer will start pumping the redneck cocktail. Then try it with the air inlet and outlet open. If it stops pumping the jet valve is leaking. Pour some of the cocktail into the air passage, or even better, immerse the carb in the cocktail and keep pumping. Keep checking whether it can work out of the cocktail. When it does, move it into some fuel and pump, if it works, pump in some fresh fuel to flush it and try it on the saw.

 

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