Quadra 35 won't idle? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 02-27-2004, 08:15 PM   #1
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Quadra 35 won't idle?

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Hey everybody. I ran up my converted chainsaw motor tonight (which is identical to a Quadra 35) however the engine would not idle. It would barely run at a very fast idle but it would not idle as low as it should. I changed the plug and it made no difference. I played with the high and low speed needles at every seting possible and it helped however it did not cure the problem. It is running a Zinger 18 x 6-14 and the fuel tank was setting 2 feet above the carburetor!. When the engine was warm it would not start unless the the engine was turning over (with an electric starter) and my finger was place over the carburetor to give it some choke. This procedure was repeated several times and in every case the engine would not start unless my finger was over the carb. Once the engine started it ran great at high speed and midthrottle however as soon as the throttle was brought back down to idle it would die. Could it be that i need a new carburetor kit? Any suggestions would be greatly appreciated.
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Old 02-27-2004, 08:27 PM   #2
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I just had simular trouble with my poulan. It turned out to be a dirty carb, you have to be absolutely sure that all the passages are clean and free of old gas goop. You should be able to clean er up yourself, a kit shouldn't be neccessary unless you rip a gasket taking the carb apart. Just take the carb off the engine remove both ends and start blasting with carb cleaner, make sure the little screen under the pumping diaphram is real clean too. Good luck to ya.
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Old 02-27-2004, 10:38 PM   #3
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Check for air leaks around the carb gaskets as well.

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Old 02-28-2004, 06:26 AM   #4
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Check the crank seals as well
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Old 02-28-2004, 07:46 AM   #5
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If you say you have to choke it when it's hot, sounds like a seal leak. When the engine is hot, the seals get soft and suck air in easily when they are worn. Also if it's wet around the flange where the bottom of the crankcase bolts on, it needs to be resealed. Take a seal to a bearing supplier. They should be able to duplicate it. Liquid gasket maker should be available there too, for the crankcase. Hope this helps.
PS. If it's what I think it is the Quadra seals should work.
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Old 02-28-2004, 08:03 AM   #6
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Does it have pumped carb on it. it could also be a week diapharm in the carb
What do you mean , I can land upside down
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