Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: 2manyhobbies on October 07, 2013, 07:28:55 pm
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Hi everyone, I am new to the forum... so hello from NC!
I recently bought a 3120xp project primer bulb model - I bought it as a non-running saw but got it up and running quick enough. Both the piston/cylinder and carburetor were changed by the previous owner about 6 or 7 years ago and the saw has not been run since then. Looking in the cylinder it matched his description. The problem is that the original Walbro WG2 was replaced by a WG8 (WG 8 620) which is a choke carb with no "high" adjustment. From what I have found this is for a later model EPA Husky. My other issue is that I cannot get it to idle down under ~2,800 - 2,900 RPM. Any suggestions?
I would like to find an original carb for the saw so that I can keep using the primer bulb (which I will need too.) Anyone here have one for sale, or know where I can get one?
If I cant find a carb with high adjustment how do I make sure that the high adjustment (that I dont have) is set correctly? In the past I have been playing around with the big Homelite C series saws (C-51, C-72, and a C-9) which have fully adjustable carbs.
Any help you guys can give me would be appreciated. - Brad
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The WG2 and primer bulb will be pretty tuff to find.
You can have a H side put in for about $25-$35
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>>My other issue is that I cannot get it to idle down under ~2,800 - 2,900 RPM. Any suggestions?<<
By opening the low side carb jet you will slow it down.
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Thanks for the quick replies! Who is it that is modifying the carbs? Or is there an instruction on doing it? I do have a machine shop at my disposal. One of my hobbies is building model hit n miss engines.
Is it normal for a carb with only a low adjustment to be running at 2.5 to 3 revolutions off from the seat? Does the 3120 ignition have an electronic rpm limiter?
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Terry Landrum would be the most likely to do it for you. Username tlandrum here.
The other 2 I know are racesaw builders and stay busy with other stuff.
You could probably do it yourself easily. But for 25-35 I just say here you go. Being I have no skills like that.
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I had a rev limited 3120 by coil. Threads here somewhere. Type 3120 in search. Bunch of info.
Had no H side carb on a stocker and cant remember. Sure you dont have a air leak?
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Well... You hit the nail on the head, I have a craccked intake plenum.
Brad
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Nice find. Just sounded like air leak to me. Thanks for letting us know.
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Hamish posted this info and felt it needed saved before lost.
You can adapt 530038874 to work. Its the older style primer bulb found on the Mondo series of trimmers.