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get it here www.lilredbarn.net > PARTS > Chainsaws > Jonsered > Jonsered 2050 Turbo
or here www.ebay.com > ... > Jonsered Chainsaw Pistons&Cylinder Kits
I have no idea if you are bragging or complaining...
I WILL TELL YOU ... I have started many many a chain saw... and the chokes are nearly useless...
FIRST RULE: always use only fresh fuel...!!
Proper sequence for an ice cold saw (optimal adjustment)...
- squish the fuel bulb a couple of times
- set the choke
- couple of yanks until it coughs...
- completely release the choke and the next yank will get you running
If you have NO CHOKE... JUST leave the THROTTLE ALONE
until it coughs... Then start juicing the throttle...
It kinda sounds like there is an air leak on the intake grommet or gasket between the carb and and the cylinder. By closing the choke butterfly, you are limiting the amount of air entering the cylinder enough to keep it running, but not running correctly nor developing enough power because the air is entering downstream of the carb inlet.
Most LR 10 i saw were fitted with a Briggs and Stratton engine, there is normally an in line fuel filter from the tank to the carb, this may well be part blocked, so start by replacing this filter, make sure the fuel in the tank is fresh and clean, make an adjustment to the throttle cable, with the air filter removed you can see the choke flap, make sure the choke flap is closing fully as you move the throttle control on the dash board to the choke position, also make sure the choke opens fully in the full throttle position, there is a single screw which allows you to move the cable in or out to achive the correct opening and closing.as the filter is now off replace it with a new one, now try again.
There are two types of choke systems, the basic choke has a ball and spring in the carb body which locks the choke either in or out, the other type is connected to the half throttle position, once pulled out it stays out, however if you lift the throttle trigger it will go back in on its own, queation, are you holding the throttle trigger whilst trying to start it, if so this is why it will not stay out, if this is not the case, pull the choke out with a little more force, it may be just not coming out enought to lock.
Sounds like the choke is not closing. Perhaps it has become detached from the manual throttle.
A simple test you can perform is to let it cool for an hour or more, remove the air filter and cover the air intake with your hand (making your hand a manual choke). If it starts right up, then the real choke is the problem.
There are two valves that you can see from the top of the carb. The one closest to the air cleaner is the choke. The other one is the throttle. Both valves operate through 90 degrees of rotation. The choke should close all of the way with the lever in the start position and be open all of the way with the lever in any other position.
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