Throttle assembly 46cc homelite chainsaw - Homelite Garden

SOURCE: chainsaw carburetion

Had a similar sounding problem with my stihl MS 250. After two years of heavy and frequent use (with minimal maintenance) it ran perfectly but after three years of little use with no maintenance it began to die if the revs were allowed to drop, ie it wouldn't idle. I hadn't been draining the tank when not in use so assumed a carb gunk problem. Can also be caused by an oily mix or old fuel.

Today I removed the old fuel and fuel filter and sprayed the tank and up the fuel line with carb cleaner. Then I removed the spark plug and filled the chamber with carb cleaner (use a straw to direct), I removed the air filter and sprayed carb cleaner in here too. I gently pulled the starter cord a few times to spread the carb cleaner. I left it for 1/2 hour while I had lunch.

I then rinsed out the fuel tank with fresh fuel, renewed the air filter, spark plug, fuel filter and fuel. I checked the H and L screws were in the right place (they were), before pulling on the starter a few times to prime / flood the chamber. I then removed the spark plug for 5 mins and had a cup of tea while the flooded chamber resolved / evaporated, then fired her up. It worked well all afternoon.

No need for any tricky or delicate stuff if you give this a go first is my advice. Cost only of spark plug, air and fuel filters, fresh 2" mix and a can of carb cleaner. Took less than an hour excluding interruptions. Saved a potentially expensive trip to the shop where I'd have been billed for these parts as a routine matter.

SOURCE: Poulan chainsaw 46cc 20" chain

You normally have 3 screws - idle speed - slow running and fast running.
First take care as if it runs faster than idle speed that chain will be whipping around also.

Second you have to determine what is the problem. Is it faulty at low speeds or high speeds ? or won't it idle.
If it has turn stops fitted to the screws you only have a small adjustments either way.

If it won't idle, try turning in the idle screw a half turn - until the chain just starts to move slowly.
If its dying at slow speeds, get is going and slow turn the slow screw out until it starts to run a bit rough then turn it back in to the point where its running smoothly.

Bad fast speed can be caused by simple things such as a blocked muffler ( insects too - I had one blocked off by a mudnest wasp) - otherwise get it running at full and adjust the fast screw as per the slow one - out till its rough then back in slowly until its smooth.

Suggest before all this tho that you get it running with the cover off the carby and then give it a good squirt of carby cleaner first - it may just clear out any 'poop' thats there.

(Have faith even tho I have a Poulan with a carb that refuses to run on anything but carby cleaner. I have pulled it apart a few times and renewed all the perishable bits buts its a real pig)

SOURCE: homelite cs3314 chainsaw

Here is a link to get you your parts list. Make sure you have your UT#

http://odref.com/homelite/chainsaw/index.html

SOURCE: homelite runs wide open all the time

intake boot under carb is probably bad, mine did the same thing and this was the problem. about a 6 or 7 dollar fix

SOURCE: Not running at full throttle

close to the carb you will find two tiny screws. They are labeled H and L. L sets the idle speed. H sets the max RPM. Hold the throttle wide open and turn the H screw. When you find the very top end, back it down some or it will be running too lean. That would make it run hot, and provides less lubrication. Could result in engine failure if you run it too lean.