Husqvarna 445 manual - Garden

Husqvarna Operator?s manual Chainsaw 445
the carb is bad.
a tech cleans it kits it or replaces it.
same answer from 1920 to 1988 cars when EFI
but yours is 100 year off carbs,
we dismantle the carb and clear every inch in carb cleaner
all air paths tiny and all fuel path jets.
some carbs can defy cleaning if carb is too small like silly tiny string timers, (pain) with hair sized jets.
i did my STIHL chainsaw all the time. cleaned, even every year, if not drained properly at end of seasons./

fixit youself or take it a shop. 2 choices
there is a parts list on all saws.
using the real name finds real books best
46cc engine, tiny that is.

https://husqvarna.custhelp.com/app/answers/detail/a_id/106/~/documentation---operators-and-illustrated-parts-manual-445-or-445e-series

deep there somewhere is manual and parts list
parts list will show true carb p/n #
so one can be found.

You seem to have changed everything, are you sure this is not an ignition unit issue? i have to confess the unit is not the best quality, i think the next move is to replace it.

http://www.husqvarna.com/us/support/manuals-downloads/

remove the top cover and see if the pins are broken from the sides of the lever

Verify you have oil in the oil fill tank. Try cleaning inside the drive sprocket cover. Release the chain tension and carefully dislodge the bar and chain assembly. Clean sawdust and debris from behind and inside the housing and behind the bar. Use a wisker wire to clean the through ports and channels on bar( these ports are the path that the oil travels to the drag groove that the drive links on the chain uses to pull the oil to the tip of the bar).
Please refer to this link below for your saw maintenance-
http://www.chainsawsdirect.com/manuals/HUSQ_445_MAN2.pdf

If this does not correct the problem contact Husqvarna customer service or a local service repair.

No. That particular machine never needs oiling. That is one of the great things about a Husqvarna Vik sewing machine.

Engine speeding up on idle is normally due to an air leak, check the carb securing screws are tight, if you have a leaking crank seal it will be a shop repair.

There is no externally adjustable oiler on a 445. From your manual:
"If the chain lubrication system is still not working after
carrying out the above checks and associated measures
you should contact your servicing dealer."
HusqvarnaUSA.com
http://www.husqvarna.com/us/homeowner/support/download-manuals/
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – for use with IPL
06 1500198
06 = year produced – 2006 (single digit before 2000)
15 = week produced - March
00198 = 198th unit Husky produced that week

make sure the chain brake is off. Then undo the two retaining bolts and take the cover off.

Try not giving any throttle when first starting. The newer trimmers are this way many times. (Maybe the newer chainsaws are this way now.)You prime the carburetor, set the choke and pull, but don't throttle until it runs for 10 or 15 seconds.

Jim