HOMELITE XL12 CHAINSAW. MODEL UT10490 SERIAL # 17802730
Here are free UT10490 Parts Diagrams you can print:
https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/green-machine/homelite/chain-saws/xl12-chain-saw-ut-10490
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 10540 chainsaw 35CC chainsaw won't start when hot
Go to: http://www.drystacked com for a 12 page article on Walbro carburetor theory and troubleshooting. Check particularly, the position of the gasket in the lower chamber. Check the spark plug for blue, snappy spark when the engine is hot. If ok, place a small amount of fuel mix in the cylinder and try for start. If it pops several times, look to the fuel system. Check the fuel filter, air filter, and muffler for plugging. Does the primer bulb fill with fuel after several pumps? Check the fuel lines for decay or other damage. When the engine is hot, try not using the choke, but set the fast idle. Hope some of this helps!
SOURCE: Chain Saw Motor will not start.
Yes it is very important i would recommend also putting in a new spark plug. Thanks for asking and I hope it helps
SOURCE: Need to know best way
Regarding the adjustment procedure you generally start your low and high mixture screws at one turn from seat, or slowly turn them in all the way until they bottom out and then back them out one full turn. You will adjust the high speed mixture screw at full throttle and get the median point between too rich (loads up) and too lean (dies out). You will want to do the same thing with the idle mixture screw, just adjust at idle rpm. You will also adjust the low idle mixture screw to give you a smooth transition from idle to throttle up. Once this is obtained, you adjust the third or idle speed screw low enough so the chain does not turn at idle rpm but high enough so the saw doesn't cut off. Hope this gets you going.
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