Question about McCulloch 16 In 4.5 Hp Electric Chainsaw With Carrying Case MCC4516FK

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Chainsaw diesels, and won't shut off unless choked.

Chainsaw won't shut off with ignition ground switch when hot. Have to choke it to stop it. What's with this dieseling? Thanks.

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Hot carbon deposits in the head and spark plug are usual dieseling culprits. If this saw has a long history with heavy oil/gas ratio, it will probably build these deposits. Pull the spark plug, and check for proper color which should be light to darker tan. Is the plug the proper one for this engine? Also, you should check the high-speed setting on the carburetor--(engine warm). High speed unloaded--should 4-stroke and with light-load (cutting wood) smooth out and fire evenly. Too-lean (CW) gives high revs and lots of heat. Hope that helps.

Posted on Jul 05, 2009

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Sounds like its a littel out of time

Posted on May 05, 2009

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1 Answer

M842 chainsaw wont start when hot


I suspect your warm start procedure is the fault, the manual is not correct IMO. Any choke on a warm engine causes flooding, try this, if no better post back or return it for warranty replacement.

Start Procedure
Cold:
  1. Ignition on/off to on.
  2. Set compression release – optional step even if saw is equipped with a compression release.
  3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4).
  4. Set compression release – optional step even if saw is equipped with a compression release.
  5. Push (open) choke pull starter until it starts. (usually first pull).
Warm:
  1. Ignition on/off to on.
  2. Set compression release – optional step even if saw is equipped with a compression release.
  3. Pull (close) choke, set fast idle (done when choke closed on some saws) – Do not pull with choke closed.
  4. Push (open) choke, pull starter until it starts. (usually first pull).
If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

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1 Answer

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Carb choke


yes ground and hot
youur hot wire needs to hook into ignition circuit so it is hot with key on

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