Question to throttle blipping

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Barook

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Hi all.
I'm just wondering why when starting a chainsaw, you "blip" the throttle trigger to make the engine idle (so that the chain wont spin against the brake)? Sometimes there's no need to blip because the chainsaw is already in idle when it starts, but other times the saw immediately wants to run (and blipping the throttle trigger fixes this by changing it to idle?).

Just wanting to fully understand how this works, so any help is appreciated.

Thanks
 
Many saws have a starting position for the throttle trigger. This is generally set by depressing the throttle trigger, holding the run/kill switch in its third "starting" position, and releasing the throttle trigger. The throttle will then remain partially depressed, and the run/kill switch will remain in the starting position. Once the saw is started, blipping the throttle releases the catch, and the saw is able to return to low idle.
 
On many saws (All?) pulling out the choke, then pushing it back in before you start the saw, will set the high idle circuit, without choking the saw, this will let the saw start at high idle, blipping the throttle will return it to normal idle.


Doug :cheers:
 
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