560xp "flat spot"

[THE88MAN]

anyone else? had mine a month or two now but only realistically started working it hard this week,8 tanks a day in large ash coppice.starts,runs and cuts like a dream,just has a very slightly annoying flat spot when revved from idle,keep it spinning its fine but just that fraction of a second is bugging me! guess it'll wear in? thanks

[Stubby]

anyone else? had mine a month or two now but only realistically started working it hard this week,8 tanks a day in large ash coppice.starts,runs and cuts like a dream,just has a very slightly annoying flat spot when revved from idle,keep it spinning its fine but just that fraction of a second is bugging me! guess it'll wear in? thanks

 

Mine used to do that way back when I first got it ( 2011 ) Had all the warenty bits done , new carb and a remap . Then pete modded it and its never done it since ...

[spudulike]

In real terms, it is giving too little fuel at low revs, this is the prime cause of that early to mid range bogging before the high speed circuit kicks in.

 

I know what you do to a carb to get rid of it but no idea on an autotune:confused1:

[THE88MAN]

In real terms, it is giving too little fuel at low revs, this is the prime cause of that early to mid range bogging before the high speed circuit kicks in.

 

I know what you do to a carb to get rid of it but no idea on an autotune:confused1:

 

ha ha,me too! strangely after about 11am (this week) when it feels a couple of degrees warmer it stops doing it fair weather saw maybe

[miker]

steve, what do you do to get rid of flat spot,have the same on one of my saws

[spudulike]

steve, what do you do to get rid of flat spot,have the same on one of my saws

 

The normal fix/adjustment is to open up the L screw by circa 1/8 - 1/4 turn. That should generlly fix it if it isn't a fuel system issue.

[miker]

thanks mate,by definition then you could create a flat spot by winding in L screw ?

[GardenKit]

TBH, if you have a workable 'flat spot' then your tuning is not far out. Its just very slightly weak. The merest tweak out on the L screw will probably do the trick. Turning it in will get it to the point where it just will not pick up.

[Chris Sheppard]

anyone else? had mine a month or two now but only realistically started working it hard this week,8 tanks a day in large ash coppice.starts,runs and cuts like a dream,just has a very slightly annoying flat spot when revved from idle,keep it spinning its fine but just that fraction of a second is bugging me! guess it'll wear in? thanks

 

My 550 was the same until I took the spark arrester mesh out - don't know if you've tried that but if not it can't do any harm.

[spudulike]

thanks mate,by definition then you could create a flat spot by winding in L screw ?

 

As Barrie, my twin, says YES. If you are used to running 346XPs, 345/350 Huskys, you will know the feeling when they are stone cold, they bog on whacking the throttle open until there is a little warmth in the engine.

 

In this case,it is normal!