Minimum bar size

[tree_beard]

Carb settings limit the revs not the load on the engine dictated by the bar length.

 

true enough, but a carbs setting is specific to what bar and chain combo it was tuned to...

a saw tuned to perfection with a 36" bar will be revving faster if its then setup with a 15" bar (as the saw is fighting less friction and mass).

 

 

check your saws with a tach if changing the bar length radically... heck, check the tune of your saws regularly anyway, plug colour at the very least... they'll thank you for it

[TimberCutterDartmoor]

Yes I didn't describe it clearly. The saw is rpm tuned with a bar and chain fitted thus remove the latter and it will turn faster than the manufacturer recommended maximum rpm. For instance, take a tacho and hold it over the top cover of say my 036 fitted with 16" bar. Should "4-stroke" slightly at 13,500 rpm and be set there. I have never retuned the saw for different bar lengths tho perhaps one should...

[treefeller]

true enough, but a carbs setting is specific to what bar and chain combo it was tuned to...

a saw tuned to perfection with a 36" bar will be revving faster if its then setup with a 15" bar (as the saw is fighting less friction and mass).

 

 

check your saws with a tach if changing the bar length radically... heck, check the tune of your saws regularly anyway, plug colour at the very least... they'll thank you for it

 

who sells tachoes for saws and are some better than others? any ideas of prices i would expect to pay.

[Charlieh]

i use a stihl EDT7 tacho as it will do most of my kit including mowers etc, i think it was about £100 maybe a bit more 2yrs ago when i got it

[treefeller]

many thanks for that, shall phone local dealer today.

[bob]

would changing a big saw like an 088 to a small bar under stihls recomended cause us any issues re PPE should an accident happen???????????