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#4535040 - 10/05/17 10:52 PM Weed Eater Featherlight Minimum & Maximum RPM
TurboDieselPoint Offline

Registered: 04/10/17
Posts: 12
Loc: Planet Earth
Hi All,

I have a "Weed Eater Featherlight" 25cc 2 cycle, much like the one in the link below, which I will be converting to run on compressed air for my controls project. Have a quick question for you all:

When it is running properly on gasoline, approximately how fast will the engine be running at idle and at full throttle?

Thank you so much!


Edited by TurboDieselPoint (10/05/17 10:52 PM)

#4535082 - 10/06/17 01:26 AM Re: Weed Eater Featherlight Minimum & Maximum RPM [Re: TurboDieselPoint]
Linctex Offline

Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I'm guessing 7,000-8,000 rpm?
Maybe more. I know when the string breaks off, the RPM's get really, really high.

You can get small handheld tachometers for pretty cheap.

Curious - - why compressed air?
How do you plan to lubricate it?
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

#4535087 - 10/06/17 01:38 AM Re: Weed Eater Featherlight Minimum & Maximum RPM [Re: TurboDieselPoint]
Shannow Online   content

Registered: 12/12/02
Posts: 39826
Loc: 'Stralia

Max spindle speed 10,000RPM, so 7-8 sounds right. manual

#4535097 - 10/06/17 02:46 AM Re: Weed Eater Featherlight Minimum & Maximum RPM [Re: TurboDieselPoint]
motor_oil_madman Offline

Registered: 11/29/09
Posts: 4838
Loc: Houston, Texas
Cool, how many psi will it take to blow the top end off. lol
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

#4535242 - 10/06/17 09:00 AM Re: Weed Eater Featherlight Minimum & Maximum RPM [Re: TurboDieselPoint]
boraticus Offline

Registered: 04/19/09
Posts: 2905
Loc: Canada
My Echo trimmers are set to run around 2500 rpm low speed and 7500ish at high speed with fresh strings. As mentioned above, speed will increase as the strings get shorter.