Need some help with this weed eater

[thenervemann]

these links are pictures of my weedeater

http://www.flickr.com/photos/31994961@N07/3032320591/in/photostream/

http://www.flickr.com/photos/31994961@N07/3032322383/

Okay how would i mount a centrifugal clutch on this?

there is an alternator in the way..or is that how it always is.

it is a 1/2 in diameter shaft btw.

 

[t0x1k]

Dont think its possible.

 

[Russ2251]

Problem 1
Centrifugal clutches with ½ bore next to impossible to come by. I've seen them, albeit rarely, on Ebay.
Problem 2
Shaft is hollow. Not designed to handle the kind of load that will be placed on it and are easily snapped.
Problem 3
Assuming you are successful in converting this to power something...how will you start it?

there is an alternator in the way..or is that how it always is.

That is CDI or capacitive discharge ignition.
Problem 4 (?)
Is pto rotation correct? Should be counter clockwise as pictured.

 

[thenervemann]

Crap!

 

[Russ2251]

Would be more cost effective to get a good 'usable' engine off of Ebay. I got a garage full of 'em. Some for as little as $35 delivered.

 

[jr dragster T]

Russ look at the direction that the starter pawls's and teeth are. Motor rotate's counter-clockwise.

 

[Russ2251]

Yup. Still can't use it. Would be easier to convert your L-B.

 

[motor_head]

yes you can do it.
for driving a clutch you take a rod of 5/8 or 3/4 diameter and grind down one end untill it is a square of the right size then just tack weld the clutch to the shaft don't forget a way to hold the shaft in here's a good video http://www.youtube.com/watch?v=uruaRsCHvk4

 

[Kaptain Krunch]

Motor Head, that engine came stock with a clutch, the weed eater he has does not. I have two of the ones he has sitting in a box in my workshop, and i can tell you there good for nothing, there half crank and very poorly made with nearly no power. Some weed eaters do come with clutches, there still pretty wimpy. I have a poulan weed eater, and a poulan chainsaw same size same year. The chainsaw is much better made although there both junk. So if you ever plan on using a small yard tool engine to power something, i suggest a chainsaw, they generally have more balls than a weed wacker or leaf blower.

 

[THE HUNTER]

i have an old 26.2cc Craftsman Weed Whacker that I'm not using (i like to call them "Italian gardeners") cause we just got a good Stihl. (thing is awesome!)
but i was thinking of putting the old Craftsman on a scooter. if it doesn't go faster than 15mph, that would be totally fine.. you guys think it would work? it does have a little torque to it.
if not, i can still use it to trim grass i guess lol

 

[motor_head]

yeah i know his has a clutch i just thought you could use a belt clutch like this

 

[modelengineer]

The trouble with a belt clutch like that is it puts ALOT of side loading on the engine crank. This would definitely snap it.

The way I've seen it done successfully is to use an oldham coupling to drive a much thicker shaft with bearings on either end. Then you could do that belt clutch idea from that larger shaft, but belts suck up a lot of power. It would be better to direct drive it with a chain and no clutch, it is easy to push start a scooter since you'd probably have to do that anyway with a clutch to avoid burning it out.

 

[mike75925]

partsforscooters.com, these lil pocket bikes have a two shoe clutch that goes through a reduction box. i've heard that in modifying the breather assm. you can get 60mph out of em on their original setup (pocket bike)

 

[Kaptain Krunch]

This is an old thread, and im sure in the last 7 months he has figured it out or given up.

 

[gman]

http://www.youtube.com/watch?v=YjOV...rls bicycle gas powered electric burnout mini

mabey this helps he sells instuctions