I've read a ton of posts here and so far I've figured out that most everyone likes Homelite or Echos for converting.
My question is, the green weedeater brand line sold at walmart, are they worth converting?
Thanks DC

They are light on weight, but low on power. Some have hopped them up with porting, etc., and gotten at least reasonable power out of them.

AV8TOR

What about Stihl?
I have a FS26 and a FS48 weedeater motors.
Thanks

Heres a pic of my FS46 stihl.APC17x8 at 7400.Used engine i bought off a dealer.28cc[27.2cc actual].I also have the 26cc[25.9cc actual].This is suppose to be better because it comes from a pro version of weedie.Look up stihl in the search bar on the bottom right hand side of the page.Look in this forum only.Youll notice in the pic it can be rail mounted or mounted by the 3 lugs on back of engine.it comes this way stock.I did one of the weedwacker ones your talking about but i sold it as it wasnt worth it to me.Like aviator said,they will work on a high wing,or biplane as long as its light.

Take a look at Low,s for the newer models of leaf blowers. There are now getting very lite and more powerfull. The back-pack leaf blowers are really looking good. There is a race on between all brands to be the lightest and most powerfull. Note the 25cc engines are getting very good. That is a good thing for easy conversions. Best Regards Capt,n

I'm having a hard time understanding how everyone is making prop mounts for their engines.
Some say you have to buy them and alot of others are talking about making them theirselves
like its a piece of cake.
both the Stihls I have have shafts with very little thread on them.
So can somebody tell me how can this be so easy?
I'm missing something here.
And another thing, if you mill down the fins on your flywheel, why does it need rebalancing?
Thanks

Here are a few pics of the Stihl 48 and 36

Oddly enough the bigger number is on the smaller looking engine and
the smaller number is on the bigger looking one.

The bigger one on the right as you can tell has a clutch on it.
I left it on the crankshaft to keep the flywheel from coming off.
It looks more like an RC engine than the smaller one.
When you take the clutch off, it just has a few threads on the end where the clutch was and
then there is a metal tube or sleeve that slides off the shaft and butts up against the front of the
flywheel, sorta like a spacer.
I don't see anyway to put a prop hub on this motor, but then again this would be my first conversion.
Thanks

I forgot to ask,but how can you tell what size these are?
In CC I mean.
surely can't go by the marking on the trimmer, cause I know that little motor isn't 48 cc.
Thanks

Engine on the right is a 31cc ryobi long shaft.I have a hub set already made up.I wont be using it either.One on the left not quite sure,i need a little more light on the case and the other side of engine.Some of us rebalance our flywheels some dont.Usally there not that far off anyway that ive come across.You only need about 3/8ths of an inch of threads to hold the hub on.The hubs like ya mentioned that we say are easy to make is because some of us have lathes,drill presses,ect...The long shaft ryobi for instance just uses a spacer to slip over crankshaft,about 1 inch in diameter,then you put the prop on,then a washer,then the nut.
To figure out the ccs,use a popsicle stick or similier.Insert in muffler port and touch other wall,then bump cylinder and itll leave a mark.Now measure this in MMS and write it down.
Use other side of stick,insert in spark plug hole,then mark at TDC and BDC.then measure the distance in MMS.
Lets say for cylinder you measured 30mm.
Then for stroke you measured 28=====top dead center=====bottom dead center
You want 30mm squared,your equation will look like this.
15x15x3.14[pie rounded]=706.5
706.5x28 stroke=19.78
This means actual ccs are 19.7,but the piece of equipment will say 20ccs or the parts listing.
If ya want C.I.=19.7x.061=1.20
This engine would be close to a 120.basiclly.

Your calling the engine on the right a Ryobi?
It came off a Stihl weedeater. Thats odd.
What do you want for the hub setup?
Also, how am I suppose to mount the engine to the firewall?
The carb is in the back.
I'll try the popsicle trick and the math equations you mentioned.
Thanks

Hey,
I tried that popsicle stick formula thingy and came up with 29.04cc
So I guess your saying its a 31 are right on the money.
Now if I only knew how to put a prop hub on it.
Thanks

Heres a pic of the lond shaft like yours with a hub.The hub just slides on the shaft and butts up against the flywheel,then the prop sits on the hub,then the washer and then the nut holds evrything together.I also put a pic of the mount that i use.its a piece of aluminum channel and the 4 bolts on the back of engine that hold the black plastic reed case on hold the mount to back of engine.Ill send you a pm about the hub.It would be the nicer one with the bigger lip thats holding up the end of the crankshaft.The engine is one im finishing up.I turned down the fins so there round and it looks better.Im waiting on my igns to come in so i can finish it up then its going for sale.The pics arnt the best,batteries in camera are low and i put the items on a piece of pink foam.Put in ryobi 31 in the search bar at bottom right hand corner of page,search this forum only.Theres a lot of info with pics.Also go carprecission.com and check that out.Or jagengines.

Hey thanks, believe it or not, I was surfing carr and jag before I logged on here tonight.
I saw enough pics the I figured out that the long shaft engine is easier to convert with a prop hub
that gets held on with the original threaded part of the crank.
I saw your engine and the plastic on the back of yours is black.
I'm sure the plastic on the back of mine is white.
Will this make a difference?
The aluminum channel engine mount seems simple enough.
Do you drill out the back of your flywheels and then punch out the steel pins the
the starter thingys rotate on?
What do you do about a muffler?
Or do you run straight pipe?
I know you say my engine is a Ryobi and I don't doubt your word,
but just for the sake of saying it.
I looked and the block and flywheel have the word Stihl embossed into them.
I'm thinking Ryobi makes them for Stihl??
Will this make a difference if I go to convert it?
I really want this to work so I can put it on my Stinger 120.
Thanks