I have discovered the mower shop next door has several Stihl 27cc and 25cc engines just laying around... they use them for parts, but most of the parts are not taken from the engine just the trimmer.... Guy said he would sell me 10 of them for $100... Has anyone converted these engines for RC? The have rear exhaust porting, is this a problem? I have a feeling I'll need to fabricate the muffler, but that's not a problem... Is this a good deal? I don't see much info. on Stihl engines.

Buy one experiment with it. Let everyone know what you find out. I buy used Ryobi31 and Homie 25 for $14 US (150 peso). Great way to spend an afernoon. I now have operating 3 weedeaters. 3 blowers, and a hedge trimmer, plus 4 or 5 RC engines. Go for it.

Do they look like this one ? I have been looking for one of these, I like the design of the crankcase, mounting lugs, etc.
[link=http://www.geocities.com/mhammersmith/stihl/stihl.htm]http://www.geocities.com/mhammersmith/stihl/stihl.htm[/link]

That's them! I'm going to buy a few of them, and give them a try.
Thanks for the help.

the 27cc is stihl's cheapo engine for home gardeners, the 25cc is the one used in the pro tools and per their catalog has quite a bit more power.


dave

d
Does the 25 cc have the same style crankcase, with the mouting lugs, and "beams" ?

been ages since i've seen one so i'm not really sure about the mounting but i think it is similar what's found on all the japanese motors...a little bell housing that contains the pull starter. makes for a nice radial mount.

the echo 30cc saw engine has beam mounts and rear exhaust but the carb is mounted on the bottom of the crankcase. very light and would be nice on a big profile plane


dave

Anyone finished a conversion on one of these Stihl engines. I have a 25.4 that looks promising. I am hoping to put an electronic ignition on it.

I had a person PM me and is starting a 28cc (27.2 actual).conversion and was looking for a thread but couldnt find it so im continuing this one. heres mine already converted.i have no numbers as my tach broke but im ordering one on monday.heres a few stats to start:
52oz RTF with prop and IGN..ill have to take a new pic of the engine after i ran it on my stand.first pic doesnt have prop
ken lamberts muffler--1/2 tubes
17x8 APC prop-ran an 18x8 carbon fiber from TBM but will post rpms later.
ill show couple shots of mounts-3 point on rear or rail.
WA200 twin needle 11mm carb.
hub and sensor ring were made from stock flywheel and lathe
length from back of engine to back of prop 4-7/8 inches

Hi
Many thanks for your help and time to write and post photos.
When I find how to post photos of my mal to this forum I will post photos of Stihl conversion from Argentina.
See you later
Jose

Your welcome.didnt get a chance to order my tach today,hopefully tommorrow.If ya need anymore help post it here or just pm me like ya did before and ill post answers here or what ever works thats easier for ya.What problems are ya having with the pics.

my first attempt to post photo

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Hi
Photos not in order, sorry.
The first photo is the last.
Modifying exhaust, too much restricted, also take out baffle, less weight.
In this moment the engine is searching a new test stand, obviously.
Problems with needles, plastica caps, now the plastic caps are cut.
Trouble with transition, solution, plastic from syringe.
Slowly but sure, start from a new Stihl, in Argentina is one of the most expensive weedeaters, aprox. 250 U$S.
My friend is a beginner see my Poulan weedeater converted flying and see and believe, a fast conversion of a nonbeliever modeler .
Prop at first moment is 16 x 6, small but muffler and needles standard.
Many Thanks for your time.
My friend is from Rio Negro, apples production country, the test stand is from an apple container.
I will send more photos when have.
See you later
Jose

Hey: If that wooden crate starts moving forward....let up on the Gas!!!!! Capt,n

looks great.you did a very good job converting it it looks like.when i sent ya a pm i mentioned that im going to put mine in the 120 size edge 540 from texasrc.i stihl have to do my other 25.4 but ill put that in the stihl 25cc thread.but it will be a couple weeks a least.maybe ill get my tach ordered this week.