Stihl 07 (non-S) scrapyard find today

I needed some short lengths of steel for the trailer project I'm working on right now, so I popped by the scrapyard to see what they had, and when I went to pay for what I wanted, this guy was waiting for me by the stairs up to the office:





I guess the one fella had set it aside earlier today for me. $5 took it home. I haven't pulled the muffler, and the recoil slips so I can't pull it over, but the piston does make a really strong compression pop at the top of the stroke when I turn the crank over with a wrench, so fingers are crossed...

What's there is mostly in fairly good shape, all things considered - not a whole lot of paint missing besides the handle and a couple corners which you would expect on a ~50-year-old saw, and some broken fins on the starter cover. Just needs a clutch cover, new muffler bottom half (though I'd like to find a whole new one because of some slight damage to the front of the top half), and the top handle is bent a bit but could be fixed with some effort. Going to see if my old friend has a replacement, in any case.

I've been wanting an 07 for a while now. At first I thought they were the ugly stepchild of the old Stihl lineup, but they've kinda grown on me. I think it would look good with the 22" hardnose bar w/ the old Stihl logo stamped into it that I pulled off the 08s when I converted it to a TS350.

Not a saw, but it's somewhat closely related - for another $5 I also came home with this thing:







293cc Fichtel & Sachs 2-stroke engine. It turns over and seems to make half-decent compression, but as you can see in the last photo, that piston isn't going to run anything worth stink. I figured the big Tilly carb on it was worth the $5 though, if nothing else; it might fit the old 299cc Rotax engine I got a while back. If only I could get the two of thm running in tandem on a big kart...

Man you have great luck at the scrap yard....:censored:


congrats.

Hey! Another scrap yard scrounger!
Glad I'm not the only one!
Nice score!
Hope ya get'em going!
If that ol' saw could talk!

I do like the looks of the 07 and 08's. Good save...Bob

Nice score,

And that would be a sweet kart motor!

Nice finds, Brad!! Man, I've missed your "scrap yard outings"....It's about time you picked up some more goodies!!

You should see all the stuff I've picked up lately, Dude!!....You'll have to make a trek north one day.

that's 71cc .. 293cc would be a real monster!!!

Brmorgan said:

293cc Fichtel & Sachs 2-stroke engine. It turns over and seems to make half-decent compression, but as you can see in the last photo, that piston isn't going to run anything worth stink. I figured the big Tilly carb on it was worth the $5 though, if nothing else; it might fit the old 299cc Rotax engine I got a while back. If only I could get the two of thm running in tandem on a big kart...

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Hmmmm, both engines are in bad shape but they come always handy for a later project.
The 07 is a Stihl relic that fits nice in everyone's collection, just my opinion of course.

The F&S engine is neat as well...just curious what it was used for in the past ?

I did some research and looks like it was used in snowmobils in the seventies.
it has a nice sound to it !!

http://www.youtube.com/watch?v=aRE3_zbWRaY

046 said:

that's 71cc .. 293cc would be a real monster!!!

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Pretty sure it's 293 - the piston is a good 3" diameter or more. It's about the same size in general as the Rotax I have. Can't imagine a 71cc engine being able to pull fuel through a carb that big either - it makes an HL look tiny.

046 said:

that's 71cc .. 293cc would be a real monster!!!

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that's definately a 293cc two stroke....!!! Hubraum = cc

The SA290 Sachs was one of the common snomobile engines around 1968-1970. With a Tillotsen HD carb, they made about 18 hp. The head could be milled and the jug ported to get lots more, but the cast-iron sleeve didn't expand anything like the aluminum piston did, and most people were unhappy with the result.

Wiseco used to catalog pistons in standard and several overbores, as well as 2 or 3 pop-up heights. This engine was originally designed as a stationary power unit running at 3-5000 rpm, producing 8-12 hp, and it was uncommon to find one that had lived more than maybe 100 hrs and still ran well...if at all.

Not a bad design, just not designed for the application. By the early 1970's snomobiles were no longer using stationary power unit designs and service life was getting better.

Basically sounds like a German version of the Austrian Rotax engine I have. Almost the same displacement, similar overall size, same horsepower rating give-or-take, same end uses, even similar appearance.

I agree, Belgian, those old sled engines have an awesome sound to them. New big two-stroke sleds do too, it's just different. All piped and tuned now, pushing well over 100HP on the big ones.

Need a stihl 07 crank

A little more on the 07...

The recoil was sticking when I tried to turn the saw over, so I pulled the starter cover off of the saw. BAD NEWS... I can grab the flywheel and it flops all over the place - the crank is busted on the FW side of the rod. No idea where I could get a crank for it - the old guy here I get parts from all the time says he knows he only has one 07 somewhere on his shelves of parts; we looked for half an hour today and couldn't find it. Said I can have it if we can ever find it though.

Other than that, I pulled the muffler off and the piston looks like brand new through there still. So that's encouraging anyway.

Brad....If it's the same as an 08s, I bet I've got one you can have. I've got the 08 IPL, but not the 07, so I can't tell for sure.

jockeydeuce said:

Brad....If it's the same as an 08s, I bet I've got one you can have. I've got the 08 IPL, but not the 07, so I can't tell for sure.

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Yeah, I had that same thought when I was up at my friend's shop looking for parts for it. We started tearing an old roached 08 apart, when I realized my new phone had internet on it, so I looked up Acres' site and the 07 has a 38mm stroke; the 08 is 34mm, I believe. And the S10 was different yet again, if I remember right.

The crank actually broke up inside the center bore of the flywheel; I have a feeling it might have been killed by an impact gun. Not quite sure what was going on though since the coil's mounting screws underneath were missing and the coil was flopping around loose.

Even though the stroke is different the cranks might be the same. The stoke is different because the rod is longer. If you find a flywheel for a points 08, I'm in need of one.

sefh3 said:

Even though the stroke is different the cranks might be the same. The stoke is different because the rod is longer. If you find a flywheel for a points 08, I'm in need of one.

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OK now, I don't profess to be an engine expert, but isn't the stroke determined by the amount of cam offset in the crank? A longer rod would just keep the piston farther away from the crank at all times, no?

Brmorgan said:

OK now, I don't profess to be an engine expert, but isn't the stroke determined by the amount of cam offset in the crank? A longer rod would just keep the piston farther away from the crank at all times, no?

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Yes, if there is only 2'' of throw on the crank, it doesn't matter if the con rod is 4 feet long, or 14 feet, the piston is still only going to move 2''.

daddy66 said:

Yes, if there is only 2'' of throw on the crank, it doesn't matter if the con rod is 4 feet long, or 14 feet, the piston is still only going to move 2''.

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:agree2:Yep, true dat!!!

That's too bad you can't use my 08s crank, Brad!