Which Engine is this???
 

Could someone help me Identifying which engine Brand (And size if possible) is this.

I receive it from a second hand plane I buy.

It has printed on the wheel its made in the USA.

In advance thank you very much

Best Regards
VÃ*ctor.

RE: Which Engine is this???
 

It looks like a old Ryobi gas engine conversion from when Ryobi was still making engines in the USA.  It looks larger than the 35cc (1.9 cu in) Ryobi gas engine conversions that were made under the Evra brand label.  But the steel prop driver looks the same as those that are found on the Evra engines though. The flywheel is quite similar too, but the extra stuff was removed or machined off on the Evra engines.

RE: Which Engine is this???
 

its a two stroke.

did I win the prize?

RE: Which Engine is this???
 

It might be an EVRA but:

All the EVRA´s I have seen have the exhaust and the carb in the back and this one have side exhaust and carb.

I think its not and EVRA.

Any other thoughts....maybe an US Engine?

RE: Which Engine is this???
 

poulan

RE: Which Engine is this???
 

I agree, probably a Poulan.

RE: Which Engine is this???
 

Just checked some pics and you´re right its a POULAN

Any Idea on how to know which size it is? .... I guess its arround a 42 or a 46cc.

Could anyone share the total weight of your Converted Poulans 42cc or 46cc and with which prop are you using on them (and RPM´s to expect)

Im happy, I think I can get a good size stik type fun Sunday plane for this engine or even a Scale Warbird that I have laying arround.

Thank you very much.
VÃ*ctor.

RE: Which Engine is this???
 

I believe it might be a 42cc engine. The 46cc Poulan engines had a round, spigot type carb mount.

It would probably do well with a 20 x 8 prop or equivalent. The engine is a bit heavy, but runs well. I had one on an 80" wingspan Giant Stik several years ago and it flew quite well.

To check displacement, measure the bore and full stroke. Then use the formula (bore x bore) x stroke x .7854 to determine displacement. If you measure in millimeters, divide the result by 1000 to get cc's.

If you're careful, you can measure the piston stroke by going down through the spark plug hole. You can roughly measure the bore by sticking a pencil in through the exhaust port and against the far cylinder wall, and rotating the crank until the piston makes a mark by pushing the pencil up against the top of the exhaust port. That gives you the two measurements you need; the formula will give you the displacement. It's rough, but it will get you close, and you don't have to disassemble the engine to get the displacement.

AV8TOR

RE: Which Engine is this???
 

it could be a 33-42cc you will need to check the bore or track the casting #, they make great plane engines.

RE: Which Engine is this???
 

Thanks a lot Ken and av8tor1977

Where can I track the casting #?

RE: Which Engine is this???
 

Looks like it might be a 33cc, though we won't ever be sure until you measure it. Here's some info I found for that casting number:

http://www.powermowersales.com/pages...2f0625230005~1

Funny, I was thinking if it wasn't a Poulan that it probably was a Homelite.... I think I have one like it in my stack of engines, but I've been too sick to go out and search for it in the shop.

Note that the above info doesn't guarantee that it is a 33cc, because I believe that crankcase bottom with that casting number will fit more than one engine. You need to go ahead and measure your engine. But in any case, it will make a good airplane engine. The larger engines, found in backpack leaf blowers, chain saws, etc. have better ports, better port timing, better carb sizing, and considerably more power than the weedeater and small blower engines. You'll like it for sure, whatever size it turns out to be.

AV8TOR

RE: Which Engine is this???
 

Just for reference, I found a pic of my Homelite 45cc. Not identical but very similar.

AV8TOR

RE: Which Engine is this???
 

Following the cast number, it now seems it might be a HOMELITE 33cc and not a Poulan.

I found some pics of converted Homelites 33cc and the do look very much alike.

How could you Know which brand is it?

RE: Which Engine is this???
 

Yeah, it seems to be a 33cc homelite probably from a ranger model chainsaw.

RE: Which Engine is this???
 

Probably not as big as you hoped, but it is a very good engine nonetheless. You'll like it. It would probably do well with an 18 x 8 prop depending on what type of flying you do and what plane it will be put in.

AV8TOR