anyone help
im curious, is there a way to order a two ring 31cc ryobi string trimmer from harbor freight tools and get what you want?
or is it a roll of the dice kind of thing?no one i talk to either can ,or will help me ,but thats not all that unusual.
is there something i should know .
really confused fj5

With Harbor Frieght it's likely a roll of the dice.

More likely a new one than a factory remanufactured one?

I wouldn't worry too much about single or twin

They both run good. With a Frank Bowman ring the single can be pretty good

Enjoy,

Jim

thanks y8ye
ok if i put "bowman" rings on my 31cc ryobi how much of a performance gain should i expect?if a single ring motor with bowman rings is better wouldnt a double ring motor with bowman rings be twice as good?
can u provide contact info for frank bowman? i appreciate all the help
thanks fj5

I just sent my twin ring piston to Frank Bowman to have his rings installed. I did a search in the forums for -Bowman- & I read in more than one thread where they were getting at least 500 rpm's & some up to 800 more rpm's with Bowman rings than stock rings. Here is his contact info.

Frank Bowman
1211 N. Allen
Farmington, NM 87401
(505) 327-0696
[email protected]

thanks bjmjs
i sent the check for one a few days ago found his address in this forum ignition came yesterday cant wait to run it
how is your conversion going having any luck?
fj5

Haha funny thing is, I JUST bought a Ryobi week wacker, 31cc, for 10 bucks about an hour ago at a yard sale! Im in the midst of tearing it apart right now. This is my first gas engine, and my first conversion. Not to take the topic, but what should I do to convert this engine to RC? I need help on where to find parts and other things to make this engine work. Thanks

Colin C

predator
check with Peter Faith @ wacker engines.com he has good parts good prices and is very helpful
fj5

Hang in there...we have a lot of Ryobi converts out there somewhere......hey guys wake up!!!!

Captin, what do you no about Duropower engines. I see they have a 26cc for $50.00 and a 33cc for $70.00. Sounds like a good deal if they are any good.
Ken

boxcar: Where did you see this Duropower engine? Thanks Capt,n

Captin, go to their web. www.duropower.com
Ken

Hmmm, interesting. I love it when I see "not for sale in California". That's always a good sign.

They look like my Mitsubishi engine that I've yet to tear into. That 52cc for $79.00 looks especially interesting. Who's going to be the first to buy/try one?

AV8TOR

Will I am going to order the 33cc. Just got to no what we got here, the price is right. I have a stinger 120 that needs a engine.
Ken

"Let me no when you are going to land so I can empty the trash can"

Please let us know how it turns out!

Thanks
AV8TOR

For sure, when it comes in will let everyone no what we have to work with.
Ken

well everything went "kerflewie" today. my new ring showed up in the mail ,and low and behold it's to big for my piston .aparently my engine is a 28cc i didnt know that.
ok ,no big deal.i pull apart another one i have laying around polish the ports clean every thing up ,and the chrome is about half peeled off the cilynder.i guess i should have checked it out first. its now 2:30 pm (i started at 9:00 am) .
harbor freight at3:00 pm $63.00 later i have a new 31cc ryobi .
during disasembly im pleasantly supriesed to find a twin ring engine with not two ports , but four!... and no compresion relief slots! with the exception of my bowman ring ,not to shabby!
wow ,what a roller coaster ,im almost back to where i started maybe ill get to run it tomorow .
fj5

what should exhaust duration be . i measured about 135 degree's does that sound about right?
fj5

Do you know if there are any conversion packages for these engines or do you have to make the parts yourself? Thanks

f-15
check out wacker engines hes the supplier i use ,wacker engines. com .petes a good guy ,and will treat you right
super parts too!
pete has an all included package, parts and engine(ryobi) very reasonable look him up
fj5

well after my nightmarish day from h*ll yesterday things went good today .
it started fairly ,easy tuned ,easy and runs strong .idle is dependable at 1450 rpm's ,w.o.t.
7500 rpm's on the first tank of fuel .all on an 18 x 6 wood prop.
THATS WHAT I'M TALKING ABOUT!!!!!!!
wow ,this conversion stuff is kind of exciting.
to all who helped, thank you fj5

av8tor,

Did you notice the RPM for max power and max torque and did it seem logical? 6500/5000 RPM seem very low for a two-stroke engine. Wonder what the application was for the 52cc engine.

DP52T $80
Max power – 6500 RPM
Max torque – 5000 RPM
DP26T $50
Max power – 7500 RPM
Max torque – 7000 RPM
DP33T $70
Max power – 7500 RPM
Max torque – 5500 RPM

Bill

Bill,
that is there max-rpm not ours. I ordered the 33cc last week, will post some pic's when I get it down to bare bones. I hope it is a good engine,$70 is a good deal for a 33cc.
Ken