ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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]

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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"

RE: ryobi engine conversion
 

Please let us know how it turns out!

Thanks
AV8TOR

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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

RE: ryobi engine conversion
 

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