smallplanes

My Feedback: (3)

I have a new shindaiwa weedeater power head. I got it from a friend of mine that owns a small engines shop. Its new only test run he bought a few of them cheap and he sold this one to me for $27. Well the name on the weedy is Shindaiwa Yardware 210 that is all thats on it. Can someone tell me what cc it is? I would also like to know what type of bearings are on the crank?
I'm going to get a EI to go on it. If someone has one they would like to sell email me with pic and price. I have two pics of the weedy one just like i got it and one with it ready for ignition.
Let me know something.


Thanks
Ivan

smallplanes

My Feedback: (3)

Ok i know that its a 21.2cc . Does anyone know what would be a good prop? I want to put this on a super stick 60 can it be done? Motor weight 2 lbs 5 ozs with out prop hub and EI. How do this motors do as conversion engines?


Thanks
smallplanes

J-3

I have an Echo 21.2cc on a blower I bought years ago. Probably has an hour or two run time on it. I would be interested if any has converted one of these too.
Thanks..Brian

smallplanes

My Feedback: (3)

I think they might be the same motor. But i'm not sure. I still need to know what prop i should start with.


Thanks
smallplanes

w8ye

My Feedback: (16)

Start with a 16-8. Your goal is to have a static rpm of 7-8000.

Enjoy

Jim

mikenlapaz

The pictured case is different from an Echo 21.2cc. I think a different parent engine company.


w8ye: "Your goal is to have a static rpm of 7-8000"
I currently have 77-7900 on the Echo 21 Zinger 16-6 . (Glo-Bee and to much prop wash on atmosphere side of inverted carb) Is it a point of diminishing returns to go for more rpm with smaller pitch? Its rated WOT is much higher. 9500-11000

A light weight muffler source. Check out Mouser Electronics part # 546-1455C801 $ 9.84 Somewhere on their site is neat structral drawing which impressed me.
A bit of drilling and some steel brake line for compression posts.

w8ye

My Feedback: (16)

Mike

The 16-6 may be the ticket? I've only seen the motors complete and disassembled and I was going by the porting. I've never been around a converted one. It's more of a 8,000 rpm motor than a 7,000 like the Homelite weedie. I doubt if you'd be wanted to run it above 9000? Just guessing?

Jim

oslim

To mikenlapaz: Aluminum electronics box for muffler is a clever idea. What do you use as starting outlet hole diameter(s)? Do you use baffle(s)?

smallplanes

My Feedback: (3)

So you guys think i should start with a 16-6 - 16-8 prop. Ok thanks. The carb on this motor is very restricted on the intake hole in the carb(.312 dia. on the outside .500 on motor side). Do you think if i bore the hole out to the same as the back side of the carb that it will give me more power? I know i will have to take the brass flap in the carb out to bore it. Let me know.


Thanks
smallplanes

mikenlapaz

oslim Thanks. I bought several to use on variety of Homie and Ryobis. A search of muffler sites indicated that the exterior dimensions were very similar. I used two holes 1/2" .197si each x 2 = .395 si Exhaust port is .48 x .78" or .3744 si NO restriction. No pipes. Longer endplate screw & JB Weld to secure them and seal. Alum tube would make nice light compression tubes but none on hand

smallplanes I'm using a Wallbro 167-A 11.11 venturi. You need an I.D. difference on interior of carb. Take a close look near the throttle butterfly and notice a number of small holes , they are fuel jets and rely on a 'venturi effect'

Does anyone have a current Walbro # for same size but without the primer bulb cover on pump side? Picking is slim in an area that has little use for small gas engines.

w8ye

My Feedback: (16)

Mike,

If are looking in junk boxes, The right Walbro will have a little number inside the venturi. The number you are looking for is a 28 or a 27. Look in your Walbro 167-1 carb and see if it has a 28 molded into it? A WT 499 normally doesn't have the pump.

Enjoy,

Jim

smallplanes

My Feedback: (3)

Hi mikenlapaz, Are you saying i need the outside on the venturi a little smaller than the motor side of the carb? Like 11.11 mm on outside and 12.7mm on motor side of carb? Will it give more power?


Thanks
smallplanes

mikenlapaz

smallplanes
Time for you to do some reading....this should get you started.

http://www.rcfaq.com/answers/engines...s.htm#Hop%20up
http://www.shark-racing.com/Ingles/T...hercarbing.htm
http://fly-imaa.org/imaa/hfarticles/...s/v7-4-16.html
http://testfly.0catch.com/
http://www.rcuniverse.com/forum/Walb...1726986/tm.htm
http://www.geocities.com/CapeCanaver...216/sonof.html

smallplanes

My Feedback: (3)

Thanks for those sites there very helpful. I have not read it all yet but i will.

Thanks for your time
smallplanes

tkg

My Feedback: (1)

WT-9 is an almost universal carb for weedies in the 25-30cc range.

mikenlapaz

tkg
WT-9 11.13 venturi The drawings show these with the primer bulb. Is there any special designation to order one without primer assembly?

I inverted a 167-A, lost fuel pressure and I'm still tinkering with getting it back to running as well as non-inverted. (Made a .005" shim material washer with a side flap, for engine side, to deflect some of prop wash...run this afternoon.)

Railridr

The WT-9 should not have a primer bulb. If you check [link=http://wem.walbro.com/walbro/family2.asp]Walbro's Website[/link], you will see that the diagram for the [link=http://wem.walbro.com/walbro/product2.asp?Series=WT&partnum=WT%2D9%2D1]WT-9[/link] shows a primer bulb, but the parts list for the carburetor does not list a primer bulb. If you go over the parts list carefully you will see that The WT-9 has a Choke indicated by item 18 on the parts list, and the WT-9 has and High and a low speed needle which is indicated by items 49 and 50 on the parts list. Also note that Item 62 on the list is the primer bulb, and there is not part number for it.

[link=http://www.rcuniverse.com/forum/m_2371019/anchors_2371019/mpage_1/key_11mm%252Ccarb/anchor/tm.htm#2371019]11mm carb list[/link]

mikenlapaz

Railridr: Thanks for the explanation of the "generic" drawings on their site. I have not spent much time chasing parts. Makes alot more sense.