Engine Conversions Discuss all aspects of engine conversions in this forum

Twist n Edge TE475Y 25cc....should I bother?

Reply

Old 03-09-2019, 08:13 PM
  #1  
kamlooper
Thread Starter
My Feedback: (1)
 
Join Date: Dec 2001
Location: Kamloops BC Canada
Posts: 205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Twist n Edge TE475Y 25cc....should I bother?

I picked this up for $0 today. With thoughts of making a conversion, but this one may not be a great candidate.
My main concern is this shaft off the flywheel. Its not solid with the crankshaft and is essentially a "nut" for the flywheel. I think the real proper way to make a prop hub is to have a piece machined to replace this, inside threads on one end to hold flywheel on and other end with a threaded shaft to fasten the prop to.
Would you pass on this and find a different donor engine? Or maybe have a better solution.
I have a small lathe and some fabrication skills but am no means a pro.
Thanks


kamlooper is offline  
Reply With Quote
Old 03-13-2019, 08:53 PM
  #2  
kamlooper
Thread Starter
My Feedback: (1)
 
Join Date: Dec 2001
Location: Kamloops BC Canada
Posts: 205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Made a less then perfect home made hub. 16x8 APC
4 lbs 4 oz as pictured. Total investment, $10 for prop.
It runs....

kamlooper is offline  
Reply With Quote
Old 03-14-2019, 03:18 PM
  #3  
Tidnab
My Feedback: (51)
 
Tidnab's Avatar
 
Join Date: Mar 2005
Location: Clearfield, PA
Posts: 1,065
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

I have one of those engines on a trimmer yet. I added a bigger carb(11.11 mm venturi ) and it really opened up. That was three years ago and it's still running. A guy on RC Groups converted one but with electronic ignition. There probably a few threads on RCG and here for that engine.https://www.rcgroups.com/forums/show...ane-idea/page2
Tidnab is offline  
Reply With Quote
Old 03-14-2019, 04:47 PM
  #4  
kamlooper
Thread Starter
My Feedback: (1)
 
Join Date: Dec 2001
Location: Kamloops BC Canada
Posts: 205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Good to know, I took it outside and opened it up and she had some nice revs. I think its safe to move forward with it, should come out at a reasonable weight with some trimming and a muffler diet.
The cdi kits are still available on hk, ordered one today, only $28! Ill need a tapered hub or cut down flywheel.
Im thinking of tapping these bosses for mounts, what do you think.

kamlooper is offline  
Reply With Quote
Old 03-15-2019, 12:52 PM
  #5  
Tidnab
My Feedback: (51)
 
Tidnab's Avatar
 
Join Date: Mar 2005
Location: Clearfield, PA
Posts: 1,065
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

On the pic it looks like it's back farther than the crankcase cover and if it is you could use standoffs to bring it out. McMaster Carr has them or you could make them https://www.mcmaster.com/standard-threaded-standoffs
Tidnab is offline  
Reply With Quote
Old 03-16-2019, 04:49 PM
  #6  
kamlooper
Thread Starter
My Feedback: (1)
 
Join Date: Dec 2001
Location: Kamloops BC Canada
Posts: 205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Yes Ill make my own mounts. Another thing, do you take off the carb return spring? This one has quite a bit of tension and would seem to be a heck of a load on a servo. I can see a return spring being good for safety reasons but at a much lower tension.
Thanks for your help...
kamlooper is offline  
Reply With Quote
Old 03-17-2019, 12:17 PM
  #7  
Tidnab
My Feedback: (51)
 
Tidnab's Avatar
 
Join Date: Mar 2005
Location: Clearfield, PA
Posts: 1,065
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Originally Posted by kamlooper View Post
Yes Ill make my own mounts. Another thing, do you take off the carb return spring? This one has quite a bit of tension and would seem to be a heck of a load on a servo. I can see a return spring being good for safety reasons but at a much lower tension.
Thanks for your help...
Here's a paragraph from the weedwacker conversion sticky.
It may be necessary to make a few changes to your carb. On the throttle shaft there is a return spring. Some people leave it alone and others do not like the servo having to pull against the spring. So these people unhook the tang of the spring from the hole in the throttle arm. Do not take the spring off the throttle shaft. The spring serves as a spacer to position the throttle arm in the center of the throttle bore. To remove the spring, you have to remove the butterfly and the retaining screw is likely to vibrate out and go through the engine once it is tampered with. With the spring removed completely, the butterfly wants to hang up in the carb.
Tidnab is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service