Gas Engines Questions or comments about gas engines can be posted here

Zenoah G-23 Prop Hub

Reply
Old 09-26-2010, 05:22 PM
  #1
GSAV8R
Thread Starter
 
Join Date: Dec 2001
Location: Stanardsville, Virginia
Posts: 63
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Zenoah G-23 Prop Hub

I need advice on how to change the prop hub on a Zenoah G-23 gasoline engine. I have the new hub and stud bolt along with a new prop nut and washer. I know the old one should unscrew from the crankshaft, but am not sure how to block the piston from turning. Any advice will be appreciated. Thanks.
GSAV8R is offline  
Reply With Quote
Old 09-26-2010, 05:34 PM
  #2
Woody218
 
Woody218's Avatar
 
Join Date: Mar 2002
Location: Bismarck, ND
Posts: 751
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah G-23 Prop Hub

Unscrew the spark plug and thread a couple feet of cotton rope down into the cylinder. Make sure you run enough down into the cylinder to prevent the engine from turning over when it comes up on TDC. This will faciltate the unscrewing of the prop hub, and will also work when you screw the new one back on.

When done, pull the rope back out, screw the plug back in, and go fly!
Woody218 is offline  
Reply With Quote
Old 09-26-2010, 05:42 PM
  #3
GSAV8R
Thread Starter
 
Join Date: Dec 2001
Location: Stanardsville, Virginia
Posts: 63
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah G-23 Prop Hub


Quote:
ORIGINAL: Woody218-RCU

Unscrew the spark plug and thread a couple feet of cotton rope down into the cylinder. Make sure you run enough down into the cylinder to prevent the engine from turning over when it comes up on TDC. This will faciltate the unscrewing of the prop hub, and will also work when you screw the new one back on.

When done, pull the rope back out, screw the plug back in, and go fly!
Thank you very much! It can't get much simpler than that. As always, you can count on your fellow modelers to help out when needed. What a great hobby!
GSAV8R is offline  
Reply With Quote
Old 09-29-2010, 09:24 AM
  #4
spaceworm
 
Join Date: Mar 2009
Location: Guilford, CT
Posts: 3,931
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah G-23 Prop Hub

I have used a motorcycle piston stop/timing tool for this purpose, but the rope trick is safer. Make sure you leave a tail of the rope sticking out of the plug hole so you can get it out of the bore after the hub replace. The rope trick can also be used on four stroke engines to hold the valves against the seats while removing the keepers to replace seals or valve springs.

Regards,

Richard
spaceworm is offline  
Reply With Quote
Old 10-17-2010, 10:17 PM
  #5
fhm555
 
fhm555's Avatar
 
Join Date: Feb 2007
Location: Pinson, AL
Posts: 77
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah G-23 Prop Hub

Would a strap wrench work?

http://www.craftsman.com/shc/s/p_101...5570000P?mv=rr
fhm555 is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

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



All times are GMT -8. The time now is 12:59 AM.