Notices
O.S. Engines Support Ask Bill Baxter your questions about O.S. Engines.

Noise?

Old 01-01-2015, 03:14 PM
  #1  
binns aero
Thread Starter
 
binns aero's Avatar
 
Join Date: May 2014
Location: west milford nj
Posts: 140
Likes: 0
Received 1 Like on 1 Post
Default Noise?

Hey Bill, Happy New Year, have a older 52-4C hand me down, it was gumed up,pulled back plate and plug,cam cover and vc. Soaked in trans oil for a week, All loose now,cleaned it out and lightly oiled it. Comp. feels good fueled it up with Gloplugboy 24% Nitro,17% Castor,59%Meth.,flip,flip,flip and it started,very cold here,so i let it idle for a while,at half throt. there is a rude snappin noise. I'm swinging a 12x5 wood zinger. To much prop?,to much nitro?,detonation? Any thoughts?
Old 01-02-2015, 07:14 AM
  #2  
Bax
My Feedback: (11)
 
Join Date: Apr 2002
Location: Monticello, IL
Posts: 19,483
Likes: 0
Received 6 Likes on 5 Posts
Default

You have too much nitro in the fuel. It will run best with about 10%-15% nitro in the fuel. The noise you are hearing is likely detonation. When the engine is set up correctly, you will want it to run in the high-9,000's at full throttle on the ground when leaned to just rich of peak RPM.
Old 01-02-2015, 05:28 PM
  #3  
binns aero
Thread Starter
 
binns aero's Avatar
 
Join Date: May 2014
Location: west milford nj
Posts: 140
Likes: 0
Received 1 Like on 1 Post
Default

Hey Bill, Thanks alot! Been an auto tech for years, I guess thats what detonation sounds like with valves only a few mm's in diam. Thought I screwed the pooch. But like we say at work,"It ran when it got here", thanks again!
Old 01-02-2015, 05:59 PM
  #4  
binns aero
Thread Starter
 
binns aero's Avatar
 
Join Date: May 2014
Location: west milford nj
Posts: 140
Likes: 0
Received 1 Like on 1 Post
Default

Love those old ones! 15 years or so,stuck solid.Now in my Mambo.
Attached Thumbnails Click image for larger version

Name:	DSCN1131.JPG
Views:	76
Size:	1.18 MB
ID:	2059983  

Last edited by binns aero; 01-02-2015 at 06:06 PM. Reason: attached thumbnails picture
Old 01-21-2015, 06:53 AM
  #5  
Bax
My Feedback: (11)
 
Join Date: Apr 2002
Location: Monticello, IL
Posts: 19,483
Likes: 0
Received 6 Likes on 5 Posts
Default

Some of those older engines were of very high quality and will seem to last forever when properly-run and taken care of.

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 - Manage Preferences - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.