Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Babe Bee running Problem Cox_ba12





Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
September-2022
fredvon4's

Hot Tee Dee .049 featuring a Turbo Head and exhaust collector



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Babe Bee running Problem Empty

Babe Bee running Problem

Go down

Babe Bee running Problem Empty Babe Bee running Problem

Post  Ivanhoe Sun Jan 01, 2012 5:11 pm

Got another little problem for you experts!
I've just finished re-building yet another old Babe Bee, fitted the full overhaul kit, reed, reed retainer , fuel pipe, gaskets, etc. and put in a new needle (This was the Bee with the end of the old needle broken off, as my previous post)
I put it on the test stand and fired it up, started OK, ran for about 20 seconds, sounded perfectly normal, then just stopped. It then took me an age to get it to start again, when it did, it ran for 20 seconds, stopped, pig to start again.
It seems to start OK from cold, but once it stops it just doesn't want to start again, and why is it stopping after a short time? It doesn't sound like fuel starvation, or too much fuel, one second it's running, then it's not, engine note doesn't change. Crying or Very sad
Any ideas folks?

Wilf
Ivanhoe
Ivanhoe
Diamond Member
Diamond Member

Posts : 1752
Join date : 2011-09-30
Location : Northern Ireland

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  Mudhen Sun Jan 01, 2012 5:34 pm

.


Last edited by Mudhen on Tue Nov 09, 2021 8:56 am; edited 1 time in total
Mudhen
Mudhen
Gold Member
Gold Member

Posts : 486
Join date : 2011-09-19

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  nitroairplane Sun Jan 01, 2012 5:46 pm

I think you have poor piston cylinder fit.
Cold, compression is goodand it runs well but when it heats up t is poor so stops.
Then when hot it is hard to start until
It becomes cold and the fits tighter again.

This can be hard to feel when turning by hand but affects the engine a lot.
nitroairplane
nitroairplane
Top Poster
Top Poster

Posts : 6956
Join date : 2011-04-11
Location : London

http://modeldieselengines.forumstopic.com/

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  Admin Sun Jan 01, 2012 6:09 pm

I just got done fighting with a over abused 60s Babe Bee. Try a new glow head like Mud talked about earlier and also check the compression of the engine when it is hot like what Nitro said. I have had this issue before. Check the position of the pick-up tube, sometimes when you are assembling the engine, the tube can slip and move to a upper position.



Jacob
Admin
Admin
Administrator

Posts : 5954
Join date : 2010-07-27
Location : Roseville, Minnesota

http://sites.google.com/site/coxenginecollection/

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  Ivanhoe Sun Jan 01, 2012 6:48 pm

nitroairplane wrote:I think you have poor piston cylinder fit.
Cold, compression is goodand it runs well but when it heats up t is poor so stops.
Then when hot it is hard to start until
It becomes cold and the fits tighter again.

This can be hard to feel when turning by hand but affects the engine a lot.

Ah Ha! yes, this could just be the answer, I had to reset the piston due to excessive play, so I suppose it could be badly worn, I'll try a different head first, as others suggested, and if that doesn't fix the problem it looks like it's to look at only, because I don't want to fit a new, modern cylinder/piston
Ivanhoe
Ivanhoe
Diamond Member
Diamond Member

Posts : 1752
Join date : 2011-09-30
Location : Northern Ireland

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  Ivanhoe Sun Jan 01, 2012 6:51 pm

Admin wrote:I just got done fighting with a over abused 60s Babe Bee. Try a new glow head like Mud talked about earlier and also check the compression of the engine when it is hot like what Nitro said. I have had this issue before. Check the position of the pick-up tube, sometimes when you are assembling the engine, the tube can slip and move to a upper position.



Jacob

I've read about others having problems with the pickup tube moving, so that was the first thing I checked, as I said to Indra I'll try a new head also.
Ivanhoe
Ivanhoe
Diamond Member
Diamond Member

Posts : 1752
Join date : 2011-09-30
Location : Northern Ireland

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  GermanBeez Mon Jan 02, 2012 3:11 am

the head- did you check if it might had screwed itself loose after running?
the exact same thing happened to my BW once, because the head wasn't on there tight enough.
Beez
GermanBeez
GermanBeez
Platinum Member
Platinum Member

Posts : 1167
Join date : 2011-06-15
Location : Bavaria, Germany

Back to top Go down

Babe Bee running Problem Empty Re: Babe Bee running Problem

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum