Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

K&B .45 (7.5) engine help

Reply

Old 04-09-2003, 12:15 PM
  #1  
jetsett
Thread Starter
My Feedback: (6)
 
Join Date: Mar 2002
Location: Guelph, ON, CANADA
Posts: 211
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default K&B .45 (7.5) engine help

I just received a K&B 7.5 (.45) 9100 D/F series engine from a fellow modeler. My question is , At top dead center, it feels as if there is a flat spot on the bearings (I know there isn't however), It just feels like it. Is this normal for this engine. It also does it at bottom dead center. Just wondering if this is normal. Is it the sleeve or the piston , or should I just inquire about returning it???
Thanks all
Don
jetsett is offline  
Reply With Quote
Old 04-09-2003, 03:17 PM
  #2  
ChuckAuger
Senior Member
My Feedback: (12)
 
Join Date: Dec 2001
Location: Pampa, TX
Posts: 5,133
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default K&B .45 (7.5) engine help

That's just the crank pin rocking back and forth in the rod. No worries.
ChuckAuger is offline  
Reply With Quote
Old 04-12-2003, 01:00 AM
  #3  
SAPropbuster
Senior Member
My Feedback: (5)
 
SAPropbuster's Avatar
 
Join Date: Mar 2002
Location: San Antonio, TX
Posts: 210
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default K&B .45 (7.5) engine help

You MIGHT have an 'egg-shaped' wristpin hole in the piston or conrod..... Might want to check it!
SAPropbuster 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