Go Back  RCU Forums > RC Airplanes > Questions and Answers
Reload this Page >

Magnum 4 stroke repair

Community
Search
Notices
Questions and Answers If you have general RC questions or answers discuss it here.

Magnum 4 stroke repair

Thread Tools
 
Search this Thread
 
Old 04-08-2008, 09:35 PM
  #1  
Mode One
Senior Member
Thread Starter
 
Join Date: May 2005
Location: Park Rapids, MN
Posts: 2,989
Likes: 0
Received 0 Likes on 0 Posts
Default Magnum 4 stroke repair

Can anyone put me intouch with someone who can repair or has replacement bearings for a 1.20 Magnum four stroke engine. The bearings may be shot in my 1.20 and it might need repair. Thanks for your help.
Old 04-08-2008, 09:46 PM
  #2  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 8 Likes on 8 Posts
Default RE: Magnum 4 stroke repair

This place is great:

http://www.bocabearings.com/
Old 04-08-2008, 09:54 PM
  #3  
Mode One
Senior Member
Thread Starter
 
Join Date: May 2005
Location: Park Rapids, MN
Posts: 2,989
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Magnum 4 stroke repair

If I buy replacements, how hard is it to get the old ones out and replace them with the new ones. I've never gotten this deep into tear down of a 4 stroke. I've had them completely apart except for removal of the bearings.
Old 04-08-2008, 09:56 PM
  #4  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 8 Likes on 8 Posts
Default RE: Magnum 4 stroke repair

IT's not hard at all Mark, use a wooden dowel to tap them in and out with
Old 04-08-2008, 10:03 PM
  #5  
Mode One
Senior Member
Thread Starter
 
Join Date: May 2005
Location: Park Rapids, MN
Posts: 2,989
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Magnum 4 stroke repair

Thanks Mike! Do you lightly heat the crank case first then drive them out, or just tap them out?
Old 04-08-2008, 10:37 PM
  #6  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 8 Likes on 8 Posts
Default RE: Magnum 4 stroke repair

Just tap them out
Old 04-09-2008, 08:30 PM
  #7  
caddy47
Banned
 
Join Date: Mar 2008
Location: Silverdale, WA
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Magnum 4 stroke repair

You must heat the crankcase. They are a press fit. Hobby People are the distributors of Magnum and they will repair it.
Old 04-10-2008, 01:34 PM
  #8  
mscic-RCU
Senior Member
My Feedback: (6)
 
mscic-RCU's Avatar
 
Join Date: Mar 2002
Location: New London, OH
Posts: 1,237
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Magnum 4 stroke repair

Put the crankcase in your oven at 200 degrees F and heat for about 15 to 20 mins and the the bearings will tap out very easily. Reheat crankcase when putting the new ones in.
Old 04-16-2008, 03:56 PM
  #9  
microsprint9
Senior Member
 
microsprint9's Avatar
 
Join Date: Nov 2004
Location: london, ON, CANADA
Posts: 571
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Magnum 4 stroke repair


ORIGINAL: caddy47

You must heat the crankcase. They are a press fit. Hobby People are the distributors of Magnum and they will repair it.
I thought global hobby was the distributor of Magnum engines, Hobby People is just some retial stores, doesn't warranty work get done at global?

PS Say hi to USNA71 for me.
Old 04-17-2008, 10:41 PM
  #10  
vrhoward1122
Member
My Feedback: (1)
 
vrhoward1122's Avatar
 
Join Date: Feb 2008
Location: North Bend, OR
Posts: 58
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Magnum 4 stroke repair

Hobby People is the retail front for Global Hobby.

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



Contact Us - 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.