Notices
MVVS Support Get support from 3 qualified MVVS Forum Hosts. Dar Zeelon, representative from Israel. David Moen, representative from Canada. Pe Reivers, representative from Netherlands.

MVVS 6.5 disassembly help

Old 05-02-2012, 01:26 PM
  #1  
Stand
Thread Starter
 
Stand's Avatar
 
Join Date: Jan 2003
Location: Richland, WA
Posts: 106
Likes: 0
Received 1 Like on 1 Post
Default MVVS 6.5 disassembly help

I have an older MVVS (1995) engine that I need to replace the bearings. I am not having success in removing the sleeve. I have tried heating the case with a propane torch and gently prying under the bolts holding the cylinder casing to the base. I also tried using the casing bolts by unscrewing them to put pressure on the sleeve. I seems to be stuck and I don't want to beat it up taking it apart. I haven't tried putting it in an oven. And I assume that I'll have to do that to remove the bearings.

From the parts lists in Europe it looks like the sleeve should just slide up and out. I want to make sure there's not something holding it that I'm over looking.

Any suggestions?

Stan D

Never mind. I got it out. Just had to apply the heat a little more vigorously. Got apart and changed the bearings. It's all back together agian and ready to roar!
Old 05-02-2012, 01:53 PM
  #2  
pe reivers
Senior Member
 
Join Date: Jan 2002
Location: Arcen, , NETHERLANDS
Posts: 6,571
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MVVS 6.5 disassembly help

take the head off, and remove rear cover / carb. Loosen the prop drive, but do not take parts off. The prop drive taper is not self-locking, so should pop off easily.
take the 4 screws that hold the cylinder jacket out.
Heat the case until the cylinder jacket/sleeve assembly loosens. (loctite on jacket/case junction)
it now is easy to remove the sleeve/piston/jacket/conrod assy from the engine
with case still hot, and crankshaft loosened but still in place as bearing guide, tap case on a wooden block to get the rear bearing loose.
remove rear bearing, re-insert crankshaft
tap out the front bearing using the crankshaft as bearing guide

Assemble in reverse order using loctite between jacket and crankcase.

Case heating is best done with a paint stripper. Use just enough heat to get the job done (about 100°C or 200°F)
Old 05-02-2012, 03:26 PM
  #3  
Stand
Thread Starter
 
Stand's Avatar
 
Join Date: Jan 2003
Location: Richland, WA
Posts: 106
Likes: 0
Received 1 Like on 1 Post
Default RE: MVVS 6.5 disassembly help

Thanks I got all done. Just needed a little more heat on the case!

Cheers
Stan D
Old 07-29-2012, 07:06 PM
  #4  
fiery
My Feedback: (2)
 
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,995
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MVVS 6.5 disassembly help

Love the paint stripper idea

I use the oven (my lady hates that) or a propane torch (leaves marks sometimes, and you have to be careful to "spread" the heat.


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.