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 12

Old 05-16-2010, 12:36 AM
  #1  
injunnut1
Senior Member
Thread Starter
 
Join Date: Jun 2004
Location: Cocoa, FL
Posts: 265
Likes: 0
Received 0 Likes on 0 Posts
Default MVVS 12

I just bought (stole actually) a NEW MVVS 12 engine from the eBay "Buy It Now" feature for only $60.00. Received the engine today and it is sure enough a NEW condition engine .... it has the number 12 machined into a smallish circle on the left side of the lower crankcase, will this denote the vintage or age of this big bad boy?!

Can someone tell me the bore of this engine particularly in comparison to the .60 size MVVS? You can likely guess my next question as follows: Will the MVVS .60ci factory diesel head option work in this MVVS 12 (.77ci) engine? And is this MVVS 12 engine indeed STOUT enough to handle diesel operation? Last question: Is there a website or other source where I can fetch up the paper-work (manual / instructions, etc.) on this engine? I have been a Small-Bore (mostly .15s) MVVS Engine Fan for a long time and have always desired a nice Big-Bore MVVS and sure enough one has finally "Fell In My Lap", so to speak!

Thanks to any and all who might comment, offer hints / advise on operation, return feedback, etc. on this engine and my related questions. Sincerely, Donald Garry
Old 05-16-2010, 02:18 AM
  #2  
DarZeelon
Senior Member
 
DarZeelon's Avatar
 
Join Date: Apr 2003
Location: Rosh-HaAyin, ISRAEL
Posts: 8,913
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MVVS 12

Dolald,


This engine has a 12.7 cc displacement and is indeed the .77 cid model.
Later versions of this engines used a black-on-red 'plaque' pasted onto the side of the crankcase; printed '13', to more correctly denote its displacement.

The bore of this engine is 25 mm and the stroke is 26 mm.


It shares its crankshaft with the 15 cc .91, which in turn uses a 27 mm diameter piston, making the .91 the sole 'over-square' engine, in this MVVS class of engines.

The 12.7GFS/R is 'under-square' (what has become popularly known as 'long-stroke'); but it shares neither of its smaller, 10 cc sibling's bore and stroke dimensions (23x24 mm, like the OS.61SF engines).



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.