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.

Exhaust residue.....

Old 09-14-2012, 02:50 AM
Thread Starter
Join Date: Nov 2011
Location: NottinghamNottinghamshire, UNITED KINGDOM
Posts: 54
Likes: 0
Received 0 Likes on 0 Posts
Default Exhaust residue.....

I have a 35cc MVVS gas engine that's only had about 4 hrs running in total and is still slighlty rich. I'm using a 1:40 oil/petrol ratio and the engine appears to be running well but the exhaust residue is thick, black, and has a sticky consistency. I am I right in assuming the residue is caused by the slightly rich settings still? The plug is a nice 'sand' color with no significant oily coloration and I'm using a high quality spec 2stroke oil.

Thanks Bob V
Old 08-15-2015, 09:14 PM
cymaz's Avatar
Join Date: Aug 2007
Location: UK
Posts: 718
Likes: 0
Received 2 Likes on 2 Posts

Sounds correct...I am running in an engine on 20:1 in the plane. I have spots of black all over the bottom. At 32:1 it's not bad at all.
Old 03-14-2019, 04:57 PM
Join Date: Apr 2016
Posts: 660
Received 29 Likes on 28 Posts

I have a MVVS 30 in a 1/4 tiger moth, been flying it since 2011, loads of hours on it. 30:1 synthetic and have always had black, thick residue.

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 -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.