Like Tree0Likes

o2 sensor location

Old 05-23-2009, 01:24 AM
Platinum Member
Platinum Member
Trade Score: (1)
articfriends's Avatar
Join Date: Jun 2004
Location: Frankenmuth
My Boats: EX 99 MPH 272 Baja owner, 1999 Scarab 33 AVS NOW
Posts: 6,072

The only place I know of to mount a sensor in stock cast iron exhaust is the bottom side of the manifold near the exhaust port. If you take a stock manifold and turn it over you will see how the paint is burned about a inch or 2 back from the exhaust port,the manifold is single wall at this point,you drill and tap the manifold for your 02 sensor at this point. Put a sensor in #7 and #8,tune for whichever one reads the leanest,don't get to crazy trying to tune it too exact as your not getting a true average of all the cylinders. This is how Tyler Crockett had me mount mine in my stainless marine 3's and right or wrong it has worked for tuning,Smitty
articfriends 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
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 06:37 PM.

Copyright 2011 OffShoreOnly. All rights reserved.