Notices
O.S. Engines Support Ask Bill Baxter your questions about O.S. Engines.

OS .40 LA Operation

Old 10-06-2017, 09:30 AM
  #1  
ma_mulcahy
Thread Starter
 
Join Date: Dec 2005
Location: Milan, IN
Posts: 233
Likes: 0
Received 0 Likes on 0 Posts
Default OS .40 LA Operation

Bought this engine recently NIB and I have been running it to break in. Using 10% nitro with a castor/synth oil mix. I have a new toy in a Harbor Freight infrared thermometer that I used to take some readings during the runs. Here are my questions:

1) At an ambient air temp of about 75F, I am seeing temps of 200-215F at the cylinder head on the exhaust side, 135-150F on the intake side. Is there a maximum temp I should stay below?

2) I am getting 11,400 on Master Airscrew 10x6 composite. This is after running 3 tanks of fuel and running it slightly rich of peak so it still passes the pinch test. Is this a typical RPM for this engine/prop?

Mike

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.