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

front seal drips

Old 06-30-2012, 08:16 AM
Thread Starter
Join Date: Mar 2007
Location: wilmington, NC
Posts: 618
My Gallery
My Models
My Feedback
Default front seal drips

New 61fx,leaks ARO after sitting a while, just broke it in,runs fine,only 2 tanks of fuel run thru. no play at all in shaft,,is this a normal occurence? Also, where is the low speed needle valve located,,manual doesnt show where it is.
tazzzz is offline  
Reply With Quote
Old 07-05-2012, 07:03 AM
Join Date: Apr 2002
Location: Champaign, IL
Posts: 19,360
Default RE: front seal drips

If you put oil into the engine after running it, and you then store the engine nose down, you'll get oil dripping out through the front bearing. That's because the front bearing really doesn't seal the engine. The seal is caused by a film of oil between the crankshaft and crankcase between the carburetor and front bearing. The pressures inside the engine force oil to the front bearing while the engine's running. There's a small channel in that area to help suck back excess oil. When the engine's running, a small amount of unburned fuel will come from there, but there should be no spraying.

The idle mixture adjustment for the .61 FX should be in the center of the throttle arm. It looks like a small slotted screw.
Bax is offline  
Reply With Quote

Thread Tools
Search this Thread
Display Modes

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

All times are GMT -8. The time now is 08:00 AM.