Re: Spark plug diagnosis - need your input PLEASE!

Posted by Jerry/MT on March 09, 2007 at 21:33:56 from (206.183.116.129):

In Reply to: Spark plug diagnosis - need your input PLEASE! posted by Steven@AZ on March 09, 2007 at 15:53:37:

I'd say the IH plugs were oil fouled and because you said "...it smokes a bit on start up..." I'd guess that your valve guides might be worn and/or the stem seals on the intake valves are shot. It smokes at start up because oil drips into the cylinder down an open valve. At low rpm (high manifold vacuum), you may also sucking in some from the intake valve guides/and worn stem seal . At high rpms under load,(low manifold vaccum) the problem is greatly reduced.

Regarding the JD, that looks like it carboned up from being too cold a plug, too rich a mixture, or not working it hard enough to get the engine to operating temperature and running it under some load.
Without more info, it's hard to say anymore than that.

Replies:

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]