GT-40 Spark Plug recommendations?
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=38929
Printed Date: May-03-2025 at 4:20pm
Topic: GT-40 Spark Plug recommendations?
Posted By: MdFooter
Subject: GT-40 Spark Plug recommendations?
Date Posted: June-07-2016 at 3:19pm
Replies:
Posted By: Jonny Quest
Date Posted: June-07-2016 at 3:33pm
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Autolite 764 is the plug for the GT-40 engine. You don't need platinum, iridium, etc. The Autolite 764 is a copper core plug in the proper heat range for your 351 engine. JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: KENO
Date Posted: June-07-2016 at 7:51pm
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Some places will tell you that 764's are being discontinued. That probably means there's only a 20 year supply left floating around out there. Autolite 104 is the replacement for the 764 and is functionally the same plug, only difference is that the 104 has full threads on the body and the 764's are only threaded halfway. If you look inside the plug hole on a GT-40 or 40P, it will be obvious why either will work. Edit, you'll also see why an Autolite 25 physically won't work in a GT-40 or 40P head. |
Posted By: MdFooter
Date Posted: June-08-2016 at 12:52am
