Reply To: Merc KE-4 gas tank question

[green-thumbs]

KE4 & Mark 7 outboards sold well and are fairly common at swap meets. A parts motor might with a good tank is likely to be a better investment than a special purpse tap AND the time and effort to remove dents.

Tap for tank with the small filter is 1-1/8″x 18 National Standard Mercury  Part # M-60-5070  Bottom filter tap size is 1/8″ National Pipe Taper.

Tap for tank with large hexagonal filter is 1-3/16″x 16 National Standard for BOTH filter and filler neck. Mercury Part # M-60-5071

National Standard is an obsolete name for Unified National Standard. Each trade and industry as it developed attempted to create a standard for fasteners. As a result we have to identify threads and fasteners. Metric has been adopted for things made in last 50 years…just another addition to the complex brew of threads and fasteners.

Louis