Re: Unleaded gas in old engines

Posted by Dean on July 16, 2011 at 04:53:29 from (68.46.208.21):

In Reply to: Unleaded gas in old engines posted by Jason, NW Ontario on July 16, 2011 at 04:42:11:

Most will tolerate unleaded gasoline so long as they have induction hardened valve seats and/or they are not worked at high output for extended periods (as they were originally designed).

The wireing issue is most likely a design flaw or a timing issue causing the exhaust manifold to overheat. This is usually the result of retarded ignitioin timing due to incorrect static timing or, more likely, a sticking or otherwise faulty centrifugal spark advance.

Ethanol is another matter entirely.

Dean

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