1985 60hp mercury 3 cyl cranking timing degree?

Motorhead8686

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Jul 3, 2018
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I am not sure completely on timing degree. The book says 28° cranking and at 5300 rpm its 23°. I've seen on here people recommend 21°so does that mean its 26°cranking? Just dont want to hurt my motor but having the wrong degrees. Thanks in advance for your help.
 
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