Great looking boat!
Here is a thread about the poppet valve on a 1999 Merc....should be similar to your Mariner.
http://www.wellcraftv20.com/communit...ghlight=poppet
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Stay Safe!
Sold - 1984 V-20 Cuddy with a 2003 Johnson 140 hp gas sippin 4-stroke.
1995 Ranger 250C with a 2015 Suzuki 300 hp 4-stroke.
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