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Hey everyone,
Just wanted to post something I found out the hard way rebuilding my carbs. The middle carb main jet orifice tube is different, bigger, then the top and bottom carbs. When ordering that part they are referenced by size and not specific to the middle carb. I had to replace mine as when I removed it for the carb cleaning/rebuild it was siezed in place and needed to be extracted. If you are removing the main jet orifice tubes for cleaning/rebuilding purposes be sure you order the correct one for the middle carb vs the top and bottom. Part number 68 on Marine Engines.com site.

Hope that helps someone.

Billy
1974 17' Montauk