There's a brittle spring clip that's intended to keep the adjustment nut from moving. Sounds to me like yours has broken away. If this is the case, at this time they are not available.
It happened to me on my project engine. I looked at the clip crosseyed and it broke. It still had one of the two legs remaining, the MMI manual says it will continue to function that way but that wouldn't do for me. I ended up making a replacement out of 0.091" spring steel music wire.
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Last edited by ndutton; 10-10-2014 at 08:55 AM.
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