Sounds like you need to keep putting the penetrating oil to the valves. Here's what I do. I've never had to do it on my own boat but have sorted out a few others. I mix 1/3 transmission fluid and 2/3 acetone ( you only have to mix about half a cup)...it's a very watery mixture but it is just works wicked on stuck valves and rings. Use a flexible tip oil dispenser to shoot it right at the valves. Let it sit a few hours and try it...repeat as necessary. You need to change the oil as soon as you get it running.
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Mo
"Odyssey"
1976 C&C 30 MKI
The pessimist complains about the wind.
The optimist expects it to change.
The realist adjusts the sails.
...Sir William Arthur Ward.
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