Yup, you're correct. I stuffed up the unit conversion. That'll teach me to do off-the-cuff conversions at that time o' day!
The 6mm past TDC biz is to get the exhaust tappet onto the true 'base circle' of its cam.
At TDC on compression stroke, the Briggs 'easy-spin starting' setup actually holds the exhaust valve open slightly, to release some compression at starting RPM's. They say it has no effect on operating compression or power, at operating RPM's.
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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