Not familiar with your model. On my 169 I drilled a hole in the center big enough to put in a sheet metal screw. Grabbed the screw head with pliers and popped it out.
Installed a new one with Permatex anaerobic gasket maker.
Partstree part number for mine is 726-0216. It wasn't a tight fit. The only thing holding it in is the Permatex. Hasn't leaked yet though. It was the first and only one I've replaced. Your results may be different.
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