To get to 200 psi, that is 14:1 compression. Merc spec is 150psi cranking
The. Stock Gen VI is. 9.4:1 motor
Set your timing to 10 BTDC
Check the quality of your fuel
Pull HX
Empty oil
Fill HX with gas or other cheap solvent
Dispose of gas/oil
Use dawn dish soap and hot water to clean remainder residue
If the engine cooling water jacket is full of oil, more cleaning to do
so, other than a flat tire on the ride home from the ramp. todays outing was uneventful.
carb is still running a tad rich. going to back off the jets by 2