I have purchased the tacho so it will come in handy for future jobs even if it does have a battery that can�t be replaced.
You were spot on about backing off the throttle cable ever so slightly. It does actually make quite a significant difference to the engine speed. Your point about the throttle butterfly only partially closing is very important. I originally had the throttle butterfly set to be fully closed when in the choke position. Now it is in the position of �barely closed� or �partially open�. It still however starts at first pull.
The OHC/ Valve Cover sealed up really well with no noticeable leaks. I let it cure for 24 hours before starting the engine just to be sure it was set correctly. I did end up buying some RTV sealant for future jobs but my existing Permatex appears to have performed well.
I ran the mower for a few minutes in the shed last night and full speed sounds sweet and the idle is very smooth and quiet. You don�t hear that occasional side valve engine misfire like the Briggs Side engines.
If there is anything else you think I should check let me know and I will take care of it.
I will take the mower out for a good run on the weekend and let you know how it goes. I am actually pretty confident it will all go well.
