I've got this photo tach that has worked real well on my other engines. I went to use it on the Ingersoll. The flywheel screen is covered by the shroud. The only thing available is the pto and it has to be on to check that end, which slows the engine down an unknown amount with the mower in gear. I even checked the flywheel shroud/engine cover in hopes there might be some kind of removeable plate. Nope!.
Edited by LilysDad, May 27, 2017 - 12:05 PM.