psneeld wrote:2bucks wrote:
Often you'll find that the tach in the picture will have a pointed tip for use with shafts that have an indentation for a puller or on a regular tach drive fitting. Getting the point to sit and stay in position on a bolt head such as is found on the front of a Lehman engine or most other diesels to get an accurate reading will be more difficult. A photo tach will easily allow you to check and calibrate your tachs. Ask around your marina and I bet you'll find one that you can borrow. It will probably come with the owner who will help you and make the whole job easier.
*never had a problem with mine...just have to get the hang of it and use the other "foot" that looks like the bottom of a door stop and has a flat face.
as long as you have it n hand..calibrating your tachs is a good idea...but that's the thing with alt driven tachs...your never sure if they stay calibrated.
-- Edited by psneeld on Friday 16th of March 2012 03:35:50 PM
*That's a great solution. If you have a flat foot for it and can find it. I don't think I've ever come across one that had anything but the pointed one.