I have a 3A, but it has a GPW engine that is chain drive.  My current project is a true 3A engine with timing gears and I'm just starting to get into it.  I need to replace the front engine plate. 

Pulled the timing cover and pan.  The nylon cam gear looks very good, but I don't see the 'Dot' that aligns with the crank gear dot.  The dot on the crank gear is a small zero "O" more than an indented dot.  It's pretty easy to figure out where TDC is with the pan off, but I was surprised that the gear isn't marked. 

Is it possible to install these gears backwards? Or, more appropriately, with the outside face, toward the inside?

Also, What is the appropriate puller to use for this type of gear?

Thanks

Tim

Hi Tim,

I still have my old timing gear....I don't think you could easily install it front-to-back but as you know anything is possible...

The hole is not conical, it measures ~1.124 on both sides....

You can see the mark on mine, but actually there are a couple marks, but this one looks more "factory"

I know what you mean.  My flywheel is blank as well and for some reason my crankshaft pulley's notch is not in the right place to set timing.  I had to ad a notch myself after a struggle of finding TDC by playing the fish a wire thru plug hole trick by Vernco.
Good luck getting that gear off.