he means the shaft is tapered but i dont think you could put it on backwards

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i got an idea just burn it on then it wont slip no more

 

on mine timing slipped too 15*

 

your right it is not a straight cut gear and I don't know if it could be put on wrong ... but that would explain why it wouldent go on right just a thought

 

With the front cover off you can see that the gear does not move much because of the tapper. I thought it would at least move back some once you torque it down. Anyhow It is very difficult to get it where you want and set the timing. As soon as you go to torque it it advances about 1 to 1.5 degree. This is ok so I have to decrease it defore I start torquing it down.

I hope I never have to change this again. I want 16 to 16.5. We will see what happens.

 

you need a new gear or possible a new pump shaft, the gears are pressed on or you heat the gear to about 350 deg and you tap it on, then you install the woodruff key.

 

I'm not an expert here, but I don't think this is right. First off, the stock pump/gear does not have a key. Second, I've successfully set my timing, and watched my buddy set his without heating the gear at all, that's just a bad idea. If you heat that gear up, you run a risk of distorting it, especially if you don't know what you're doing.

As far as setting it 1-1.5 deg ahead before you torque it down, this is what I had to do when I did mine. I torqued the nut, and then rechecked timing right away to make sure it was what I wanted.

 

only trying to help.