Tacho drive shaft to non-tacho engine, experience?

[star63]

I have a sedan engine in my Pagoda and it doesn't have a drive for the tachometer cable. I know that it is recommended to change the horizontal and vertical shafts as a pair. To make the job a little bit easier I'm considering to change only the vertical one. Any experience of potential problems if doing that?

[ja17]

Hello,

These gears come in matched pairs.  You may have wear issues just changing one gear. You may not!
I have seen just one changed and it worked fine.  No guaranteed success unless both are changed. Also repair or replacement of the aluminum/bushing is most important or any combination will wear.

If you change just one gear, I would occassionally check the endplay on the vertical timing gear. This will indicate if you have any premature gear wear.

Besides being difficult to change, these gears are expensive!

[glenn]

I've tried to remove the aluminum bushing on two engines with no success.  Still looking for the magic solution!.  ..

[ja17]

Hello Glenn,

I assume you did remove the 10mm set screw and then had difficulty removing the bushing?

[glenn]

Joe, Set screw is out, PB Blaster in, dry ice applied---- bushing is still solidly in there!!!  Is the bushing available from MB?  Cut out the old one to get the new in???

[Naj ✝︎]

Screw the big cap back in a few threads to give you room to lever it out with a screw driver etc.

Yes, new ones are available from MB or aftermarket.

naj

[ja17]

Hello,

Yes, Naj has the process!  Try this first.  You can even tap it down a bit to loosen it up before prying it out.