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I've been getting back to my long forgotten SL350K2 project. Since the engine was put together (several years ago by someone else) the tach has not worked. I could see that the tach drive at the engine was not spinning while the engine ran.

So I finally popped the seal and pulled the tach drive out. As you see below the gear is all messed up. It looks to me like there isn't a huge amount of metal loss, much of what you see is folding of the gear "splines". Since assembly, it has had about 50 miles of road riding. So the question is where to go from here.

I assume this gear meshes with a gear on the cam? Any chance the cam won the battle and is in reasonable shape? I did insert the shaft partially (undamaged end of the gear) and it did spin when I kicked the engine over.

Can the cam drive assembly be removed without taking apart the head?

thanks,

Jim

IMG_3418.jpg
 

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Sounds like you could use a good service manual. PM sent.

Additionally, folks who are experts on your model will be along to advise.

Welcome to the group.

Got pictures?:p
 

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The Cam Gear is not removable.
It is an integral part of the cam casting.


Take a bright flash light and look down the Tach Drive hole while having someone turn the motor over by hand.
(pull the spark plugs to you don't have to fight the compression)

You will need (2) full turns to see the complete cam gear.

The motor must come out of the frame to get access to the CAM without damaging the Cam Bearing End Caps.
 
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