Stewart Warner mechanical tach drive installation

[hb32]

I was lucky enough to find a SW mechanical tach drive and in the process of installing it. There is a fairly thick washer that is used with the original bolt to keep the pulley in place. Does it need to be there with the drive unit ? I have very little clearance as it is in the 32 with a C69A and had to trim the u bolt upper bracket. The diameter of the drive unit is the same as the outside diameter of the washer. Tried to upload a pic with no luck.

[V8COOPMAN]

Originally Posted by hb32

I was lucky enough to find a SW mechanical tach drive and in the process of installing it. There is a fairly thick washer that is used with the original bolt to keep the pulley in place. Does it need to be there with the drive unit ? I have very little clearance as it is in the 32 with a C69A and had to trim the u bolt upper bracket. The diameter of the drive unit is the same as the outside diameter of the washer. Tried to upload a pic with no luck.

hb32 .....Send that picture to my e-mail and I will try to post it for you. My e-mail BELOW! DD


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[hb32]

Thanks coop

[V8COOPMAN]

Originally Posted by hb32

Thanks coop

Happy to help, Sir! DD

[hb32]

The spacer/washer I was referring to is visible between the pulley and the tach drive

[BlueNotes]

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Perhaps will Whygoby chime in here. He reproduces this SW tach drive and he knows for sure if the spacer is required or not.

[whygoby]

There is no need for a spacer, there's a thick (1/4") flat washer between the gearbox and pulley. I'm out of the 674L tach drives at this time.

[hb32]

Originally Posted by whygoby

There is no need for a spacer, there's a thick (1/4") flat washer between the gearbox and pulley. I'm out of the 674L tach drives at this time.

Somewhat confused. In the pic the spacer or washer depending on what it is called is visible. My question is, do I need it there or can I install the gear drive without it. The gear drive diameter is the same as the spacer. Thanks for the reply.

[whygoby]

Just unbolt the gearbox and remove the spacer, it's not needed. It's hard to tell by the photo....but is there a pulley in place?

[hb32]

Originally Posted by whygoby

Just unbolt the gearbox and remove the spacer, it's not needed. It's hard to tell by the photo....but is there a pulley in place?

Thanks and exactly the information I was hoping for. Yes the pulley is there.