tacho

[rayza1]

Any one know what sort of tacho works with a magneto and where i might obtain said tacho. It's a 4 cylinder and the hole is about 4". Looking for something old school. Ray

[screwit]

Ray did it have a cable driven Tacho may be ?

[rayza1]

Not that i can see, where would i look for the drive?

[Alan]

Ray,
Usually on the dist, but could be on the end of the cam drive, just look for a speedo drive like screw attachment.

[Bob Vic]

Ray - I used an Auto Meter brand electronic tacho on Rebound.... I also have a Vertex magneto. The kit included a 0-7000 rpm tacho and a little black box with wires hanging out of it that hooks up to the magneto. I was never sure that the tacho reading was right but after fitting the mechanical tacho I now think the electronic unit was probably okay. If you want to try it out, just let me know.

Bob

[DaveD]

Tacho drive below dizzy photo.

[rayza1]

Hi Dave, my magneto is from a ferguson tractor! Apparently it was THE hotup for Vanguards, but no tacho drive!! Hey Bob i will get back to you on that setup of yours, how big is the tacho? I'm guessing 7,000 rpm is going to be plenty. Will it work on a 4 pot? cheers Ray

[screwit]

My fathers fist boat had a cable drive tacho, but it run of the fanbelt by a small spring loaded pulley running on the back of the belt
It was a Stuart warner from memory .

[Bob Vic]

The tacho is 78mm or thereabouts diameter.

[Doc]

Hi Ray,
"Firefly" ran a Vandgard motor and tacho drive ran to the nose of crankshaft. Don't forget we going back to the 50's-60's . Being a 4 banger , i would say in the day they used what they could. More likely a Motorbike cable Tacho and fittings. Don't change the time Walk kept it original, that's the WOW factor.