I have a Stewart Warner half-sweep electric tachometer measuring rpm in hundreds, with just two leads coming from the back. They are marked: K + (assuming positive lead) 2 - (assuming ground lead) I know it needs to be connected to the distributor, but where do the leads actually connect? Where have you connected yours? Any help would be appreciated. Almost finished with the wiring - this is one of the last steps. Then it's on to EVERYTHING else... Thanks dv
do you know what model it is? that may help since a lot of Stewart Warner electric tachs used a seperate sender.
I'd assume that the tach is old enough to need a sender. A newer one would have 3 leads- pos, ground, & dist. I'm waiting for a manual (eBay) for the tachs with senders so I could trouble shoot mine.
Thanks for the input gentlemen. I do not know the model number as there are no external markings and I'd hate to screw it up by attempting to take it apart. If it needs a sender, that's something else I'll have to buy.... ah well, maybe next payday I'll shop around for one - just in case. dv
Ok, bumping my own thread.... I've got the SW tach. out of the dash now, looking at the back, in addition to the K + and the 2 -, there is a serial number, or something similar on the bottom of the casing. 429370 in silver paint that matches the K + 2 - marks. then, printed with what looks like gloss black paint or an ink stamp is a three digit number. 96(obscured by the silver painted +). it may be a 5 but it's impossible to tell. can anyone offer any easy advice on what model this may be, and what model sender I may need? thanks, dv
My Green Line 8000rpm tach has the same number and it needs a sender. The 965? might be the date (Sept. 65)
Theres two types of senders that should work with it, the big red can type which is what I've got p.n. 429373 (8 cyl. 4 cycles 12 volts) and the smaller gold colored one that attaches directly to the back of the tach.
cool, do you know if there is a specific number or model sender I should be searching for? there's an identical - except for the K and 2 markings - tach on eBay with a sender attached, but I can't get any info off the picture except 8cyl 4 cycle... thanks, dv
I'm not sure if the part numbers matter or not. I know I've seen the big red senders with different numbers even though they are still marked 8cyl., 4cycle, 12v. Maybe they made revisions to it? Another thing, my sender has 3 connections and one I just spotted on the bay has 4, weird.
Hey guys. I have a similar green line and a red box sender. Do you have any wiring diagrams? Sent from my VS995 using The H.A.M.B. mobile app
thought I would toss up a photo or two of an old SW green stripe I have showing the wiring and how the gold box connects, click on the pictures to see em bigger
The post just below yours shows the + and - connection points between sender and tach. Somehow yours must have been worn or wiped away. Bad thing is that sender most likely an early version with obsolete batteries. At least all the ones I've seen without the removable adjuster plug on top did.
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