I just bought a Sun tach to be used with my Plymouth inline flat six. On the top of face face is printed SUN MFG. CO. CHICAGO ILL. U.S.A. Down to the left below the pointer says MODEL 3 1/2 AT553 On the back below left bolt DIST and below something not readable On the back below right bolt Probably GRD And on the battery lid J16 6 6 CYL Any ideas of year of make, how to get it operating, kind of battery and such? My '37 Plymouth is nowadays 12 volts, negative ground.
Is it a one piece? I though they came out in the mid to late 60's, with a much different design. If it is a two piece I would say, fairly early late 40's early 50's. The Fire truck my sending unit came off was a 47 or 48 Chevrolet it had the same style tach. The tach was mounted in the pumper body and was junk that is the reason I did not take it as well. Williams instruments in Arkansas is your best bet. They did my sending unit and tach.
Neat looking tach, appears period correct for the car. Locate a late model tach and swap out the internals with yours using the old gauge face. There may be a thread here on the HAMB on a how to.
A couple of Years ago I picked up a Older Sun Tack it was Stamped on the Back 1966, its 12 Volt neg. ground. Just my 3.5 cents Live Learn & Die a Fool
Old post, I know, but it popped up a google search so I thought I'd add some photos of a similar tach I have so folks can see the original writing on the back side and the internals. Bought cheap on eBay years ago and converted to magnetic pickup - that's why there's an extra hole for a connector at the top. PXL_20220105_131140730 by 40Tudor posted Jan 5, 2022 at 7:19 AM PXL_20220105_125912200 by 40Tudor posted Jan 5, 2022 at 7:19 AM IMG_20161009_114458369 by 40Tudor posted Oct 21, 2018 at 9:31 AM PXL_20220105_125829255 by 40Tudor posted Jan 5, 2022 at 7:19 AM
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