<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hmm, the back of that tach case has obviously been modified. Are you sure it still contains the matching internals? I say this because for 20 years I ran my Mk. I MGB with the original tach case, faceplate & needle, but with a cheap auto parts store mini-tach inside the case. The only modifications were two small screw holes to attach the mechanism.<div class=""><br class=""></div><div class="">An original MGB Mk. I tach would have had a loop in the white wire, attached to the back of the case with a thumb nut and a thin U-shaped brass bracket. I am not seeing that on yours.</div><div class=""><br class=""></div><div class="">Actually, I guess it is unclear whether you are talking about an MGA tach or an early MGB tach...</div><div class=""><br class=""><div class="">
--<br class="">Max Heim<br class="">'66 MGB
</div>
<div><br class=""><blockquote type="cite" class=""><div class="">On Jul 30, 2023, at 5:22 PM, dave northrup <<a href="mailto:dave@ranteer.com" class="">dave@ranteer.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Negative ground, car runs smoothly, need to install the electric tach which supposedly was previously installed in this car and working.<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">On the back view, what hooks up where? I am pretty sure the tab, and the screw, are ground.<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">The other two – one needs to go to power and the other to the coil. I think one is a female bullet connector; the other is male. Which goes to power and which to the coil?<o:p class=""></o:p></div></div><span id="cid:0E29209D-766E-429B-8731-A221A402F560"><tach front view.jpg></span><span id="cid:730CBBD9-8EEC-4550-A299-42A08DE3277F"><tach rear view.jpg></span><span style="caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); 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