which tach will work best on my 1989 90 horse e-rude v-4 crossflow??? <br /> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=4506143040&ssPageName=STRK:MEW <br /><br /><br /> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=4506484597&ssPageName=STRK:MEWA:IT