northern_lights
Member
This is likely my sending unit right??? Thought maybe some other diagnostics might be in order. Here's the deal...twin 1986 454's FWC. The temp gauge on my last trip had a mind of its own. Port engine holds steady at 150-degrees regardless of rpm setting. However Stbd...holds 150-degrees at 2000 rpms but at 2500 starts bouncing between 140-160 degrees. at 3000 rpms it bounces around 130??? I have both upper and lower helm gauges (34 Tolly Sports Sedan) and the reading is the same at both stations. Could it be anything other than sending unit? Should I run a continuity check on the wiring? As always....appreciate the expert advice.