From 1970-1980 -- Trojan used AC-Delco gauges. Occasionally, some pre-1980 Trojan F-Boats like the F-30 (1979-1980) used Datcon gauges.
Problems tend to occur when the rules below are not followed. This is the often the mistake of a marine technician who is inexperienced or unaware of how AC-Delco gauges and senders work together. Typically, an owner notices a gauge problem and assumes it's an issue with the sender. The sender is then typically replaced with an off-brand / non-AC-Delco sender -- only to find that the AC-Delco gauge readings are incorrect, or the gauge is not working at all.
Here are some of the basics of AC-Delco gauges and senders:
1. You can identify a AC-Delco gauge by its tin backing. AC-Delco gauges do not have plastic backs.
2. There are two types of AC-Delco gauges - a single station gauge and a dual station gauge. AC-Delco gauges are also stamped as 'Single' or 'Dual' on the side (see photo)
3. Each type of AC-Delco gauge has a single sender. For example, AC-Delco fuel gauges must use a AC-Delco fuel sender. The same applies to engine temperature and oil pressure gauges. Note: A AC-Delco sender will power either a single or a dual gauge system.
4. Trojan used either white needle or orange needle AC-Delco gauges
5. You cannot use a NON AC-Delco gauge with a AC Delco gauge. For example, you cannot change the flybridge gauges to non-Delco without change the lower station gauges as well.
Important:
===>> You *can't* remove a flybridge and expect the lower station AC Delco gauges to work.
===>> You *can't* remove the lower station and expect the flybridge AC Delco gauges to work.
===>> AC Delco senders only work with AC Delco gauges.
At Beacon Marine we have some AC Delco single and dual gauges.
NOTE: Senders for engine temperature and oil pressure are no longer available. WE *DO* have oil pressure, water temperature and fuel gauges that are close match with the look of the Delco gauge. We also have senders for oil pressure, water temperature and fuel.
Questions call -- 609 713 4602
Above is the appearance of the replacement gauge.
