Glow plug relay

The glow plug relay switches the current to the glow plugs during preheating and—acting as a start-stop timer—often controls the engine’s stop solenoid as well. If the glow plugs no longer receive power, an indirect-injection marine diesel will start poorly or not at all in cold weather, even if the plugs themselves are in good condition. Therefore, do not immediately replace the glow plugs: first measure whether there is voltage at the plugs during preheating. If you do not hear the relay click when turning on the ignition, the relay or wiring is at fault.

A defective relay can also fail in the exact opposite way: contact points that fuse together keep the glow plugs continuously energized, causing them to burn out and draining the battery. A warm glow plug fuse or a glowing glow indicator after starting are telltale signs.

In this category, you will find the 12V glow plug relay / start-stop timer for the Beta Marine Beta 28 and Universal M-25XPB; our range is continuously expanding. Looking for a glow plug relay for a different engine? Contact us with your engine model, and we will find the right relay for you.

You can also find the corresponding glow plugs and starter motors in our range.