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Cox Glow Plug Voltage
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Cox Glow Plug Voltage
I have always started glow engines with four parallel D Cells delivering 1.5 ish volts. However I had a number of glow plugs that were used and argued and struggled to get hot enough to start with 1.5 volts. I put two D cells in series for 3 V and the glow plugs lit right up and worked well. Even the ones that argued. Is there a problem in using 3V DC? Or will it burn out the filaments?
Thanks
Iceberg
Thanks
Iceberg
Iceberg- Gold Member
- Posts : 367
Join date : 2018-11-03
Location : Manila Philippines
Re: Cox Glow Plug Voltage
Maybe these plugs have a weak electrical connection at the spot weld. I have noticed this too with used plugs. I have 3 D cells in parallel and some barely glow.
Also make sure to shine up the top of the plug with steel wool or fine sand paper. Aluminum oxide is an electrical insulator.
Also make sure to shine up the top of the plug with steel wool or fine sand paper. Aluminum oxide is an electrical insulator.
Jason_WI- Top Poster
Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI
Re: Cox Glow Plug Voltage
They will burn out at 3V.
My guess is they are very dirty and have a lot of resistance if they survived a 3V blast.
My guess is they are very dirty and have a lot of resistance if they survived a 3V blast.
Cribbs74- Moderator
Posts : 11888
Join date : 2011-10-24
Age : 49
Location : Tuttle, OK

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