I believe you can also check the resistance with a multimeter.
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
On Oct 29, 2017 6:10 PM, "Michael Cotton via CnC-List" <
cnc-list@cnc-list.com> wrote:
> Before you go do all that work and expense test the glow plugs. Use a
> digital laser
Before you go do all that work and expense test the glow plugs. Use a digital
laser thermometer and with a cold engine activate the glow plugs. Maybe even do
it twice. Aim the laser thermometer at each glow plug. If you see any temp rise
that glow plug is working. Glow plugs are 100% or 0%
I was talking to a friend today who had been working on our club launch and had
replaced the glow plugs to fix a problem with poor starting. I have never
thought about replacing the glow plugs which I can only assume are original to
the boat/engine (27 year old Universal M4-30). I haven’t
