I am new here and have recently bought a 1988 Fourtrak F75. I have trouble cold starting when it needs lots of churning and starts with clouds of smoke (hot starting seems ok - the starter motor is sticking but I intend to replace that). I am getting a voltage at the glow plug, but I have noticed that the relay cuts out the voltage very quickly - after about 1-2 seconds of current, before it stops for a while and then clicks to allow a one second burst of current again.
Is this enough to heat the glow plug for a cold start? How long should the current pass before cutting out? Is there any way that I can test the relay other than substituting it? Are they expensive?
Sorry if I'm asking dumb questions, but I'm new to problem solving on diesels!