Originally posted by Dave Severson
We use pyrometers on snowmobiles to set the jet size whene we get into the higher elevations, works great. Yes I have tried to read alky plugs at night!!! The lighted spark plug viewer is the way to go, though I can see where the heat gun could be used.......
If my friend suspects a dead cylinder on his snowmobile ( Mach Z 700 triple ) he grabs ahold of the suspected cylenders exaust tube, needless to say, he's been burnt more than once