There can be several things that will keep it from firing. Let's assume that it's turning over and there is not fire to the plugs. I would suspect the module. I had problems with them on an Evinrude. They seem to go out quite a bit. There is a test you can perform using a multimeter that will determine if it's bad. I can't remember the values it's supposed to be. Try checking on line. I believe I found it in the past on a website from a manufacturer. Try this site. http://www.maxrules.com/ He seems to have the knowledge and is willing to share it.
The dry weight of a 1985 model, 40 hp Mercury outboard is 152 lbs.
A 40 hp Mercury outboard, serial number 7032376, would be a 1974 year model.
An 40 hp Mercury outboard, serial number 7197998 would be a 1983 year model.
50:1
The dry weight for a 1997 model, 40 hp Mercury outboard, is listed at 177 lbs.
A 40 hp Mercury outboard, serial number 5897057, would have been manufactured in late 1981.
1990-91.
The 2 cycle 40 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
A 40 hp Mercury outboard, serial number 6052990, would be a 1982 year model.
approx, 220 lbs
yes it has one
i think it's about 204 pounds