My manual tells me to torque my plugs at 18ft/lbs or major malfunction may occur. I tried to torque them at this spec, but it felt like I was going to strip the threads out....so I just tightened them by feel like I usually do. Do they need to be "specifically torqued"? In the past I have never torqued a spark plug, on a car or marine engine....any comments out there?...thanks.
It does sound like a wrench problem. I have done them without the torque wrench for years without a problem. They have to be tight enough to seal and not back out. You can strip the threads out if you overdo. 18 lbs shouldn't require that much of a pull.