sunday was 2023's ice harvest day!
warmest weather we've had for the event that i can recall - temps in the high 30s/low 40s (note the short-sleeves of some of the volunteers). overnight was about 18*, so that helped for starting things off solid.
speaking of starting off, the truck started right up in the morning. after checking lights etc, headed out to the event. got about 3 miles from home, and near the top of a moderate hill climb (pushing about 2800 rpm), when there was a slight pop, and then loud expulsion of air noises (like from the exhaust or manifold). pulled a u-turn, and drove back home. popped the hood, and low and behold - #6 spark plug wasn't there (mostly). the metal base was still seated, but the ceramic portion and upper electrode were attached to the plug wire/boot, which was draped over the manifolds. thus, the noise was escaping compression sound, not exhaust.
got the correct socket, and the remains of the plug easily backed out of the head (intact, other than the center/ceramic portion). installed a "spare" used plug, and back i went.