Tempest Plug Urem37by 12pk

clear prop here comes the run-up so good morning ladies and gentlemen and welcome to Grumman pilots YouTube channel directly supporting the Grumman Pilots Association and this morning we're going to look at some spark plugs and these are all the Uwharrie m37 BY spark plugs they're the long reach they add about four horsepower to your engine that's what the manufacture the spark plug says it's one one horsepower per cylinder so pretty cheap horsepower boost and as you'll notice on number one it looks okay number two it's okay in terms of buildup number three it's okay when we get to number four thank goodness this is a you REM because 37b why because the lead has built up if this had been a mass of electrode 38 or 40 e there'd have been arcing across the thing because it was completely covered in the lead so we're gonna go ahead and put these on the bead blaster now after we do the compr