Review on Boost Engine Performance with Big-Sert OverSized Spark Plug Kit M14x1.25 p/n 5141S by Matt Heringer

Several marine mechanics have told me that after blowing off the helical coil on my Mercury 125 marine engine I could only weld the head. When I took the boat to the welder he quoted me over $3,000. I did a little research and found a big sert kit that ended up saving me thousands of dollars. The kit worked perfectly. My only regret is that I wasn't aware of Time-Sert before using the Coiled Coil.