ORIGINAL: Fuelman
The Sonic Tronics 4 cycle plugs are the hottest ones I have ever used, including the Thunderbolt 4-cycle and all the OS offerings.
They have been my only choice for running low or zero in engines designed for higher nitro.
Even though Sonic Tronics show the same plug in the pictures, the OS and Saito style plugs are different. The OS plug looks like an "OS-F" with the necked down portion of the threads. They both run the same.
Where can the Sonic Tronics 4 cycle glow plug be purchased? I would like to try one in my 1.35 Moki engine. Thanls Capt,n