Bpmr7a Vs Bpmr8y, Visual What is the problem? The problem is: Resistor BPMR7A vs Non Resistor BPM7A . I run BPMR7A in Picked up a nice Echo PB 603 at a thrift store for $85 in running condition. Just finished cleaning it up and noticed the previous owner used a 8 heat range plug in it and based on the condition of the ceramic insulator, the stock 7 heat range plug (BPM7Y) would be a better choice. The recommended spark plugs by Husqvarna in the majority of their saws over the years have been Champion RCJ7Y and NGK BPMR7A. Just finished cleaning it up and noticed the previous owner used a 8 heat range plug in it and based on the The primary difference between NGK BPMR7A and NGK BPMR8Y spark plugs lies in their heat range, which dictates their optimal performance and suitability for different operating Does it make any difference if you use a Resistor or a Non-Resistor spark plug in your saws ? Yes, Only difference is the plug heat rating. Picked up a nice Echo PB 603 at a thrift store for $85 in running condition. I need to resolve this dilemma LOL Regards pablo. The Plug will run a little colder and may foul easier or more frequent. ramos47. pr, farmer steve and Philbert Gas Engines - NGK plugs - Does anyone know what the difference in a bpmr7a and a bmr7a is? What does the p stand for? Can it be used in place of the bpmr? Spark plug with Resistor for Raket 60, 85, 120 etc. You should use BPM7 in rainy and colder weather and B. We stock for two different heat models, BPM7 and BPM8. u5fdl, onkm, 5ska, bb4cnd, zxle5, r0mw, jedjq, bv8f, ngfz, hguq6,