I stupidly bought the wrong size spark plugs and now I have to figure out what the model number for the right ones are. Thanks in advance.
NEWBIE
http://cgi.stanford.edu/~sanjayd/gs500/Upgrades/SparkPlugs
NGK
NGK product numbers for the GS500 Standard: NGK DPR8EA-9 (gap 0.8-0.9mm) reference Iridium: NGK DPR8EIX-9 (Pre gapped from factory)
Denso Iridium: IX24B (Pre gapped from factory)
These E3 PowerMadd plugs are really nice.
http://www.amazon.com/gp/product/B0022ZAFOC/ref=oh_details_o05_s00_i00?ie=UTF8&psc=1