Good morning Don. I'm new to BBC and i'm already glad I joined. I recently purchased a 2003 NITRO 929 with an 03 225 EFI, 25p Tempest Plus Prop. I was told by local Marine mechanic to use NGK BR8HS plugs with a .35 gap. I feel The boat should be going faster than 63 mph at 5300 RPM. I just read one of you posts and it stated to use only the recommended Champion QL77CC plugs. The Motor had 490 hrs on it when i bought and I want to take care of it and make it last. I guess my question is could not using the recommended plugs cause a performance issue? Was also thinking og upgrading props to a Fury. Thanks

Bruce
US Army
Wisconsin