Would a larger spark plug gap on a Mercruiser 4.3 cause a loss of RPMs at WOT? I am only able to reach a max RPM of 3500-3700 RPMs (engine decal says it should run between 4400-4800) and this occurred after I changed the plugs last season. When I changed the plugs, I accidentally gapped them to 0.45, instead of the manufacturer-recommended spec of 0.35. I have twin 4.3s and both are having this same issue. I've done some other troubleshooting such as a tuneup, new fuel/water separator filters, checked for water in the fuel tank, and installed new coils. Should I just go ahead and pull the plugs and re-gap them correctly or would a 0.10 gap difference even be noticable at high RPMs? Thanks in advance for any helpful info!