The iboats forum moderators are excited to announce that at this time it appears the iboats forums posting pictures function is working once again. Though we cannot promise for how long, we're hoping for indefinitely.
If that's the 3cyl then the plug NGK recommends is the BPZ8H-N-10 gapped to .040. Some like to set them at .035.. Start at .040 and play with it and find the sweet spot. Do not go less that .035.