Just picked up a 21ft v-hull with a 115 1987 Suzuki DT with a 13 1/4 - 17 "turning point express" prop. So we took it out on a beat run, and it starts easy and idles calmly. Works great till we get it to about 1500 RPM and it just won't go over that, doesn't die or do anything weird it just won't go any faster than that... I would say 5-6 mph or so. Talked to the previous owner and he was told that it was a bad magneto coil, is there any way that could be the cause? I am going to go down and swap the Primary No. 2 coil for the battery charging coil to see if that fixes it, but I don't know if it is really the cause. Any thoughts on other causes? Thank you very much for any light you can shed on this problem -Glaspar