motor missing at high rpm HELP!?!?!

[C YENSEN]

well it was the first night out for my 84' V20 (470 merc. I/O. 2 barrell) and she started fine, and ran great for about 5 minutes, then she started to miss while we were running at 3900*rpm. we backed it down to 2000 rpm and ran ok, she idled around 900 to 1200 rpm. so we gave her a ten minute break and then when i tried to take it back up to 3900 she would not go over 3100. after talking to a few people we think it is water in the gas (condensation build up). the previous owner stored it with only 20 gallon of gas last winter, and i put a fresh 25 gallon in last night before the ride.

so i got a new filter and a couple bottles of dry gas, hopefully that fixes it.

a mechanic i know said it may be a points problem

any advice or suggestions would be awesome * ???


thanks *

ps. how do i attach an image?